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[209.85.217.172]) by smtp.gmail.com with ESMTPSA id x195sm4518668vkd.5.2016.10.01.07.28.51 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 01 Oct 2016 07:28:51 -0700 (PDT) Received: by mail-ua0-f172.google.com with SMTP id v7so43050824uaa.0 for ; Sat, 01 Oct 2016 07:28:51 -0700 (PDT) X-Received: by 10.176.66.164 with SMTP id j33mr9137312uaj.162.1475332131403; Sat, 01 Oct 2016 07:28:51 -0700 (PDT) MIME-Version: 1.0 Received: by 10.31.163.135 with HTTP; Sat, 1 Oct 2016 07:28:50 -0700 (PDT) In-Reply-To: References: From: Richard Mortier Date: Sat, 1 Oct 2016 15:28:50 +0100 X-Gmail-Original-Message-ID: Message-ID: To: Hannes Mehnert Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] load/startup time error handling X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMzAgU2VwdGVtYmVyIDIwMTYgYXQgMTc6MTMsIEhhbm5lcyBNZWhuZXJ0IDxoYW5uZXNAbWVo bmVydC5vcmc+IHdyb3RlOgo+IEhleSwKPgo+IFRoZXJlIGhhcyBiZWVuIGxvdHMgb2YgdGhyZWFk cyBhYm91dCBlcnJvciByZXBvcnRpbmcgKGJvdGggb24gdGhpcyBsaXN0Cj4gYW5kIGluIHNldmVy YWwgaXNzdWVzKS4gIEkgd2FudCB0byBmb2N1cyBpbiBoZXJlIG9ubHkgb24gX2xvYWQgdGltZQo+ IGVycm9yc18gLSB3aGljaCBoYXBwZW4gZHVyaW5nIHN0YXJ0dXAgKGV4YWN0bHkgd2hlbiBgY29u bmVjdGAgaXMKPiBjYWxsZWQpLiAgUGxlYXNlIGxlYXZlIHJ1biB0aW1lIGVycm9yIGhhbmRsaW5n IG91dCBvZiB0aGlzIHRocmVhZC4KPgo+IFNvIGZhciwgY29ubmVjdCByZXR1cm5zIFsgYE9rIG9m ICdhIHwgYEVycm9yIG9mICdiIF0gTHd0LnQsIGFuZCBpbiB0aGUKPiBlcnJvciBjYXNlIGZ1bmN0 b3JpYSBlbWl0cyBhICJmYWlsIChGYWlsdXJlIDxkZXZpY2VuYW1lPikiLiAgVGhpcyBpcwo+IGNs ZWFybHkgbm90IHZlcnkgaW5mb3JtYXRpdmUgdG8gcG90ZW50aWFsIHVzZXJzIChhbiBleGFtcGxl IGJlaW5nCj4gIkZhaWx1cmUgbmV0MTEiKS4KPgo+IEkndmUgaXRlcmF0ZWQgb3ZlciB0aGUgcG90 ZW50aWFsIHNvbHV0aW9ucyB3aXRoIE1pbmR5IHNvbWUgZGF5cyBhZ28sIGFuZAo+IHdhbnRlZCB0 byBhc2sgdGhlIGJyb2FkZXIgZGV2ZWxvcGVyIGNvbW11bml0eTogaXMgdGhlcmUgYW55IG5vbi1m YXRhbAo+IGluaXRpYWxpc2F0aW9uIGVycm9yIHlvdSBjYW4gdGhpbmsgb2Y/ICBJIGNhbm5vdCB0 aGluayBvZiBhbnkgKGFuZAo+IGNvdWxkbid0IGZpbmQgYW55IGluIHZhcmlvdXMgbGlicmFyaWVz IEkgbG9va2VkIGludG8pLiAgSSBhbHNvIGNhbm5vdAo+IHRoaW5rIG9mIGFjdGlvbnMgeW91J2Qg bGlrZSB0byBkbyB3aGVuIGEgZmFpbHVyZSBvY2N1cnMgZHVyaW5nIHN0YXJ0dXAKPiAoYXBhcnQg ZnJvbSBmaXhpbmcgdGhlIGNvZGUsIHJlY29tcGlsaW5nLCBhbmQgcmVzdGFydGluZykuCj4KPiBC ZWNhdXNlLCBpZiBub3QsIHdlIGNhbiBzaW1wbGlmeSB0aGlzIHJhdGhlciByYWRpY2FsbHkgYnkg aGF2aW5nIGNvbm5lY3QKPiByZXR1cm4gYW4gJ2EgTHd0LnQsIGFuZCBpbiBjYXNlIG9mIGFuIGVy cm9yIChzdWNoIGFzICJwZXJtaXNzaW9uIGRlbmllZCIKPiBpbiBtaXJhZ2UtbmV0LXVuaXgpIGZh aWwgYW5kIG5ldmVyIHRyYW5zaXQgaW50byBydW5uaW5nIHN0YXRlIG9mIHRoZQo+IHVuaWtlcm5l bC4KPgo+IFRoaXMgd291bGQgYWxzbywgYXMgYSBzaWRlIGVmZmVjdCwgc2ltcGxpZnkgcnVuIHRp bWUgZXJyb3JzIHNpbmNlIHRoZQo+IHR5cGUgZXJyb3Igd291bGQgbm90IG5lZWQgdG8gYmUgY29u dm9sdXRlZCB3aXRoIHRoZSBwb3RlbnRpYWwgc3RhcnR1cAo+IGVycm9ycyBhcyBpdCBpcyB0aGUg Y2FzZSBub3cuCj4KPiBJZiBub2JvZHkgZGlzYWdyZWVzIChhbmQgY29tZXMgdXAgd2l0aCBub24t Y29udHJpdmVkIGV4YW1wbGVzKSwgSSdtCj4gaGFwcHkgdG8gbWFzc2FnZSBjb2RlIGludG8gdGhp cyBkaXJlY3Rpb24gd2l0aGluIHRoZSBuZXh0IGZldyBkYXlzLgoKU291bmRzIGdvb2QgdG8gbWUg dG9vIQoKT25seSB0aGluZyB0aGF0IGNvbWVzIHRvIG1pbmQgaXMgdG8gY2xhcmlmeTogaW4gY2Fz ZXMgd2hlcmUgb25lIHdyaXRlcwphIHVuaWtlcm5lbCB0aGF0IGNhbiB1c2UgKGVnKSBvbmUgb2Yg dHdvIGRldmljZXMsIGlzIHRoZXJlIGEgd2F5IHRvCmRldGVybWluZSB3aGljaCBvZiB0aGUgZGV2 aWNlcyBpcyBhY3R1YWxseSBhdmFpbGFibGUgYXQgYm9vdCwgd2l0aG91dAp0cmlnZ2VyaW5nIGFu IGVycm9yPwoKKEknbSB0aGlua2luZyBvZiB0aGUgY2FzZSBvZiBzb21ldGhpbmcgbGlrZSBhIHJv dXRlciB0aGF0IHN1cHBvcnRzIE4KcG9ydHMgd2hlcmUgTiBpc24ndCBrbm93biB1bnRpbCBydW50 aW1lLikKCkhhdmluZyBzYWlkIHRoYXQsIGlmIHRoaXMgaXNuJ3Qgc3VwcG9ydGVkIGF0IHByZXNl bnQgYW55d2F5LCB0aGVuIGl0CnNvdW5kcyBsaWtlIHNvbWV0aGluZyB0aGF0IG1pZ2h0IG5lZWQg YSBkZXZpY2UgaW50ZXJmYWNlIHVwZGF0ZSBpbgpmdXR1cmUgYW5kIHNvIHNob3VsZG4ndCBzdGFs bCB5b3VyIHN1Z2dlc3Rpb24uCgooT3IgbWF5YmUgdGhlIG1vZGVsIGlzIHRoYXQgeW91IGxhdGUg YmluZCBOIGJ5IHJlYnVpbGRpbmcgdGhlCnVuaWtlcm5lbCBvbmNlIHlvdSBkbyBrbm93IHdoYXQg TiBpcz8pCgotLSAKUmljaGFyZCBNb3J0aWVyCnJpY2hhcmQubW9ydGllckBjbC5jYW0uYWMudWsK Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCk1pcmFnZU9T LWRldmVsIG1haWxpbmcgbGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpo dHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1hbi9saXN0aW5mby9taXJh Z2Vvcy1kZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Sat Oct 01 14:29:07 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sat, 01 Oct 2016 14:29:07 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bqLHd-0002f0-5X; 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[209.85.217.172]) by smtp.gmail.com with ESMTPSA id x195sm4518668vkd.5.2016.10.01.07.28.51 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 01 Oct 2016 07:28:51 -0700 (PDT) Received: by mail-ua0-f172.google.com with SMTP id v7so43050824uaa.0 for ; Sat, 01 Oct 2016 07:28:51 -0700 (PDT) X-Received: by 10.176.66.164 with SMTP id j33mr9137312uaj.162.1475332131403; Sat, 01 Oct 2016 07:28:51 -0700 (PDT) MIME-Version: 1.0 Received: by 10.31.163.135 with HTTP; Sat, 1 Oct 2016 07:28:50 -0700 (PDT) In-Reply-To: References: From: Richard Mortier Date: Sat, 1 Oct 2016 15:28:50 +0100 X-Gmail-Original-Message-ID: Message-ID: To: Hannes Mehnert Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] load/startup time error handling X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMzAgU2VwdGVtYmVyIDIwMTYgYXQgMTc6MTMsIEhhbm5lcyBNZWhuZXJ0IDxoYW5uZXNAbWVo bmVydC5vcmc+IHdyb3RlOgo+IEhleSwKPgo+IFRoZXJlIGhhcyBiZWVuIGxvdHMgb2YgdGhyZWFk cyBhYm91dCBlcnJvciByZXBvcnRpbmcgKGJvdGggb24gdGhpcyBsaXN0Cj4gYW5kIGluIHNldmVy YWwgaXNzdWVzKS4gIEkgd2FudCB0byBmb2N1cyBpbiBoZXJlIG9ubHkgb24gX2xvYWQgdGltZQo+ IGVycm9yc18gLSB3aGljaCBoYXBwZW4gZHVyaW5nIHN0YXJ0dXAgKGV4YWN0bHkgd2hlbiBgY29u bmVjdGAgaXMKPiBjYWxsZWQpLiAgUGxlYXNlIGxlYXZlIHJ1biB0aW1lIGVycm9yIGhhbmRsaW5n IG91dCBvZiB0aGlzIHRocmVhZC4KPgo+IFNvIGZhciwgY29ubmVjdCByZXR1cm5zIFsgYE9rIG9m ICdhIHwgYEVycm9yIG9mICdiIF0gTHd0LnQsIGFuZCBpbiB0aGUKPiBlcnJvciBjYXNlIGZ1bmN0 b3JpYSBlbWl0cyBhICJmYWlsIChGYWlsdXJlIDxkZXZpY2VuYW1lPikiLiAgVGhpcyBpcwo+IGNs ZWFybHkgbm90IHZlcnkgaW5mb3JtYXRpdmUgdG8gcG90ZW50aWFsIHVzZXJzIChhbiBleGFtcGxl IGJlaW5nCj4gIkZhaWx1cmUgbmV0MTEiKS4KPgo+IEkndmUgaXRlcmF0ZWQgb3ZlciB0aGUgcG90 ZW50aWFsIHNvbHV0aW9ucyB3aXRoIE1pbmR5IHNvbWUgZGF5cyBhZ28sIGFuZAo+IHdhbnRlZCB0 byBhc2sgdGhlIGJyb2FkZXIgZGV2ZWxvcGVyIGNvbW11bml0eTogaXMgdGhlcmUgYW55IG5vbi1m YXRhbAo+IGluaXRpYWxpc2F0aW9uIGVycm9yIHlvdSBjYW4gdGhpbmsgb2Y/ICBJIGNhbm5vdCB0 aGluayBvZiBhbnkgKGFuZAo+IGNvdWxkbid0IGZpbmQgYW55IGluIHZhcmlvdXMgbGlicmFyaWVz IEkgbG9va2VkIGludG8pLiAgSSBhbHNvIGNhbm5vdAo+IHRoaW5rIG9mIGFjdGlvbnMgeW91J2Qg bGlrZSB0byBkbyB3aGVuIGEgZmFpbHVyZSBvY2N1cnMgZHVyaW5nIHN0YXJ0dXAKPiAoYXBhcnQg ZnJvbSBmaXhpbmcgdGhlIGNvZGUsIHJlY29tcGlsaW5nLCBhbmQgcmVzdGFydGluZykuCj4KPiBC ZWNhdXNlLCBpZiBub3QsIHdlIGNhbiBzaW1wbGlmeSB0aGlzIHJhdGhlciByYWRpY2FsbHkgYnkg aGF2aW5nIGNvbm5lY3QKPiByZXR1cm4gYW4gJ2EgTHd0LnQsIGFuZCBpbiBjYXNlIG9mIGFuIGVy cm9yIChzdWNoIGFzICJwZXJtaXNzaW9uIGRlbmllZCIKPiBpbiBtaXJhZ2UtbmV0LXVuaXgpIGZh aWwgYW5kIG5ldmVyIHRyYW5zaXQgaW50byBydW5uaW5nIHN0YXRlIG9mIHRoZQo+IHVuaWtlcm5l bC4KPgo+IFRoaXMgd291bGQgYWxzbywgYXMgYSBzaWRlIGVmZmVjdCwgc2ltcGxpZnkgcnVuIHRp bWUgZXJyb3JzIHNpbmNlIHRoZQo+IHR5cGUgZXJyb3Igd291bGQgbm90IG5lZWQgdG8gYmUgY29u dm9sdXRlZCB3aXRoIHRoZSBwb3RlbnRpYWwgc3RhcnR1cAo+IGVycm9ycyBhcyBpdCBpcyB0aGUg Y2FzZSBub3cuCj4KPiBJZiBub2JvZHkgZGlzYWdyZWVzIChhbmQgY29tZXMgdXAgd2l0aCBub24t Y29udHJpdmVkIGV4YW1wbGVzKSwgSSdtCj4gaGFwcHkgdG8gbWFzc2FnZSBjb2RlIGludG8gdGhp cyBkaXJlY3Rpb24gd2l0aGluIHRoZSBuZXh0IGZldyBkYXlzLgoKU291bmRzIGdvb2QgdG8gbWUg dG9vIQoKT25seSB0aGluZyB0aGF0IGNvbWVzIHRvIG1pbmQgaXMgdG8gY2xhcmlmeTogaW4gY2Fz ZXMgd2hlcmUgb25lIHdyaXRlcwphIHVuaWtlcm5lbCB0aGF0IGNhbiB1c2UgKGVnKSBvbmUgb2Yg dHdvIGRldmljZXMsIGlzIHRoZXJlIGEgd2F5IHRvCmRldGVybWluZSB3aGljaCBvZiB0aGUgZGV2 aWNlcyBpcyBhY3R1YWxseSBhdmFpbGFibGUgYXQgYm9vdCwgd2l0aG91dAp0cmlnZ2VyaW5nIGFu IGVycm9yPwoKKEknbSB0aGlua2luZyBvZiB0aGUgY2FzZSBvZiBzb21ldGhpbmcgbGlrZSBhIHJv dXRlciB0aGF0IHN1cHBvcnRzIE4KcG9ydHMgd2hlcmUgTiBpc24ndCBrbm93biB1bnRpbCBydW50 aW1lLikKCkhhdmluZyBzYWlkIHRoYXQsIGlmIHRoaXMgaXNuJ3Qgc3VwcG9ydGVkIGF0IHByZXNl bnQgYW55d2F5LCB0aGVuIGl0CnNvdW5kcyBsaWtlIHNvbWV0aGluZyB0aGF0IG1pZ2h0IG5lZWQg YSBkZXZpY2UgaW50ZXJmYWNlIHVwZGF0ZSBpbgpmdXR1cmUgYW5kIHNvIHNob3VsZG4ndCBzdGFs bCB5b3VyIHN1Z2dlc3Rpb24uCgooT3IgbWF5YmUgdGhlIG1vZGVsIGlzIHRoYXQgeW91IGxhdGUg YmluZCBOIGJ5IHJlYnVpbGRpbmcgdGhlCnVuaWtlcm5lbCBvbmNlIHlvdSBkbyBrbm93IHdoYXQg TiBpcz8pCgotLSAKUmljaGFyZCBNb3J0aWVyCnJpY2hhcmQubW9ydGllckBjbC5jYW0uYWMudWsK Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCk1pcmFnZU9T LWRldmVsIG1haWxpbmcgbGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpo dHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1hbi9saXN0aW5mby9taXJh Z2Vvcy1kZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Sat Oct 01 14:32:53 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Sat, 01 Oct 2016 14:32:53 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bqLLQ-00037n-H3; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 55247 invoked from network); 1 Oct 2016 14:32:49 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-9.tower-21.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 1 Oct 2016 14:32:49 -0000 Received: from [192.168.0.8] (cpc92320-cmbg19-2-0-cust3425.5-4.cable.virginm.net [82.13.77.98]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id D9CC03A22; Sat, 1 Oct 2016 16:32:48 +0200 (CEST) To: Richard Mortier References: From: Hannes Mehnert Message-ID: Date: Sat, 1 Oct 2016 15:32:43 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] load/startup time error handling X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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HTTP; Sat, 1 Oct 2016 08:22:50 -0700 (PDT) In-Reply-To: References: From: Thomas Leonard Date: Sat, 1 Oct 2016 16:22:50 +0100 Message-ID: To: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] load/startup time error handling X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMSBPY3RvYmVyIDIwMTYgYXQgMTU6MjgsIFJpY2hhcmQgTW9ydGllcgo8cmljaGFyZC5tb3J0 aWVyQGNsLmNhbS5hYy51az4gd3JvdGU6Cj4gT24gMzAgU2VwdGVtYmVyIDIwMTYgYXQgMTc6MTMs IEhhbm5lcyBNZWhuZXJ0IDxoYW5uZXNAbWVobmVydC5vcmc+IHdyb3RlOgo+PiBIZXksCj4+Cj4+ IFRoZXJlIGhhcyBiZWVuIGxvdHMgb2YgdGhyZWFkcyBhYm91dCBlcnJvciByZXBvcnRpbmcgKGJv dGggb24gdGhpcyBsaXN0Cj4+IGFuZCBpbiBzZXZlcmFsIGlzc3VlcykuICBJIHdhbnQgdG8gZm9j 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Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] load/startup time error handling X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMDkvMzAvMjAxNiAxMToxMyBBTSwgSGFubmVzIE1laG5lcnQgd3JvdGU6Cgo+IEhleSwKPgo+ IFRoZXJlIGhhcyBiZWVuIGxvdHMgb2YgdGhyZWFkcyBhYm91dCBlcnJvciByZXBvcnRpbmcgKGJv dGggb24gdGhpcyBsaXN0Cj4gYW5kIGluIHNldmVyYWwgaXNzdWVzKS4gIEkgd2FudCB0byBmb2N1 cyBpbiBoZXJlIG9ubHkgb24gX2xvYWQgdGltZQo+IGVycm9yc18gLSB3aGljaCBoYXBwZW4gZHVy aW5nIHN0YXJ0dXAgKGV4YWN0bHkgd2hlbiBgY29ubmVjdGAgaXMKPiBjYWxsZWQpLiAgUGxlYXNl IGxlYXZlIHJ1biB0aW1lIGVycm9yIGhhbmRsaW5nIG91dCBvZiB0aGlzIHRocmVhZC4KPgo+IFNv 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X-Env-Sender: prvs=077e051ce=Ian.Jackson@citrix.com X-Msg-Ref: server-6.tower-31.messagelabs.com!1475512070!37837631!1 X-Originating-IP: [66.165.176.89] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogNjYuMTY1LjE3Ni44OSA9PiAyMDMwMDc=\n,received_headers: No Received headers X-StarScan-Received: X-StarScan-Version: 8.84; banners=-,-,- X-VirusChecked: Checked Received: (qmail 32705 invoked from network); 3 Oct 2016 16:27:52 -0000 Received: from smtp.citrix.com (HELO SMTP.CITRIX.COM) (66.165.176.89) by server-6.tower-31.messagelabs.com with RC4-SHA encrypted SMTP; 3 Oct 2016 16:27:52 -0000 X-IronPort-AV: E=Sophos;i="5.31,438,1473120000"; d="scan'208";a="382094972" From: Ian Jackson MIME-Version: 1.0 Message-ID: <22514.34545.829269.902279@mariner.uk.xensource.com> Date: Mon, 3 Oct 2016 17:27:29 +0100 To: Lars Kurth In-Reply-To: <1474656929-3528-5-git-send-email-lars.kurth@citrix.com> References: <1474656929-3528-1-git-send-email-lars.kurth@citrix.com> <1474656929-3528-5-git-send-email-lars.kurth@citrix.com> X-Mailer: VM 8.2.0b under 24.4.1 (i586-pc-linux-gnu) X-DLP: MIA2 Cc: xen-devel@lists.xenproject.org, win-pv-devel@lists.xenproject.org, committers@xenproject.org, mirageos-devel@lists.xenproject.org, xen-api@lists.xenproject.org Subject: Re: [MirageOS-devel] [PATCH v3 4/4] Addressed comments on quorum and security team members X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" TGFycyBLdXJ0aCB3cml0ZXMgKCJbUEFUQ0ggdjMgNC80XSBBZGRyZXNzZWQgY29tbWVudHMgb24g cXVvcnVtIGFuZCBzZWN1cml0eSB0ZWFtIG1lbWJlcnMiKToKPiBNYWluIGNoYW5nZXMKPiBMZWFk ZXJzaGlwIHRlYW0gZGVjaXNpb25zOiBleHByZXNzIHF1b3J1bSBpbiB0ZXJtcyBvZiArMSB2b3Rl 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ZGV2ZWwK From mirageos-devel-bounces@lists.xenproject.org Tue Oct 04 09:49:54 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 04 Oct 2016 09:49:54 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brMM0-0006Zd-L6; Tue, 04 Oct 2016 09:49:40 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brMLz-0006YA-6s; Tue, 04 Oct 2016 09:49:39 +0000 Received: from [85.158.139.211] by server-2.bemta-5.messagelabs.com id 4E/55-01972-23B73F75; Tue, 04 Oct 2016 09:49:38 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrBKsWRWlGSWpSXmKPExsWyU9JRQtew+nO 4QftNSYve1rssFn8WJ1p8Wd7AaPF9y2QmBxaPwx+usAQwRrFm5iXlVySwZnxd8IexoEOlomn6 TfYGxjPKXYycHBICfhJvZ39lBbHZBDQkjj1sZgaxRYDsfxuOsHcxcnEwC1xnkrgy5RVQEQeHs ECwxMVGURBTRCBE4uB2J4hyK4lnH3vYQWwWARWJr0/fgNm8AkYSGx+dYwIZIySwhVHi5/J1YP 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Checked Received: (qmail 29887 invoked from network); 4 Oct 2016 09:49:37 -0000 Received: from smtp.ctxuk.citrix.com (HELO SMTP.EU.CITRIX.COM) (185.25.65.24) by server-9.tower-206.messagelabs.com with RC4-SHA encrypted SMTP; 4 Oct 2016 09:49:37 -0000 X-IronPort-AV: E=Sophos;i="5.31,442,1473120000"; d="scan'208";a="32426433" From: Lars Kurth To: Ian Jackson Thread-Topic: [PATCH v3 4/4] Addressed comments on quorum and security team members Thread-Index: AQHSFcwYQkFVw5dYn0iWfwe1kWXnvKCW2PKAgAFEr4A= Date: Tue, 4 Oct 2016 09:49:35 +0000 Message-ID: References: <1474656929-3528-1-git-send-email-lars.kurth@citrix.com> <1474656929-3528-5-git-send-email-lars.kurth@citrix.com> <22514.34545.829269.902279@mariner.uk.xensource.com> In-Reply-To: <22514.34545.829269.902279@mariner.uk.xensource.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.4.5.141003 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted Content-ID: <6FB3D377E04B2446A9972C1CB00ED074@citrix.com> MIME-Version: 1.0 X-DLP: AMS1 Cc: "xen-devel@lists.xenproject.org" , "win-pv-devel@lists.xenproject.org" , "committers@xenproject.org" , "mirageos-devel@lists.xenproject.org" , "xen-api@lists.xenproject.org" Subject: Re: [MirageOS-devel] [PATCH v3 4/4] Addressed comments on quorum and security team members X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" DQoNCk9uIDAzLzEwLzIwMTYgMTc6MjcsICJJYW4gSmFja3NvbiIgPGlhbi5qYWNrc29uQGV1LmNp dHJpeC5jb20+IHdyb3RlOg0KDQo+TGFycyBLdXJ0aCB3cml0ZXMgKCJbUEFUQ0ggdjMgNC80XSBB ZGRyZXNzZWQgY29tbWVudHMgb24gcXVvcnVtIGFuZA0KPnNlY3VyaXR5IHRlYW0gbWVtYmVycyIp 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mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brMLz-0006YA-6s; Tue, 04 Oct 2016 09:49:39 +0000 Received: from [85.158.139.211] by server-2.bemta-5.messagelabs.com id 4E/55-01972-23B73F75; Tue, 04 Oct 2016 09:49:38 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrBKsWRWlGSWpSXmKPExsWyU9JRQtew+nO 4QftNSYve1rssFn8WJ1p8Wd7AaPF9y2QmBxaPwx+usAQwRrFm5iXlVySwZnxd8IexoEOlomn6 TfYGxjPKXYycHBICfhJvZ39lBbHZBDQkjj1sZgaxRYDsfxuOsHcxcnEwC1xnkrgy5RVQEQeHs ECwxMVGURBTRCBE4uB2J4hyK4lnH3vYQWwWARWJr0/fgNm8AkYSGx+dYwIZIySwhVHi5/J1YP M5BRwlfs+fB1bEKCAr8aVxNVicWUBc4taT+UwQtwlILNlznhnCFpV4+fgf2J2iAnoS8x6+YoO I60icvf6EEcI2kNi6dB8LyG3MApoS63fpQ4y0lLi97hIThK0oMaX7IdRtghInZz4BKxcSUJLY ftkYYgq3xMrPf1gmMErMQnLQLIShs5AMnYVk6CwkQxcwsq5i1ChOLSpLLdI1NNJLKspMzyjJT czM0TU0MNXLTS0uTkxPzUlMKtZLzs/dxAiMUQYg2MHYN8v5EKMkB5OSKG/l60/hQnxJ+SmVGY nFGfFFpTmpxYcYZTg4lCR4LSs/hwsJFqWmp1akZeYAkwVMWoKDR0mE91EFUJq3uCAxtzgzHSJ 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[PATCH v3 4/4] Addressed comments on quorum and security team members Thread-Index: AQHSFcwYQkFVw5dYn0iWfwe1kWXnvKCW2PKAgAFEr4A= Date: Tue, 4 Oct 2016 09:49:35 +0000 Message-ID: References: <1474656929-3528-1-git-send-email-lars.kurth@citrix.com> <1474656929-3528-5-git-send-email-lars.kurth@citrix.com> <22514.34545.829269.902279@mariner.uk.xensource.com> In-Reply-To: <22514.34545.829269.902279@mariner.uk.xensource.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.4.5.141003 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted Content-ID: <6FB3D377E04B2446A9972C1CB00ED074@citrix.com> MIME-Version: 1.0 X-DLP: AMS1 Cc: "xen-devel@lists.xenproject.org" , "win-pv-devel@lists.xenproject.org" , "committers@xenproject.org" , "mirageos-devel@lists.xenproject.org" , "xen-api@lists.xenproject.org" Subject: Re: [MirageOS-devel] [PATCH v3 4/4] Addressed comments on quorum and security team members X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" DQoNCk9uIDAzLzEwLzIwMTYgMTc6MjcsICJJYW4gSmFja3NvbiIgPGlhbi5qYWNrc29uQGV1LmNp dHJpeC5jb20+IHdyb3RlOg0KDQo+TGFycyBLdXJ0aCB3cml0ZXMgKCJbUEFUQ0ggdjMgNC80XSBB ZGRyZXNzZWQgY29tbWVudHMgb24gcXVvcnVtIGFuZA0KPnNlY3VyaXR5IHRlYW0gbWVtYmVycyIp Og0KPj4gTWFpbiBjaGFuZ2VzDQo+PiBMZWFkZXJzaGlwIHRlYW0gZGVjaXNpb25zOiBleHByZXNz IHF1b3J1bSBpbiB0ZXJtcyBvZiArMSB2b3Rlcw0KPj4gU2VjdXJpdHkgVGVhbSBNZW1iZXJzOiBl bGVjdGlvbg0KPj4gUHJvamVjdCBXaWRlIERlY2lzaW9uIE1ha2luZzogbWlub3IgdGV4dCBjaGFu Z2VzDQo+DQo+VGhlIHJlc3VsdGluZyBzZXJpZXMgaXMgYSBsaXR0bGUgb2RkIGJlY2F1c2UgeW91 ciB2MyA0LzQgcGF0Y2ggb25seQ0KPmNoYW5nZXMgdGhpbmdzIHRoYXQgYXJlIGludHJvZHVjZWQg 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"win-pv-devel@lists.xenproject.org" , "committers@xenproject.org" , "mirageos-devel@lists.xenproject.org" , "xen-api@lists.xenproject.org" Subject: Re: [MirageOS-devel] [PATCH v3 4/4] Addressed comments on quorum and security team members X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" TGFycyBLdXJ0aCB3cml0ZXMgKCJSZTogW1BBVENIIHYzIDQvNF0gQWRkcmVzc2VkIGNvbW1lbnRz IG9uIHF1b3J1bSBhbmQgc2VjdXJpdHkgdGVhbSBtZW1iZXJzIik6Cj4gT3JpZ2luYWxseSBJIHdh cyBwbGFubmluZyBvbiBjaGFuZ2luZyB0aGUgcXVvcnVtIHRvIG1hdGNoIHRoZSBvbmUgZm9yCj4g bGVhZGVyc2hpcCB0ZWFtcyBmb3IgY29uc2lzdGVuY3kuCgpBY3R1YWxseSwgdGhhdCdzIHByb2Jh Ymx5IGEgYmV0dGVyIGlkZWEuICBJIHRoaW5rIHdoZW4gSSB3cm90ZSBteQpwcmV2aW91cyBtYWls 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<02A2AB0D-C52F-42A0-B420-B53EC3838237@recoil.org> References: <969bf391-fcbc-9927-f8a0-a7da55f75e43@mehnert.org> To: Hannes Mehnert X-Mailer: Apple Mail (2.3124) Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] load/startup time error handling X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMSBPY3QgMjAxNiwgYXQgMjE6NDksIEhhbm5lcyBNZWhuZXJ0IDxoYW5uZXNAbWVobmVydC5v cmc+IHdyb3RlOgo+IAo+IE9uIDMwLzA5LzIwMTYgMTc6MTMsIEhhbm5lcyBNZWhuZXJ0IHdyb3Rl Ogo+PiBJZiBub2JvZHkgZGlzYWdyZWVzIChhbmQgY29tZXMgdXAgd2l0aCBub24tY29udHJpdmVk IGV4YW1wbGVzKSwgSSdtCj4+IGhhcHB5IHRvIG1hc3NhZ2UgY29kZSBpbnRvIHRoaXMgZGlyZWN0 aW9uIHdpdGhpbiB0aGUgbmV4dCBmZXcgZGF5cy4KPiAKPiBUaGFua3MgZm9yIHRoZSBmZWVkYmFj 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s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=b3XRopkSh0A75S7FAebgHrRHeGJdxu45QxxB0zmS/aE=; b=ybYTiGuEa/1ZpqC5xWCHqWvtoT812VrOPmKTyPwxAYyoVd9pus+wIylfyxJjdtvoKF mzamTpICvS9CA3YtfKEH/G7RXVBHLPV3ACGVkjZtnTahVxd9+5Vl390hooe+wSw+lSJI v2POgMUwmjhP3Oj6tXutctm9M1asaOebBnnW+6aNvum/G+0ceSiSo21LoErFKypaip+L DvsFFRa7lJy2g9lOnvI86bP64QwH2dvLN3zIlEu49i7uZ3UljUI1RXmmuHlUoyEb4NKU i4ywAEH9fcJe4w66DMu5x61HF7V2H+zn518MzwhxGRWcu4vUUvCH814F/Dp3ZlOpsm9i eA8g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=b3XRopkSh0A75S7FAebgHrRHeGJdxu45QxxB0zmS/aE=; b=k/pbFq/yVjjvC6PDBVBCRE1nZdJjQcHRg9Ruj21Q3dOQV3cEzgJiO/N7mjyX9wD9TA ncFaYIQrGmho20SW8FaWet07wFLt7tQFw3v1ojX3bjaPbFGhQHoxwuM0h6OhN6STg6vT mHOrlJ6vvAVpWfXt/enklj85/jntB/PD0XXwGTNKka9jRtEchqG8UlPVLMH6/KsS140C OIfzqLNPuKpK/IhFev9JsXsGV90gwkY+1w7XidoPAwRx2jrGy3z1JruHkqlgQHqeUyLT zeg9+unYSGM0WLUfYXt9vAMVauYzkWab3+NxyC9OfVUxthVxbX2xSXcfYl+aDIwpXLtJ hQYw== X-Gm-Message-State: AA6/9RkKk/ScQkVura39/BMU1NHhpFYA/aw8pC3vL2URGuV+yrYOsm0yecUr7p6JTG/CZ/CZxkezHbOgnLizcQ== X-Received: by 10.25.219.154 with SMTP id t26mr1113547lfi.116.1475580509105; Tue, 04 Oct 2016 04:28:29 -0700 (PDT) MIME-Version: 1.0 Received: by 10.25.198.21 with HTTP; Tue, 4 Oct 2016 04:28:28 -0700 (PDT) In-Reply-To: <02A2AB0D-C52F-42A0-B420-B53EC3838237@recoil.org> References: <969bf391-fcbc-9927-f8a0-a7da55f75e43@mehnert.org> <02A2AB0D-C52F-42A0-B420-B53EC3838237@recoil.org> From: David Scott Date: Tue, 4 Oct 2016 12:28:28 +0100 Message-ID: To: Anil Madhavapeddy Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] load/startup time error handling X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============7438122769908388278==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============7438122769908388278== Content-Type: multipart/alternative; boundary=94eb2c1846a41534fd053e085c81 --94eb2c1846a41534fd053e085c81 Content-Type: text/plain; charset=UTF-8 On Tue, Oct 4, 2016 at 12:04 PM, Anil Madhavapeddy wrote: > On 1 Oct 2016, at 21:49, Hannes Mehnert wrote: > > > > On 30/09/2016 17:13, Hannes Mehnert wrote: > >> If nobody disagrees (and comes up with non-contrived examples), I'm > >> happy to massage code into this direction within the next few days. > > > > Thanks for the feedback, I prepared a bunch of PRs linked from > > https://github.com/mirage/mirage/pull/602 . Lots of CI failures are due > > to the fact that the repository needs to pin another library, thus they > > should solve themselves. I built most of the packages (esp tcpip, > > mirage-block-xen&unix) locally and run the testsuites successfully. > > > > Of special interest might be the PR to mirage-platform and mirage-solo5, > > which catch the exception from startup and emit a log message to > Logs.err. > > > > Since this is a change affecting lots of repositories, it would be great > > to have this change merged rather sooner than later (mirage-dev likely > > needs to be extended with some of these packages). If anyone is up for > > merging & adjusting mirage-dev, feel free to do so, I need some sleep. > > I've started porting some of the fallout from this (e.g. qcow-format), and > immediately ran into some of the other module types such as FLOW.write > returning polymorphic `Error|`Ok pairs. > > So this leads me to wonder if we shouldn't just bite the bullet and port > all these interfaces to use Rresult [1] combinators instead. It does > provide > excellent support for propagating errors, and combinators for mapping > over result types quite conveniently. In the case of connect, if we made > it a `('a,'b) result io` return value we would end up with a nice > ready-made > error string that can be printed, instead of having to catch the Lwt.fail > exception and turn it into a string ourself. > > It would be a lot of breakage in the short term and probably delay the > release by a couple of weeks, but in return it would significantly increase > the succinctness of code (particularly in the filesystem layer). > > Thoughts? > If we're up for a bit of temporary breakage then I'm very keen to move some of the type definitions out of the V1 signatures so we don't have to cut and paste them all over the place. For example with `BLOCK` we have: type error = [ | `Unknown of string (** an undiagnosed error *) | `Unimplemented (** operation not yet implemented in the code *) | `Is_read_only (** you cannot write to a read/only instance *) | `Disconnected (** the device has been previously disconnected *) ] ... type info = { read_write: bool; (** True if we can write, false if read/only *) sector_size: int; (** Octets per sector *) size_sectors: int64; (** Total sectors per device *) } ... Since these types don't refer to any abstract types in the signature I think it's pointless having them there. It would also be good to replace [`Unknown of string] and probably [`Unimplemented] with the [`Msg of string] as recommended by the Rresult docs-- I don't think either error can really be handled. Perhaps [`Disconnected] falls into the same category since it indicates a bug in the application (use after [disconnect]). Of those 4 errors perhaps only [`Is_read_only] is worth keeping since it refers to something in the environment rather than a bug in the code. WDYT? Cheers, Dave > > [1] http://erratique.ch/software/rresult/doc/Rresult.html > > -a > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > -- Dave Scott --94eb2c1846a41534fd053e085c81 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Tue, Oct 4, 2016 at 12:04 PM, Anil Madhavapeddy &l= t;anil@recoil.org&= gt; wrote:
On 1 Oct 2016,= at 21:49, Hannes Mehnert <hannes@= mehnert.org> wrote:
>
> On 30/09/2016 17:13, Hannes Mehnert wrote:
>> If nobody disagrees (and comes up with non-contrived examples), I&= #39;m
>> happy to massage code into this direction within the next few days= .
>
> Thanks for the feedback, I prepared a bunch of PRs linked from
> https://github.com/mirage/mirage/pull/602 .= =C2=A0 Lots of CI failures are due
> to the fact that the repository needs to pin another library, thus the= y
> should solve themselves.=C2=A0 I built most of the packages (esp tcpip= ,
> mirage-block-xen&unix) locally and run the testsuites successfully= .
>
> Of special interest might be the PR to mirage-platform and mirage-solo= 5,
> which catch the exception from startup and emit a log message to Logs.= err.
>
> Since this is a change affecting lots of repositories, it would be gre= at
> to have this change merged rather sooner than later (mirage-dev likely=
> needs to be extended with some of these packages).=C2=A0 If anyone is = up for
> merging & adjusting mirage-dev, feel free to do so, I need some sl= eep.

I've started porting some of the fallout from this (e.g. qcow-fo= rmat), and
immediately ran into some of the other module types such as FLOW.write
returning polymorphic `Error|`Ok pairs.

So this leads me to wonder if we shouldn't just bite the bullet and por= t
all these interfaces to use Rresult [1] combinators instead.=C2=A0 It does = provide
excellent support for propagating errors, and combinators for mapping
over result types quite conveniently.=C2=A0 In the case of connect, if we m= ade
it a `('a,'b) result io` return value we would end up with a nice r= eady-made
error string that can be printed, instead of having to catch the Lwt.fail exception and turn it into a string ourself.

It would be a lot of breakage in the short term and probably delay the
release by a couple of weeks, but in return it would significantly increase=
the succinctness of code (particularly in the filesystem layer).

Thoughts?

If we're up for a bit of = temporary breakage then I'm very keen to move some of the type definiti= ons out of the V1 signatures so we don't have to cut and paste them all= over the place. For example with `BLOCK` we have:

=C2=A0 type error =3D [
=C2=A0 =C2=A0 | `Unknown of string = (** an undiagnosed error *)
=C2=A0 =C2=A0 | `Unimplemented =C2=A0= =C2=A0 (** operation not yet implemented in the code *)
=C2=A0 = =C2=A0 | `Is_read_only =C2=A0 =C2=A0 =C2=A0(** you cannot write to a read/o= nly instance *)
=C2=A0 =C2=A0 | `Disconnected =C2=A0 =C2=A0 =C2= =A0(** the device has been previously disconnected *)
=C2=A0 ]
...
=C2=A0 type info =3D {
=C2=A0 = =C2=A0 read_write: bool; =C2=A0 =C2=A0(** True if we can write, false if re= ad/only *)
=C2=A0 =C2=A0 sector_size: int; =C2=A0 =C2=A0(** Octet= s per sector *)
=C2=A0 =C2=A0 size_sectors: int64; (** Total sect= ors per device *)
=C2=A0 }
...

Since these types don't refer to any abstract types in the signa= ture I think it's pointless having them there.

It would also be good to replace [`Unknown of string] and probably [`Unimp= lemented] with the [`Msg of string] as recommended by the Rresult docs-- I = don't think either error can really be handled. Perhaps [`Disconnected]= falls into the same category since it indicates a bug in the application (= use after [disconnect]). Of those 4 errors perhaps only [`Is_read_only] is = worth keeping since it refers to something in the environment rather than a= bug in the code.

WDYT?

C= heers,
Dave
=C2=A0

[1] http://erratique.ch/software/rresult= /doc/Rresult.html

-a

_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@lists= .xenproject.org
https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel



--
=
Dave Scott
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c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=b3XRopkSh0A75S7FAebgHrRHeGJdxu45QxxB0zmS/aE=; b=k/pbFq/yVjjvC6PDBVBCRE1nZdJjQcHRg9Ruj21Q3dOQV3cEzgJiO/N7mjyX9wD9TA ncFaYIQrGmho20SW8FaWet07wFLt7tQFw3v1ojX3bjaPbFGhQHoxwuM0h6OhN6STg6vT mHOrlJ6vvAVpWfXt/enklj85/jntB/PD0XXwGTNKka9jRtEchqG8UlPVLMH6/KsS140C OIfzqLNPuKpK/IhFev9JsXsGV90gwkY+1w7XidoPAwRx2jrGy3z1JruHkqlgQHqeUyLT zeg9+unYSGM0WLUfYXt9vAMVauYzkWab3+NxyC9OfVUxthVxbX2xSXcfYl+aDIwpXLtJ hQYw== X-Gm-Message-State: AA6/9RkKk/ScQkVura39/BMU1NHhpFYA/aw8pC3vL2URGuV+yrYOsm0yecUr7p6JTG/CZ/CZxkezHbOgnLizcQ== X-Received: by 10.25.219.154 with SMTP id t26mr1113547lfi.116.1475580509105; Tue, 04 Oct 2016 04:28:29 -0700 (PDT) MIME-Version: 1.0 Received: by 10.25.198.21 with HTTP; Tue, 4 Oct 2016 04:28:28 -0700 (PDT) In-Reply-To: <02A2AB0D-C52F-42A0-B420-B53EC3838237@recoil.org> References: <969bf391-fcbc-9927-f8a0-a7da55f75e43@mehnert.org> <02A2AB0D-C52F-42A0-B420-B53EC3838237@recoil.org> From: David Scott Date: Tue, 4 Oct 2016 12:28:28 +0100 Message-ID: To: Anil Madhavapeddy Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] load/startup time error handling X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============7438122769908388278==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============7438122769908388278== Content-Type: multipart/alternative; boundary=94eb2c1846a41534fd053e085c81 --94eb2c1846a41534fd053e085c81 Content-Type: text/plain; charset=UTF-8 On Tue, Oct 4, 2016 at 12:04 PM, Anil Madhavapeddy wrote: > On 1 Oct 2016, at 21:49, Hannes Mehnert wrote: > > > > On 30/09/2016 17:13, Hannes Mehnert wrote: > >> If nobody disagrees (and comes up with non-contrived examples), I'm > >> happy to massage code into this direction within the next few days. > > > > Thanks for the feedback, I prepared a bunch of PRs linked from > > https://github.com/mirage/mirage/pull/602 . Lots of CI failures are due > > to the fact that the repository needs to pin another library, thus they > > should solve themselves. I built most of the packages (esp tcpip, > > mirage-block-xen&unix) locally and run the testsuites successfully. > > > > Of special interest might be the PR to mirage-platform and mirage-solo5, > > which catch the exception from startup and emit a log message to > Logs.err. > > > > Since this is a change affecting lots of repositories, it would be great > > to have this change merged rather sooner than later (mirage-dev likely > > needs to be extended with some of these packages). If anyone is up for > > merging & adjusting mirage-dev, feel free to do so, I need some sleep. > > I've started porting some of the fallout from this (e.g. qcow-format), and > immediately ran into some of the other module types such as FLOW.write > returning polymorphic `Error|`Ok pairs. > > So this leads me to wonder if we shouldn't just bite the bullet and port > all these interfaces to use Rresult [1] combinators instead. It does > provide > excellent support for propagating errors, and combinators for mapping > over result types quite conveniently. In the case of connect, if we made > it a `('a,'b) result io` return value we would end up with a nice > ready-made > error string that can be printed, instead of having to catch the Lwt.fail > exception and turn it into a string ourself. > > It would be a lot of breakage in the short term and probably delay the > release by a couple of weeks, but in return it would significantly increase > the succinctness of code (particularly in the filesystem layer). > > Thoughts? > If we're up for a bit of temporary breakage then I'm very keen to move some of the type definitions out of the V1 signatures so we don't have to cut and paste them all over the place. For example with `BLOCK` we have: type error = [ | `Unknown of string (** an undiagnosed error *) | `Unimplemented (** operation not yet implemented in the code *) | `Is_read_only (** you cannot write to a read/only instance *) | `Disconnected (** the device has been previously disconnected *) ] ... type info = { read_write: bool; (** True if we can write, false if read/only *) sector_size: int; (** Octets per sector *) size_sectors: int64; (** Total sectors per device *) } ... Since these types don't refer to any abstract types in the signature I think it's pointless having them there. It would also be good to replace [`Unknown of string] and probably [`Unimplemented] with the [`Msg of string] as recommended by the Rresult docs-- I don't think either error can really be handled. Perhaps [`Disconnected] falls into the same category since it indicates a bug in the application (use after [disconnect]). Of those 4 errors perhaps only [`Is_read_only] is worth keeping since it refers to something in the environment rather than a bug in the code. WDYT? Cheers, Dave > > [1] http://erratique.ch/software/rresult/doc/Rresult.html > > -a > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > -- Dave Scott --94eb2c1846a41534fd053e085c81 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Tue, Oct 4, 2016 at 12:04 PM, Anil Madhavapeddy &l= t;anil@recoil.org&= gt; wrote:
On 1 Oct 2016,= at 21:49, Hannes Mehnert <hannes@= mehnert.org> wrote:
>
> On 30/09/2016 17:13, Hannes Mehnert wrote:
>> If nobody disagrees (and comes up with non-contrived examples), I&= #39;m
>> happy to massage code into this direction within the next few days= .
>
> Thanks for the feedback, I prepared a bunch of PRs linked from
> https://github.com/mirage/mirage/pull/602 .= =C2=A0 Lots of CI failures are due
> to the fact that the repository needs to pin another library, thus the= y
> should solve themselves.=C2=A0 I built most of the packages (esp tcpip= ,
> mirage-block-xen&unix) locally and run the testsuites successfully= .
>
> Of special interest might be the PR to mirage-platform and mirage-solo= 5,
> which catch the exception from startup and emit a log message to Logs.= err.
>
> Since this is a change affecting lots of repositories, it would be gre= at
> to have this change merged rather sooner than later (mirage-dev likely=
> needs to be extended with some of these packages).=C2=A0 If anyone is = up for
> merging & adjusting mirage-dev, feel free to do so, I need some sl= eep.

I've started porting some of the fallout from this (e.g. qcow-fo= rmat), and
immediately ran into some of the other module types such as FLOW.write
returning polymorphic `Error|`Ok pairs.

So this leads me to wonder if we shouldn't just bite the bullet and por= t
all these interfaces to use Rresult [1] combinators instead.=C2=A0 It does = provide
excellent support for propagating errors, and combinators for mapping
over result types quite conveniently.=C2=A0 In the case of connect, if we m= ade
it a `('a,'b) result io` return value we would end up with a nice r= eady-made
error string that can be printed, instead of having to catch the Lwt.fail exception and turn it into a string ourself.

It would be a lot of breakage in the short term and probably delay the
release by a couple of weeks, but in return it would significantly increase=
the succinctness of code (particularly in the filesystem layer).

Thoughts?

If we're up for a bit of = temporary breakage then I'm very keen to move some of the type definiti= ons out of the V1 signatures so we don't have to cut and paste them all= over the place. For example with `BLOCK` we have:

=C2=A0 type error =3D [
=C2=A0 =C2=A0 | `Unknown of string = (** an undiagnosed error *)
=C2=A0 =C2=A0 | `Unimplemented =C2=A0= =C2=A0 (** operation not yet implemented in the code *)
=C2=A0 = =C2=A0 | `Is_read_only =C2=A0 =C2=A0 =C2=A0(** you cannot write to a read/o= nly instance *)
=C2=A0 =C2=A0 | `Disconnected =C2=A0 =C2=A0 =C2= =A0(** the device has been previously disconnected *)
=C2=A0 ]
...
=C2=A0 type info =3D {
=C2=A0 = =C2=A0 read_write: bool; =C2=A0 =C2=A0(** True if we can write, false if re= ad/only *)
=C2=A0 =C2=A0 sector_size: int; =C2=A0 =C2=A0(** Octet= s per sector *)
=C2=A0 =C2=A0 size_sectors: int64; (** Total sect= ors per device *)
=C2=A0 }
...

Since these types don't refer to any abstract types in the signa= ture I think it's pointless having them there.

It would also be good to replace [`Unknown of string] and probably [`Unimp= lemented] with the [`Msg of string] as recommended by the Rresult docs-- I = don't think either error can really be handled. Perhaps [`Disconnected]= falls into the same category since it indicates a bug in the application (= use after [disconnect]). Of those 4 errors perhaps only [`Is_read_only] is = worth keeping since it refers to something in the environment rather than a= bug in the code.

WDYT?

C= heers,
Dave
=C2=A0

[1] http://erratique.ch/software/rresult= /doc/Rresult.html

-a

_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@lists= .xenproject.org
https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel



--
=
Dave Scott
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Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 MIME-Version: 1.0 In-Reply-To: <2b90eee3-d1cb-aca3-c356-f56587b0ee1e@mehnert.org> Subject: Re: [MirageOS-devel] load/startup time error handling X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTAvMDQvMjAxNiAwNjo1NyBBTSwgSGFubmVzIE1laG5lcnQgd3JvdGU6Cgo+IE9uIDA0LzEw LzIwMTYgMTI6MDQsIEFuaWwgTWFkaGF2YXBlZGR5IHdyb3RlOgo+PiBTbyB0aGlzIGxlYWRzIG1l IHRvIHdvbmRlciBpZiB3ZSBzaG91bGRuJ3QganVzdCBiaXRlIHRoZSBidWxsZXQgYW5kIHBvcnQK Pj4gYWxsIHRoZXNlIGludGVyZmFjZXMgdG8gdXNlIFJyZXN1bHQgWzFdIGNvbWJpbmF0b3JzIGlu c3RlYWQuICBJdCBkb2VzIHByb3ZpZGUKPj4gZXhjZWxsZW50IHN1cHBvcnQgZm9yIHByb3BhZ2F0 aW5nIGVycm9ycywgYW5kIGNvbWJpbmF0b3JzIGZvciBtYXBwaW5nCj4+IG92ZXIgcmVzdWx0IHR5 cGVzIHF1aXRlIGNvbnZlbmllbnRseS4KPiB0cnVlISBJJ20gYWxsIGZvciBpdCAoYW5kIGxpa2Ug RGF2ZSdzIHN1Z2dlc3Rpb24sIGFzIGFscmVhZHkgaW5kaWNhdGVkCj4gaHR0cHM6Ly9naXRodWIu Y29tL21pcmFnZS9taXJhZ2UvaXNzdWVzLzU3MSNpc3N1ZWNvbW1lbnQtMjUxMTI3MzkxKQo+Cj4g RnVuY3Rpb25zIHdoaWNoIHJlc3VsdCBpbiBydW50aW1lIChyYXRoZXIgdGhhbiBzdGFydHVwIHRp bWUpIGVycm9ycywKPiBzdWNoIGFzIEZsb3cuY29ubmVjdCwgcmVhZCwgd3JpdGUsIGV0Yy4sIHNo b3VsZCByZXR1cm4gYSByZXN1bHQgdHlwZS4KCldoaWxlIHdlJ3JlIHJlcGxpY2F0aW5nIG91ciBy ZWFjdGppLCBJJ20gYWxzbyBpbiBmYXZvci4gIEknbSBjdXJyZW50bHkgCmluIHRoZSBtaWRkbGUg b2YgYXNzZW1ibGluZyBQUnMgZm9yIHJlbW92aW5nIGlkIHR5cGVzLCBidXQgSSdsbCBiZSBvbiBh IApsb25nIGZsaWdodCBmbGlnaHQgdG9tb3Jyb3cgYW5kIG1pZ2h0IGJlIGFibGUgdG8gcHV0IHRv Z2V0aGVyIGEgCmByZXN1bHRgLXkgYHRjcGlwYCB0aGVuIChwb3dlciBhdmFpbGFiaWxpdHkgcGVy bWl0dGluZykuCgo+PiBJbiB0aGUgY2FzZSBvZiBjb25uZWN0LCBpZiB3ZSBtYWRlIGl0IGEgYCgn YSwnYikgcmVzdWx0IGlvYCByZXR1cm4gdmFsdWUgd2UKPj4gd291bGQgZW5kIHVwIHdpdGggYSBu aWNlIHJlYWR5LW1hZGUgZXJyb3Igc3RyaW5nIHRoYXQgY2FuIGJlIHByaW50ZWQsCj4gZXhhY3Rs eSBob3cgd291bGQgd2UgZ2V0IHRoYXQ/ICBvbmUgd2F5IGlzIGJ5IGRlZmluaW5nIGVycm9yIHR5 cGVzCj4gdG9nZXRoZXIgd2l0aCBwcmV0dHkgcHJpbnRlcnMgZm9yIGVhY2gsIGJ1dCBwbGVhc2Ug bG9vayBpbnRvIHRoZSBjb2RlCj4gZnVuY3RvcmlhIGdlbmVyYXRlcyAtLSBJICh3aGVuIGxvb2tp bmcgd2l0aCBNaW5keSBvbiB0aGUgY29kZSkgY291bGRuJ3QKPiBmaW5kIGEgd2F5IHRvIHJldGFp biB0aGUgYWN0dWFsIGVycm9yIHR5cGUgdG8gY2FsbCB0aGUgY29ycmVjdCBwcmV0dHkKPiBwcmlu dGVyLiAgVGhvbWFzJyBwcm9wb3NhbCBhZGRlZCBtb3JlIG1hZ2ljIGludG8gdGhlIG1pcmFnZSB0 b29sIChlLmcuCj4gaHR0cHM6Ly9naXRodWIuY29tL3RhbGV4NS9taXJhZ2UvY29tbWl0LzBkNTEw YzY2Mjc4MzViM2RmNzkyZGI3YmMzZmIyY2JhMDgyZGU1NDApLAo+IHdoaWNoIEknZCByZWFsbHkg bGlrZSB0byBhdm9pZCAtLSBubyBuZWVkIHRvIHB1dCBtb3JlIGRvbWFpbiBrbm93bGVkZ2UKPiBp bnRvIHRoYXQgdG9vbCwgaXQgYWxyZWFkeSBoYXMgdG9vIG11Y2guCj4KCkknbSBoYXBweSB0byBz aGFyZSBhY3F1aXJlZCB3aXNkb20gb24gYXBwcm9hY2hlcyB0byB0aGlzIHRoYXQgZG9uJ3Qgd29y ayAKd2l0aCBzb21lb25lIHdobyB3YW50cyB0byB0YWtlIGl0IHVwLCBidXQgSSdtIG5vdCB3aWxs aW5nIHRvIHB1dCBhbnkgCm1vcmUgdGltZSBpbnRvIGF0dGVtcHRpbmcgdG8gZ2V0IHRoaXMgdG8g d29yayBteXNlbGYuICBJJ20gYWxzbyB2ZXJ5IApoYXBweSB3aXRoIEhhbm5lcydzIHNvbHV0aW9u LCB3aGljaCBpcyBub3cgbWVyZ2VkLCBmb3IgZ2V0dGluZyB1cyBiZXR0ZXIgCmNvbm5lY3QtdGlt ZSBlcnJvciByZXBvcnRpbmcuCgo+PiBpbnN0ZWFkIG9mIGhhdmluZyB0byBjYXRjaCB0aGUgTHd0 LmZhaWwgZXhjZXB0aW9uIGFuZCB0dXJuIGl0IGludG8gYSBzdHJpbmcgb3Vyc2VsZi4KPiBBcyBt ZW50aW9uZWQgaW4gbXkgaW5pdGlhbCBtYWlsOiBpZiB0aGVyZSBpcyBhbiBleGFtcGxlIHdoZXJl IHdlIHdhbnQgdG8KPiBwcm9ncmFtbWF0aWNhbGx5IGhhbmRsZSAiY29ubmVjdCIgZXJyb3JzLCB3 ZSBzaG91bGQgaGF2ZSBhIHJlc3VsdCB0eXBlCj4gZm9yIGNvbm5lY3QuICBTbyBmYXIgSSBoYXZl IG5vdCBzZWVuIHN1Y2ggYW4gZXhhbXBsZS4gIEhhdmUgeW91IHNlZW4KPiBvbmU/ICBJcyB0aGVy ZSBvbmUgaW4gcWNvdy1mb3JtYXQ/CgpUaGVyZSdzIGEgbGFyZ2VyIGRpc2N1c3Npb24gdG8gYmUg aGFkIGFib3V0IHRoZSBwcm9wZXIgc2NvcGUgb2YgYmVoYXZpb3IgCnRvIGJlIGltcGxlbWVudGVk IGluIGBjb25uZWN0YCwgYnV0IG15IGludHVpdGlvbiBpcyB0aGF0IGl0IHNob3VsZCBmYWlsIApj b21wbGV0ZWx5IGFuZCBlYXJseSByYXRoZXIgdGhhbiBhbGxvd2luZyB0aGUgdW5pa2VybmVsIHRv IGNvbnRpbnVlIGluIGEgCnBvdGVudGlhbGx5IGRhbmdlcm91cyBvciBpbmNvbXBsZXRlIHN0YXRl LgoKLU1pbmR5CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpNaXJhZ2VPUy1kZXZlbCBtYWlsaW5nIGxpc3QKTWlyYWdlT1MtZGV2ZWxAbGlzdHMueGVucHJv amVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9jZ2ktYmluL21haWxtYW4vbGlz dGluZm8vbWlyYWdlb3MtZGV2ZWwK From mirageos-devel-bounces@lists.xenproject.org Tue Oct 04 12:05:07 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 04 Oct 2016 12:05:07 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brOT2-0000Eu-NO; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 26967 invoked from network); 4 Oct 2016 12:05:01 -0000 Received: from relay6-d.mail.gandi.net (HELO relay6-d.mail.gandi.net) (217.70.183.198) by server-8.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 4 Oct 2016 12:05:01 -0000 Received: from mfilter22-d.gandi.net (mfilter22-d.gandi.net [217.70.178.150]) by relay6-d.mail.gandi.net (Postfix) with ESMTP id 98DB2FB8CC for ; Tue, 4 Oct 2016 14:05:01 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at mfilter22-d.gandi.net Received: from relay6-d.mail.gandi.net ([IPv6:::ffff:217.70.183.198]) by mfilter22-d.gandi.net (mfilter22-d.gandi.net [::ffff:10.0.15.180]) (amavisd-new, port 10024) with ESMTP id x6Ki0rpcmTan for ; Tue, 4 Oct 2016 14:04:59 +0200 (CEST) X-Originating-IP: 198.27.60.162 Received: from [10.137.3.11] (unknown [198.27.60.162]) (Authenticated sender: guybrush@somerandomidiot.com) by relay6-d.mail.gandi.net (Postfix) with ESMTPSA id 26177FB8C7 for ; Tue, 4 Oct 2016 14:04:58 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: <969bf391-fcbc-9927-f8a0-a7da55f75e43@mehnert.org> <02A2AB0D-C52F-42A0-B420-B53EC3838237@recoil.org> <2b90eee3-d1cb-aca3-c356-f56587b0ee1e@mehnert.org> From: Mindy Message-ID: Date: Tue, 4 Oct 2016 07:04:58 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 MIME-Version: 1.0 In-Reply-To: <2b90eee3-d1cb-aca3-c356-f56587b0ee1e@mehnert.org> Subject: Re: [MirageOS-devel] load/startup time error handling X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTAvMDQvMjAxNiAwNjo1NyBBTSwgSGFubmVzIE1laG5lcnQgd3JvdGU6Cgo+IE9uIDA0LzEw LzIwMTYgMTI6MDQsIEFuaWwgTWFkaGF2YXBlZGR5IHdyb3RlOgo+PiBTbyB0aGlzIGxlYWRzIG1l IHRvIHdvbmRlciBpZiB3ZSBzaG91bGRuJ3QganVzdCBiaXRlIHRoZSBidWxsZXQgYW5kIHBvcnQK Pj4gYWxsIHRoZXNlIGludGVyZmFjZXMgdG8gdXNlIFJyZXN1bHQgWzFdIGNvbWJpbmF0b3JzIGlu c3RlYWQuICBJdCBkb2VzIHByb3ZpZGUKPj4gZXhjZWxsZW50IHN1cHBvcnQgZm9yIHByb3BhZ2F0 aW5nIGVycm9ycywgYW5kIGNvbWJpbmF0b3JzIGZvciBtYXBwaW5nCj4+IG92ZXIgcmVzdWx0IHR5 cGVzIHF1aXRlIGNvbnZlbmllbnRseS4KPiB0cnVlISBJJ20gYWxsIGZvciBpdCAoYW5kIGxpa2Ug RGF2ZSdzIHN1Z2dlc3Rpb24sIGFzIGFscmVhZHkgaW5kaWNhdGVkCj4gaHR0cHM6Ly9naXRodWIu Y29tL21pcmFnZS9taXJhZ2UvaXNzdWVzLzU3MSNpc3N1ZWNvbW1lbnQtMjUxMTI3MzkxKQo+Cj4g RnVuY3Rpb25zIHdoaWNoIHJlc3VsdCBpbiBydW50aW1lIChyYXRoZXIgdGhhbiBzdGFydHVwIHRp bWUpIGVycm9ycywKPiBzdWNoIGFzIEZsb3cuY29ubmVjdCwgcmVhZCwgd3JpdGUsIGV0Yy4sIHNo b3VsZCByZXR1cm4gYSByZXN1bHQgdHlwZS4KCldoaWxlIHdlJ3JlIHJlcGxpY2F0aW5nIG91ciBy ZWFjdGppLCBJJ20gYWxzbyBpbiBmYXZvci4gIEknbSBjdXJyZW50bHkgCmluIHRoZSBtaWRkbGUg b2YgYXNzZW1ibGluZyBQUnMgZm9yIHJlbW92aW5nIGlkIHR5cGVzLCBidXQgSSdsbCBiZSBvbiBh IApsb25nIGZsaWdodCBmbGlnaHQgdG9tb3Jyb3cgYW5kIG1pZ2h0IGJlIGFibGUgdG8gcHV0IHRv Z2V0aGVyIGEgCmByZXN1bHRgLXkgYHRjcGlwYCB0aGVuIChwb3dlciBhdmFpbGFiaWxpdHkgcGVy bWl0dGluZykuCgo+PiBJbiB0aGUgY2FzZSBvZiBjb25uZWN0LCBpZiB3ZSBtYWRlIGl0IGEgYCgn YSwnYikgcmVzdWx0IGlvYCByZXR1cm4gdmFsdWUgd2UKPj4gd291bGQgZW5kIHVwIHdpdGggYSBu aWNlIHJlYWR5LW1hZGUgZXJyb3Igc3RyaW5nIHRoYXQgY2FuIGJlIHByaW50ZWQsCj4gZXhhY3Rs eSBob3cgd291bGQgd2UgZ2V0IHRoYXQ/ICBvbmUgd2F5IGlzIGJ5IGRlZmluaW5nIGVycm9yIHR5 cGVzCj4gdG9nZXRoZXIgd2l0aCBwcmV0dHkgcHJpbnRlcnMgZm9yIGVhY2gsIGJ1dCBwbGVhc2Ug bG9vayBpbnRvIHRoZSBjb2RlCj4gZnVuY3RvcmlhIGdlbmVyYXRlcyAtLSBJICh3aGVuIGxvb2tp bmcgd2l0aCBNaW5keSBvbiB0aGUgY29kZSkgY291bGRuJ3QKPiBmaW5kIGEgd2F5IHRvIHJldGFp biB0aGUgYWN0dWFsIGVycm9yIHR5cGUgdG8gY2FsbCB0aGUgY29ycmVjdCBwcmV0dHkKPiBwcmlu dGVyLiAgVGhvbWFzJyBwcm9wb3NhbCBhZGRlZCBtb3JlIG1hZ2ljIGludG8gdGhlIG1pcmFnZSB0 b29sIChlLmcuCj4gaHR0cHM6Ly9naXRodWIuY29tL3RhbGV4NS9taXJhZ2UvY29tbWl0LzBkNTEw YzY2Mjc4MzViM2RmNzkyZGI3YmMzZmIyY2JhMDgyZGU1NDApLAo+IHdoaWNoIEknZCByZWFsbHkg bGlrZSB0byBhdm9pZCAtLSBubyBuZWVkIHRvIHB1dCBtb3JlIGRvbWFpbiBrbm93bGVkZ2UKPiBp bnRvIHRoYXQgdG9vbCwgaXQgYWxyZWFkeSBoYXMgdG9vIG11Y2guCj4KCkknbSBoYXBweSB0byBz aGFyZSBhY3F1aXJlZCB3aXNkb20gb24gYXBwcm9hY2hlcyB0byB0aGlzIHRoYXQgZG9uJ3Qgd29y ayAKd2l0aCBzb21lb25lIHdobyB3YW50cyB0byB0YWtlIGl0IHVwLCBidXQgSSdtIG5vdCB3aWxs aW5nIHRvIHB1dCBhbnkgCm1vcmUgdGltZSBpbnRvIGF0dGVtcHRpbmcgdG8gZ2V0IHRoaXMgdG8g d29yayBteXNlbGYuICBJJ20gYWxzbyB2ZXJ5IApoYXBweSB3aXRoIEhhbm5lcydzIHNvbHV0aW9u LCB3aGljaCBpcyBub3cgbWVyZ2VkLCBmb3IgZ2V0dGluZyB1cyBiZXR0ZXIgCmNvbm5lY3QtdGlt ZSBlcnJvciByZXBvcnRpbmcuCgo+PiBpbnN0ZWFkIG9mIGhhdmluZyB0byBjYXRjaCB0aGUgTHd0 LmZhaWwgZXhjZXB0aW9uIGFuZCB0dXJuIGl0IGludG8gYSBzdHJpbmcgb3Vyc2VsZi4KPiBBcyBt ZW50aW9uZWQgaW4gbXkgaW5pdGlhbCBtYWlsOiBpZiB0aGVyZSBpcyBhbiBleGFtcGxlIHdoZXJl IHdlIHdhbnQgdG8KPiBwcm9ncmFtbWF0aWNhbGx5IGhhbmRsZSAiY29ubmVjdCIgZXJyb3JzLCB3 ZSBzaG91bGQgaGF2ZSBhIHJlc3VsdCB0eXBlCj4gZm9yIGNvbm5lY3QuICBTbyBmYXIgSSBoYXZl IG5vdCBzZWVuIHN1Y2ggYW4gZXhhbXBsZS4gIEhhdmUgeW91IHNlZW4KPiBvbmU/ICBJcyB0aGVy ZSBvbmUgaW4gcWNvdy1mb3JtYXQ/CgpUaGVyZSdzIGEgbGFyZ2VyIGRpc2N1c3Npb24gdG8gYmUg aGFkIGFib3V0IHRoZSBwcm9wZXIgc2NvcGUgb2YgYmVoYXZpb3IgCnRvIGJlIGltcGxlbWVudGVk IGluIGBjb25uZWN0YCwgYnV0IG15IGludHVpdGlvbiBpcyB0aGF0IGl0IHNob3VsZCBmYWlsIApj b21wbGV0ZWx5IGFuZCBlYXJseSByYXRoZXIgdGhhbiBhbGxvd2luZyB0aGUgdW5pa2VybmVsIHRv IGNvbnRpbnVlIGluIGEgCnBvdGVudGlhbGx5IGRhbmdlcm91cyBvciBpbmNvbXBsZXRlIHN0YXRl LgoKLU1pbmR5CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpNaXJhZ2VPUy1kZXZlbCBtYWlsaW5nIGxpc3QKTWlyYWdlT1MtZGV2ZWxAbGlzdHMueGVucHJv amVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9jZ2ktYmluL21haWxtYW4vbGlz dGluZm8vbWlyYWdlb3MtZGV2ZWwK From mirageos-devel-bounces@lists.xenproject.org Tue Oct 04 20:10:32 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 04 Oct 2016 20:10:32 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brW2e-0008Lt-2Y; 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Received: from exchange.cornell.edu (sf-e2013-04.exchange.cornell.edu [10.22.40.51]) by limerock02.mail.cornell.edu (8.14.4/8.14.4_cu) with ESMTP id u94KADdV000366 for ; Tue, 4 Oct 2016 16:10:15 -0400 Received: from sf-e2013-07.exchange.cornell.edu (10.22.40.54) by sf-e2013-04.exchange.cornell.edu (10.22.40.51) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Tue, 4 Oct 2016 16:10:11 -0400 Received: from NAM01-BN3-obe.outbound.protection.outlook.com (216.32.180.184) by sf-e2013-07.exchange.cornell.edu (10.22.40.54) with Microsoft SMTP Server (TLS) id 15.0.1210.3 via Frontend Transport; Tue, 4 Oct 2016 16:10:11 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cornellprod.onmicrosoft.com; s=selector1-cornell-edu; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=zEDZH2z+3Q/MsrCu/K2l6FzbJUQWE9j0jFf5m5V+8bg=; b=ahph9DIvlP+c/yO9asLfTFt+XK2ocjToMIBWbjw/GPy2gXXRsLxh1TVNa5yf0JbjnU7Erd5pep1CIivs9IeytoWPc/zG+ognueQkBN3VHvMovrNlO7SsnEOC0AOZ64SeUrxa8C6excOblqsh+bfY1I8xNVoIKKj3SOyh8zbz1u4= Received: from CY1PR0401MB1629.namprd04.prod.outlook.com (10.163.19.23) by CY1PR0401MB1630.namprd04.prod.outlook.com (10.163.19.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.649.16; Tue, 4 Oct 2016 20:10:11 +0000 Received: from CY1PR0401MB1629.namprd04.prod.outlook.com ([10.163.19.23]) by CY1PR0401MB1629.namprd04.prod.outlook.com ([10.163.19.23]) with mapi id 15.01.0649.021; Tue, 4 Oct 2016 20:10:11 +0000 From: Eugene Bagdasaryan To: "mirageos-devel@lists.xenproject.org" Thread-Topic: Raspberry Pi 3 installation Thread-Index: AdIee0r3Kk2t1F1KQDy4yt/MP/XHzQ== Date: Tue, 4 Oct 2016 20:10:11 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [128.84.217.161] x-ms-office365-filtering-correlation-id: 0bea5026-f4cc-4b1f-fe12-08d3ec927278 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:CY1PR0401MB1630; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(21748063052155); x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(6040176)(601004)(2401047)(5005006)(8121501046)(3002001)(10201501046); SRVR:CY1PR0401MB1630; BCL:0; PCL:0; RULEID:; SRVR:CY1PR0401MB1630; x-forefront-prvs: 00851CA28B received-spf: None (protection.outlook.com: cornell.edu does not designate permitted sender hosts) spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Oct 2016 20:10:11.7943 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5d7e4366-1b9b-45cf-8e79-b14b27df46e1 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR0401MB1630 X-OriginatorOrg: cornell.edu X-ORG-HybridRouting: bb3d338812462cec7daf99b529610048 X-ORG-MsgSource: exchange X-ORG-RouteOnPrem: True X-PMX-CORNELL-AUTH-RESULTS: dkim-out=pass; Subject: [MirageOS-devel] Raspberry Pi 3 installation X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============4855388750438787297==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============4855388750438787297== Content-Language: en-US Content-Type: multipart/alternative; boundary="_000_CY1PR0401MB162929F3F120CFC23E504FBFEEC50CY1PR0401MB1629_" --_000_CY1PR0401MB162929F3F120CFC23E504FBFEEC50CY1PR0401MB1629_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hey guys I have found some email threads on Raspberry Pi 3 installation, but so far = haven't found any useful guide for installing Xen or Kvm on RPI3 do you hav= e any guides for this? Thank you, Eugene --_000_CY1PR0401MB162929F3F120CFC23E504FBFEEC50CY1PR0401MB1629_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hey guys

 

I have found some email threads on Raspberry Pi 3 in= stallation, but so far haven’t found any useful guide for installing = Xen or Kvm on RPI3 do you have any guides for this?

 

 

Thank you,

Eugene

 

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Received: from exchange.cornell.edu (sf-e2013-04.exchange.cornell.edu [10.22.40.51]) by limerock02.mail.cornell.edu (8.14.4/8.14.4_cu) with ESMTP id u94KADdV000366 for ; Tue, 4 Oct 2016 16:10:15 -0400 Received: from sf-e2013-07.exchange.cornell.edu (10.22.40.54) by sf-e2013-04.exchange.cornell.edu (10.22.40.51) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Tue, 4 Oct 2016 16:10:11 -0400 Received: from NAM01-BN3-obe.outbound.protection.outlook.com (216.32.180.184) by sf-e2013-07.exchange.cornell.edu (10.22.40.54) with Microsoft SMTP Server (TLS) id 15.0.1210.3 via Frontend Transport; Tue, 4 Oct 2016 16:10:11 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cornellprod.onmicrosoft.com; s=selector1-cornell-edu; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=zEDZH2z+3Q/MsrCu/K2l6FzbJUQWE9j0jFf5m5V+8bg=; b=ahph9DIvlP+c/yO9asLfTFt+XK2ocjToMIBWbjw/GPy2gXXRsLxh1TVNa5yf0JbjnU7Erd5pep1CIivs9IeytoWPc/zG+ognueQkBN3VHvMovrNlO7SsnEOC0AOZ64SeUrxa8C6excOblqsh+bfY1I8xNVoIKKj3SOyh8zbz1u4= Received: from CY1PR0401MB1629.namprd04.prod.outlook.com (10.163.19.23) by CY1PR0401MB1630.namprd04.prod.outlook.com (10.163.19.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.649.16; Tue, 4 Oct 2016 20:10:11 +0000 Received: from CY1PR0401MB1629.namprd04.prod.outlook.com ([10.163.19.23]) by CY1PR0401MB1629.namprd04.prod.outlook.com ([10.163.19.23]) with mapi id 15.01.0649.021; Tue, 4 Oct 2016 20:10:11 +0000 From: Eugene Bagdasaryan To: "mirageos-devel@lists.xenproject.org" Thread-Topic: Raspberry Pi 3 installation Thread-Index: AdIee0r3Kk2t1F1KQDy4yt/MP/XHzQ== Date: Tue, 4 Oct 2016 20:10:11 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [128.84.217.161] x-ms-office365-filtering-correlation-id: 0bea5026-f4cc-4b1f-fe12-08d3ec927278 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:CY1PR0401MB1630; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(21748063052155); x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(6040176)(601004)(2401047)(5005006)(8121501046)(3002001)(10201501046); SRVR:CY1PR0401MB1630; BCL:0; PCL:0; RULEID:; SRVR:CY1PR0401MB1630; x-forefront-prvs: 00851CA28B received-spf: None (protection.outlook.com: cornell.edu does not designate permitted sender hosts) spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Oct 2016 20:10:11.7943 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5d7e4366-1b9b-45cf-8e79-b14b27df46e1 X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR0401MB1630 X-OriginatorOrg: cornell.edu X-ORG-HybridRouting: bb3d338812462cec7daf99b529610048 X-ORG-MsgSource: exchange X-ORG-RouteOnPrem: True X-PMX-CORNELL-AUTH-RESULTS: dkim-out=pass; Subject: [MirageOS-devel] Raspberry Pi 3 installation X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============4855388750438787297==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============4855388750438787297== Content-Language: en-US Content-Type: multipart/alternative; boundary="_000_CY1PR0401MB162929F3F120CFC23E504FBFEEC50CY1PR0401MB1629_" --_000_CY1PR0401MB162929F3F120CFC23E504FBFEEC50CY1PR0401MB1629_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hey guys I have found some email threads on Raspberry Pi 3 installation, but so far = haven't found any useful guide for installing Xen or Kvm on RPI3 do you hav= e any guides for this? Thank you, Eugene --_000_CY1PR0401MB162929F3F120CFC23E504FBFEEC50CY1PR0401MB1629_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hey guys

 

I have found some email threads on Raspberry Pi 3 in= stallation, but so far haven’t found any useful guide for installing = Xen or Kvm on RPI3 do you have any guides for this?

 

 

Thank you,

Eugene

 

--_000_CY1PR0401MB162929F3F120CFC23E504FBFEEC50CY1PR0401MB1629_-- --===============4855388750438787297== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============4855388750438787297==-- From mirageos-devel-bounces@lists.xenproject.org Wed Oct 05 12:37:28 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 05 Oct 2016 12:37:28 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brlRh-0000j5-KJ; Wed, 05 Oct 2016 12:37:13 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brlRg-0000iz-F2 for mirageos-devel@lists.xenproject.org; Wed, 05 Oct 2016 12:37:12 +0000 Received: from [193.109.254.147] by server-8.bemta-6.messagelabs.com id 75/7A-28497-7F3F4F75; Wed, 05 Oct 2016 12:37:11 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrHIsWRWlGSWpSXmKPExsXSnM/Rq/vt85d wg29N2ha9rXdZHBg9Dn+4whLAGMWamZeUX5HAmnH9vWnBTsmK6W862RoY34t3MXJySAgoSmxt 3MjcxcgBZFtKvFpT0MXIxSEk8IxJYn3rdSYIZz6jxL67DSwQDTkSExcfYoewCyW+bNnICmLzC ghKnJz5BKxGSMBL4vKL22BxNgF1if7dLWwgNouAisTs+6eh5iRKzFl0nR2iN0DiZt9csHphgW SJp7ubGEFsEaDeZafug9nMQDNPtr1ihqjRkfj75jfjBEaBWUhWz0JSNgvoH2ag9vXzhCDCahK 3t11lh7C1JZYtfM28gJF1FaNGcWpRWWqRrpGlXlJRZnpGSW5iZo6uoYGZXm5qcXFiempOYlKx XnJ+7iZGYCgzAMEOxgOLAg8xSnIwKYnyvj/5JVyILyk/pTIjsTgjvqg0J7X4EKMMB4eSBG/nJ 6CcYFFqempFWmYOMKpg0hIcPEoivBs+AqV5iwsSc4sz0yFSpxiNOY7NvbGWiWPL1HtrmYRY8v LzUqXEeQ+CTBIAKc0ozYMbBIv2S4yyUsK8jECnCfEUpBblZpagyr9iFOdgVBLm3Q0yhSczrwR u3yugU5iATslfCnZKSSJCSqqB0WPfKZWCxYrPpR+GLMhdHzg1593FUp79x2+aTj02mzf1+tS6 Tp0t3T/5RI74SgUWdyj+aT0tkmT/d6eo6va/16Obrzmx3mILvHfSp6/ReHYRQ6mU4OSWDSV3P m3epaJ795buqYOKP69dYhaewdG4+fK1GrOrr1Z0PnlsL9JTGqG6ymBT9ut1s5VYijMSDbWYi4 oTAfePOX/xAgAA X-Env-Sender: gg417@hermes.cam.ac.uk X-Msg-Ref: server-8.tower-27.messagelabs.com!1475671030!53137100!1 X-Originating-IP: [131.111.8.141] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMTMxLjExMS44LjE0MSA9PiAxNTQ4NjI=\n X-StarScan-Received: X-StarScan-Version: 8.84; banners=-,-,- X-VirusChecked: Checked Received: (qmail 56442 invoked from network); 5 Oct 2016 12:37:10 -0000 Received: from ppsw-41.csi.cam.ac.uk (HELO ppsw-41.csi.cam.ac.uk) (131.111.8.141) by server-8.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 5 Oct 2016 12:37:10 -0000 X-Cam-AntiVirus: no malware found X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/ Received: from mail-wm0-f54.google.com ([74.125.82.54]:35974) by ppsw-41.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.159]:587) with esmtpsa (PLAIN:gg417) (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) id 1brlRe-0001Eh-R3 (Exim 4.86_36-e07b163) for mirageos-devel@lists.xenproject.org (return-path ); Wed, 05 Oct 2016 13:37:10 +0100 Received: by mail-wm0-f54.google.com with SMTP id k125so265142474wma.1 for ; Wed, 05 Oct 2016 05:37:07 -0700 (PDT) X-Gm-Message-State: AA6/9RkZc/0Np+GtLE083tWr09P3TV2zvX+nH5FnO7K8BiCIYmfVc1tGyTKbAHZOHuHyLUfu0g6gGPUJScthGw== X-Received: by 10.28.107.22 with SMTP id g22mr8271838wmc.31.1475671027025; Wed, 05 Oct 2016 05:37:07 -0700 (PDT) MIME-Version: 1.0 Received: by 10.28.152.150 with HTTP; Wed, 5 Oct 2016 05:36:36 -0700 (PDT) From: Gemma Gordon Date: Wed, 5 Oct 2016 13:36:36 +0100 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel@lists.xenproject.org Subject: [MirageOS-devel] MirageOS fortnightly catchup - Wednesday 5th October 4pm UK time (UTC+1) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============8234772127727923976==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============8234772127727923976== Content-Type: multipart/alternative; boundary=001a1146563c5f0e92053e1d6f0d --001a1146563c5f0e92053e1d6f0d Content-Type: text/plain; charset=UTF-8 Hi all, We'll be using IRC again so please join #mirage on Freenode. IRC logs from the last session are currently up at: http://canopy.mirage.io/irclogs/20-04-2016 and this session will also be logged at: http://canopy.mirage.io/irclogs The agenda for the meeting is at: https://github.com/mirage/mirage-www/wiki/Call-Agenda Please read over the agenda and add anything you'd like to talk about to the wiki. See you later! --001a1146563c5f0e92053e1d6f0d Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi all,

We'll be using=C2=A0IRC=C2=A0again so please jo= in #mi= rage= =C2=A0on Freenode.
IRC= =C2=A0= logs from the last session are currently up at:
http://canopy.mirage.io/irclogs/2= 0-04-2016
and this session will also be = logged at:
http://cano= py.mirage.io/irclogs

<= span style=3D"font-family:arial,sans-serif;font-size:12.8px">The agenda for= the meeting is at:
https://github.com/mirage/mirage-www/wiki/Call-Age= nda

Please read over the agenda and add anything you'd like to = talk about to the wiki.=C2=A0 See you later!
--001a1146563c5f0e92053e1d6f0d-- --===============8234772127727923976== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============8234772127727923976==-- From mirageos-devel-bounces@lists.xenproject.org Wed Oct 05 12:37:28 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 05 Oct 2016 12:37:28 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brlRh-0000j5-KJ; Wed, 05 Oct 2016 12:37:13 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brlRg-0000iz-F2 for mirageos-devel@lists.xenproject.org; Wed, 05 Oct 2016 12:37:12 +0000 Received: from [193.109.254.147] by server-8.bemta-6.messagelabs.com id 75/7A-28497-7F3F4F75; Wed, 05 Oct 2016 12:37:11 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrHIsWRWlGSWpSXmKPExsXSnM/Rq/vt85d wg29N2ha9rXdZHBg9Dn+4whLAGMWamZeUX5HAmnH9vWnBTsmK6W862RoY34t3MXJySAgoSmxt 3MjcxcgBZFtKvFpT0MXIxSEk8IxJYn3rdSYIZz6jxL67DSwQDTkSExcfYoewCyW+bNnICmLzC ghKnJz5BKxGSMBL4vKL22BxNgF1if7dLWwgNouAisTs+6eh5iRKzFl0nR2iN0DiZt9csHphgW SJp7ubGEFsEaDeZafug9nMQDNPtr1ihqjRkfj75jfjBEaBWUhWz0JSNgvoH2ag9vXzhCDCahK 3t11lh7C1JZYtfM28gJF1FaNGcWpRWWqRrpGlXlJRZnpGSW5iZo6uoYGZXm5qcXFiempOYlKx XnJ+7iZGYCgzAMEOxgOLAg8xSnIwKYnyvj/5JVyILyk/pTIjsTgjvqg0J7X4EKMMB4eSBG/nJ 6CcYFFqempFWmYOMKpg0hIcPEoivBs+AqV5iwsSc4sz0yFSpxiNOY7NvbGWiWPL1HtrmYRY8v LzUqXEeQ+CTBIAKc0ozYMbBIv2S4yyUsK8jECnCfEUpBblZpagyr9iFOdgVBLm3Q0yhSczrwR u3yugU5iATslfCnZKSSJCSqqB0WPfKZWCxYrPpR+GLMhdHzg1593FUp79x2+aTj02mzf1+tS6 Tp0t3T/5RI74SgUWdyj+aT0tkmT/d6eo6va/16Obrzmx3mILvHfSp6/ReHYRQ6mU4OSWDSV3P m3epaJ795buqYOKP69dYhaewdG4+fK1GrOrr1Z0PnlsL9JTGqG6ymBT9ut1s5VYijMSDbWYi4 oTAfePOX/xAgAA X-Env-Sender: gg417@hermes.cam.ac.uk X-Msg-Ref: server-8.tower-27.messagelabs.com!1475671030!53137100!1 X-Originating-IP: [131.111.8.141] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMTMxLjExMS44LjE0MSA9PiAxNTQ4NjI=\n X-StarScan-Received: X-StarScan-Version: 8.84; banners=-,-,- X-VirusChecked: Checked Received: (qmail 56442 invoked from network); 5 Oct 2016 12:37:10 -0000 Received: from ppsw-41.csi.cam.ac.uk (HELO ppsw-41.csi.cam.ac.uk) (131.111.8.141) by server-8.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 5 Oct 2016 12:37:10 -0000 X-Cam-AntiVirus: no malware found X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/ Received: from mail-wm0-f54.google.com ([74.125.82.54]:35974) by ppsw-41.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.159]:587) with esmtpsa (PLAIN:gg417) (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) id 1brlRe-0001Eh-R3 (Exim 4.86_36-e07b163) for mirageos-devel@lists.xenproject.org (return-path ); Wed, 05 Oct 2016 13:37:10 +0100 Received: by mail-wm0-f54.google.com with SMTP id k125so265142474wma.1 for ; Wed, 05 Oct 2016 05:37:07 -0700 (PDT) X-Gm-Message-State: AA6/9RkZc/0Np+GtLE083tWr09P3TV2zvX+nH5FnO7K8BiCIYmfVc1tGyTKbAHZOHuHyLUfu0g6gGPUJScthGw== X-Received: by 10.28.107.22 with SMTP id g22mr8271838wmc.31.1475671027025; Wed, 05 Oct 2016 05:37:07 -0700 (PDT) MIME-Version: 1.0 Received: by 10.28.152.150 with HTTP; Wed, 5 Oct 2016 05:36:36 -0700 (PDT) From: Gemma Gordon Date: Wed, 5 Oct 2016 13:36:36 +0100 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel@lists.xenproject.org Subject: [MirageOS-devel] MirageOS fortnightly catchup - Wednesday 5th October 4pm UK time (UTC+1) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============8234772127727923976==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============8234772127727923976== Content-Type: multipart/alternative; boundary=001a1146563c5f0e92053e1d6f0d --001a1146563c5f0e92053e1d6f0d Content-Type: text/plain; charset=UTF-8 Hi all, We'll be using IRC again so please join #mirage on Freenode. IRC logs from the last session are currently up at: http://canopy.mirage.io/irclogs/20-04-2016 and this session will also be logged at: http://canopy.mirage.io/irclogs The agenda for the meeting is at: https://github.com/mirage/mirage-www/wiki/Call-Agenda Please read over the agenda and add anything you'd like to talk about to the wiki. See you later! --001a1146563c5f0e92053e1d6f0d Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi all,

We'll be using=C2=A0IRC=C2=A0again so please jo= in #mi= rage= =C2=A0on Freenode.
IRC= =C2=A0= logs from the last session are currently up at:
http://canopy.mirage.io/irclogs/2= 0-04-2016
and this session will also be = logged at:
http://cano= py.mirage.io/irclogs

<= span style=3D"font-family:arial,sans-serif;font-size:12.8px">The agenda for= the meeting is at:
https://github.com/mirage/mirage-www/wiki/Call-Age= nda

Please read over the agenda and add anything you'd like to = talk about to the wiki.=C2=A0 See you later!
--001a1146563c5f0e92053e1d6f0d-- --===============8234772127727923976== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============8234772127727923976==-- From mirageos-devel-bounces@lists.xenproject.org Wed Oct 05 16:05:57 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 05 Oct 2016 16:05:57 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brohT-0008Dt-26; Wed, 05 Oct 2016 16:05:43 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brohR-0008Dn-SJ for mirageos-devel@lists.xenproject.org; Wed, 05 Oct 2016 16:05:41 +0000 Received: from [193.109.254.147] by server-7.bemta-6.messagelabs.com id B2/42-15404-5D425F75; Wed, 05 Oct 2016 16:05:41 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrPIsWRWlGSWpSXmKPExsVy0237Ed0rKl/ DDTbc0bbobb3L4sDocfjDFZYAxijWzLyk/IoE1owVp5ewFFySqvjVsZutgXGtWBcjF4eQwANG iYcd/axdjJwcEgI2Ejc+fWOBSExlknjdvooFIiEvseHIdUaIRCOTxKOGX+wgCWEBS4lZ+7+B2 SIC6hLLTt1nBLGFBBIkJs26xwRiswHFF1/vAxvEK+AmceLMFLA4i4CKRPuuLWC9ogLhEqf/Nr JD1AhKnJz5BKyeUyBR4sbxn2D1zAKhEv8P72WZwMg/C0nZLCQpCNtMYt7mh8wQtrxE89bZQDY HkK0msaxVCVl4ASPbKkaN4tSistQiXUNLvaSizPSMktzEzBxdQwMzvdzU4uLE9NScxKRiveT8 3E2MwIBmAIIdjD+WBRxilORgUhLl3cTxNVyILyk/pTIjsTgjvqg0J7X4EKMMB4eSBO8UZaCcY FFqempFWmYOMLZg0hIcPEoivN9B0rzFBYm5xZnpEKlTjIpS4rzrQBICIImM0jy4Nlg8X2KUlR LmZQQ6RIinILUoN7MEVf4VozgHo5Iw72OQKTyZeSVw018BLWYCWpy/9AvI4pJEhJRUA2P9/Z+ HWfS143v/Hjc6mBia3Hfujv3cDu5vwfu3FR5Uan23sYzxhOTRx3k3uKab35n9/lVy2UEZ/aii j7d4bpxc6nr11fmI9/9VJ1xq4AktOih5fdVuL4Olp184X/dXTcyVSdA02tUTLVnJXdDU0tTle FvbYe2TVVnXJ68x5I89Muvsw0DfVVuVWIozEg21mIuKEwGy8JBs4gIAAA== X-Env-Sender: mindy@somerandomidiot.com X-Msg-Ref: server-14.tower-27.messagelabs.com!1475683540!51046331!1 X-Originating-IP: [217.70.183.196] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMjE3LjcwLjE4My4xOTYgPT4gMzk1MTY=\n X-StarScan-Received: X-StarScan-Version: 8.84; banners=-,-,- X-VirusChecked: Checked Received: (qmail 26887 invoked from network); 5 Oct 2016 16:05:40 -0000 Received: from relay4-d.mail.gandi.net (HELO relay4-d.mail.gandi.net) (217.70.183.196) by server-14.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 5 Oct 2016 16:05:40 -0000 Received: from mfilter15-d.gandi.net (mfilter15-d.gandi.net [217.70.178.143]) by relay4-d.mail.gandi.net (Postfix) with ESMTP id 7BC851720B1 for ; Wed, 5 Oct 2016 18:05:40 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at mfilter15-d.gandi.net Received: from relay4-d.mail.gandi.net ([IPv6:::ffff:217.70.183.196]) by mfilter15-d.gandi.net (mfilter15-d.gandi.net [::ffff:10.0.15.180]) (amavisd-new, port 10024) with ESMTP id Hwwpb8koUhqn for ; Wed, 5 Oct 2016 18:05:39 +0200 (CEST) X-Originating-IP: 216.1.123.126 Received: from [10.137.3.11] (unknown [216.1.123.126]) (Authenticated sender: guybrush@somerandomidiot.com) by relay4-d.mail.gandi.net (Postfix) with ESMTPSA id B4C90172095 for ; Wed, 5 Oct 2016 18:05:38 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: From: Mindy Message-ID: <908426de-7417-9b02-9f11-8ca5a58fed90@somerandomidiot.com> Date: Wed, 5 Oct 2016 11:05:36 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] Raspberry Pi 3 installation X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1491417214697460343==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" This is a multi-part message in MIME format. --===============1491417214697460343== Content-Type: multipart/alternative; boundary="------------16842E5B6B21E32B42180D15" This is a multi-part message in MIME format. --------------16842E5B6B21E32B42180D15 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit On 10/04/2016 03:10 PM, Eugene Bagdasaryan wrote: > Hey guys > > I have found some email threads on Raspberry Pi 3 installation, but so > far haven’t found any useful guide for installing Xen or Kvm on RPI3 > do you have any guides for this? > As I understand it, the RPi3 is missing some essential bits for hardware virtualization. Running unikernels built with solo5 under qemu should still be an option, though -- see https://github.com/rudenoise/xen-mirage-rpi3 for a list of steps to try, although it looks like this person didn't get a chance to take a run at that approach yet. -Mindy --------------16842E5B6B21E32B42180D15 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit

On 10/04/2016 03:10 PM, Eugene Bagdasaryan wrote:

Hey guys

 

I have found some email threads on Raspberry Pi 3 installation, but so far haven’t found any useful guide for installing Xen or Kvm on RPI3 do you have any guides for this?


As I understand it, the RPi3 is missing some essential bits for hardware virtualization.  Running unikernels built with solo5 under qemu should still be an option, though -- see https://github.com/rudenoise/xen-mirage-rpi3 for a list of steps to try, although it looks like this person didn't get a chance to take a run at that approach yet.

-Mindy
--------------16842E5B6B21E32B42180D15-- --===============1491417214697460343== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============1491417214697460343==-- From mirageos-devel-bounces@lists.xenproject.org Wed Oct 05 16:05:57 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 05 Oct 2016 16:05:57 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brohT-0008Dt-26; Wed, 05 Oct 2016 16:05:43 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brohR-0008Dn-SJ for mirageos-devel@lists.xenproject.org; Wed, 05 Oct 2016 16:05:41 +0000 Received: from [193.109.254.147] by server-7.bemta-6.messagelabs.com id B2/42-15404-5D425F75; Wed, 05 Oct 2016 16:05:41 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrPIsWRWlGSWpSXmKPExsVy0237Ed0rKl/ DDTbc0bbobb3L4sDocfjDFZYAxijWzLyk/IoE1owVp5ewFFySqvjVsZutgXGtWBcjF4eQwANG iYcd/axdjJwcEgI2Ejc+fWOBSExlknjdvooFIiEvseHIdUaIRCOTxKOGX+wgCWEBS4lZ+7+B2 SIC6hLLTt1nBLGFBBIkJs26xwRiswHFF1/vAxvEK+AmceLMFLA4i4CKRPuuLWC9ogLhEqf/Nr JD1AhKnJz5BKyeUyBR4sbxn2D1zAKhEv8P72WZwMg/C0nZLCQpCNtMYt7mh8wQtrxE89bZQDY HkK0msaxVCVl4ASPbKkaN4tSistQiXUNLvaSizPSMktzEzBxdQwMzvdzU4uLE9NScxKRiveT8 3E2MwIBmAIIdjD+WBRxilORgUhLl3cTxNVyILyk/pTIjsTgjvqg0J7X4EKMMB4eSBO8UZaCcY FFqempFWmYOMLZg0hIcPEoivN9B0rzFBYm5xZnpEKlTjIpS4rzrQBICIImM0jy4Nlg8X2KUlR LmZQQ6RIinILUoN7MEVf4VozgHo5Iw72OQKTyZeSVw018BLWYCWpy/9AvI4pJEhJRUA2P9/Z+ HWfS143v/Hjc6mBia3Hfujv3cDu5vwfu3FR5Uan23sYzxhOTRx3k3uKab35n9/lVy2UEZ/aii j7d4bpxc6nr11fmI9/9VJ1xq4AktOih5fdVuL4Olp184X/dXTcyVSdA02tUTLVnJXdDU0tTle FvbYe2TVVnXJ68x5I89Muvsw0DfVVuVWIozEg21mIuKEwGy8JBs4gIAAA== X-Env-Sender: mindy@somerandomidiot.com X-Msg-Ref: server-14.tower-27.messagelabs.com!1475683540!51046331!1 X-Originating-IP: [217.70.183.196] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMjE3LjcwLjE4My4xOTYgPT4gMzk1MTY=\n X-StarScan-Received: X-StarScan-Version: 8.84; banners=-,-,- X-VirusChecked: Checked Received: (qmail 26887 invoked from network); 5 Oct 2016 16:05:40 -0000 Received: from relay4-d.mail.gandi.net (HELO relay4-d.mail.gandi.net) (217.70.183.196) by server-14.tower-27.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 5 Oct 2016 16:05:40 -0000 Received: from mfilter15-d.gandi.net (mfilter15-d.gandi.net [217.70.178.143]) by relay4-d.mail.gandi.net (Postfix) with ESMTP id 7BC851720B1 for ; Wed, 5 Oct 2016 18:05:40 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at mfilter15-d.gandi.net Received: from relay4-d.mail.gandi.net ([IPv6:::ffff:217.70.183.196]) by mfilter15-d.gandi.net (mfilter15-d.gandi.net [::ffff:10.0.15.180]) (amavisd-new, port 10024) with ESMTP id Hwwpb8koUhqn for ; Wed, 5 Oct 2016 18:05:39 +0200 (CEST) X-Originating-IP: 216.1.123.126 Received: from [10.137.3.11] (unknown [216.1.123.126]) (Authenticated sender: guybrush@somerandomidiot.com) by relay4-d.mail.gandi.net (Postfix) with ESMTPSA id B4C90172095 for ; Wed, 5 Oct 2016 18:05:38 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: From: Mindy Message-ID: <908426de-7417-9b02-9f11-8ca5a58fed90@somerandomidiot.com> Date: Wed, 5 Oct 2016 11:05:36 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] Raspberry Pi 3 installation X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1491417214697460343==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" This is a multi-part message in MIME format. --===============1491417214697460343== Content-Type: multipart/alternative; boundary="------------16842E5B6B21E32B42180D15" This is a multi-part message in MIME format. --------------16842E5B6B21E32B42180D15 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit On 10/04/2016 03:10 PM, Eugene Bagdasaryan wrote: > Hey guys > > I have found some email threads on Raspberry Pi 3 installation, but so > far haven’t found any useful guide for installing Xen or Kvm on RPI3 > do you have any guides for this? > As I understand it, the RPi3 is missing some essential bits for hardware virtualization. Running unikernels built with solo5 under qemu should still be an option, though -- see https://github.com/rudenoise/xen-mirage-rpi3 for a list of steps to try, although it looks like this person didn't get a chance to take a run at that approach yet. -Mindy --------------16842E5B6B21E32B42180D15 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit

On 10/04/2016 03:10 PM, Eugene Bagdasaryan wrote:

Hey guys

 

I have found some email threads on Raspberry Pi 3 installation, but so far haven’t found any useful guide for installing Xen or Kvm on RPI3 do you have any guides for this?


As I understand it, the RPi3 is missing some essential bits for hardware virtualization.  Running unikernels built with solo5 under qemu should still be an option, though -- see https://github.com/rudenoise/xen-mirage-rpi3 for a list of steps to try, although it looks like this person didn't get a chance to take a run at that approach yet.

-Mindy
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Date: Mon, 10 Oct 2016 12:41:49 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: Subject: [MirageOS-devel] RFC: disconnect / DEVICE lifetime X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" SGVsbG8sCgpPbiAzMC8wOS8yMDE2IDE4OjEzLCBIYW5uZXMgTWVobmVydCB3cm90ZToKPiBTbyBm YXIsIGNvbm5lY3QgcmV0dXJucyBbIGBPayBvZiAnYSB8IGBFcnJvciBvZiAnYiBdIEx3dC50LCBh bmQgaW4gdGhlCj4gZXJyb3IgY2FzZSBmdW5jdG9yaWEgZW1pdHMgYSAiZmFpbCAoRmFpbHVyZSA8 ZGV2aWNlbmFtZT4pIi4gIFRoaXMgaXMKPiBjbGVhcmx5IG5vdCB2ZXJ5IGluZm9ybWF0aXZlIHRv IHBvdGVudGlhbCB1c2VycyAoYW4gZXhhbXBsZSBiZWluZwo+ICJGYWlsdXJlIG5ldDExIikuCgpU 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id 5B3F525C2 for ; Mon, 10 Oct 2016 12:42:08 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: From: Hannes Mehnert Message-ID: Date: Mon, 10 Oct 2016 12:41:49 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: Subject: [MirageOS-devel] RFC: disconnect / DEVICE lifetime X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" SGVsbG8sCgpPbiAzMC8wOS8yMDE2IDE4OjEzLCBIYW5uZXMgTWVobmVydCB3cm90ZToKPiBTbyBm YXIsIGNvbm5lY3QgcmV0dXJucyBbIGBPayBvZiAnYSB8IGBFcnJvciBvZiAnYiBdIEx3dC50LCBh bmQgaW4gdGhlCj4gZXJyb3IgY2FzZSBmdW5jdG9yaWEgZW1pdHMgYSAiZmFpbCAoRmFpbHVyZSA8 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+0100 (BST) Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Anil Madhavapeddy In-Reply-To: <9C0C06AC-27BC-4C89-9D8B-A5D090747FA1@cornell.edu> Date: Mon, 10 Oct 2016 12:42:40 +0100 Message-Id: References: <908426de-7417-9b02-9f11-8ca5a58fed90@somerandomidiot.com> <9C0C06AC-27BC-4C89-9D8B-A5D090747FA1@cornell.edu> To: Eugene Bagdasaryan X-Mailer: Apple Mail (2.3124) Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Raspberry Pi 3 installation X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTAgT2N0IDIwMTYsIGF0IDA0OjIwLCBFdWdlbmUgQmFnZGFzYXJ5YW4gPGViNjkzQGNvcm5l bGwuZWR1PiB3cm90ZToKPiAKPiBUaGFua3MgZm9yIHRoZSByZXNwb25zZSEgSSB1bmRlcnN0b29k 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Thomas Leonard Date: Mon, 10 Oct 2016 16:00:38 +0200 Message-ID: To: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] RFC: disconnect / DEVICE lifetime X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTAgT2N0b2JlciAyMDE2IGF0IDEyOjQxLCBIYW5uZXMgTWVobmVydCA8aGFubmVzQG1laG5l cnQub3JnPiB3cm90ZToKPiBIZWxsbywKPgo+IE9uIDMwLzA5LzIwMTYgMTg6MTMsIEhhbm5lcyBN ZWhuZXJ0IHdyb3RlOgo+PiBTbyBmYXIsIGNvbm5lY3QgcmV0dXJucyBbIGBPayBvZiAnYSB8IGBF cnJvciBvZiAnYiBdIEx3dC50LCBhbmQgaW4gdGhlCj4+IGVycm9yIGNhc2UgZnVuY3RvcmlhIGVt aXRzIGEgImZhaWwgKEZhaWx1cmUgPGRldmljZW5hbWU+KSIuICBUaGlzIGlzCj4+IGNsZWFybHkg bm90IHZlcnkgaW5mb3JtYXRpdmUgdG8gcG90ZW50aWFsIHVzZXJzIChhbiBleGFtcGxlIGJlaW5n 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 4814 invoked from network); 11 Oct 2016 12:48:00 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-3.tower-206.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 11 Oct 2016 12:48:00 -0000 Received: from [192.168.1.101] (unknown [88.130.131.252]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id 2858A2DA5 for ; Tue, 11 Oct 2016 14:47:59 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: From: Hannes Mehnert Message-ID: <62196c08-9717-bb67-e675-415cdd9d8d70@mehnert.org> Date: Tue, 11 Oct 2016 14:47:33 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] RFC: disconnect / DEVICE lifetime X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============0459513976271282040==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============0459513976271282040== Content-Type: multipart/signed; micalg=pgp-sha384; protocol="application/pgp-signature"; boundary="SGT5eNdhUHaFBqpHaFnuNxa2UCW03SwbW" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --SGT5eNdhUHaFBqpHaFnuNxa2UCW03SwbW Content-Type: multipart/mixed; boundary="Bmxci8KxHqwtG8bNkIsQucNT0unv2w3pQ" From: Hannes Mehnert To: mirageos-devel@lists.xenproject.org Message-ID: <62196c08-9717-bb67-e675-415cdd9d8d70@mehnert.org> Subject: Re: [MirageOS-devel] RFC: disconnect / DEVICE lifetime References: In-Reply-To: --Bmxci8KxHqwtG8bNkIsQucNT0unv2w3pQ Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 10/10/2016 16:00, Thomas Leonard wrote: >> This leads to the lifetime of a DEVICE instance: they can be demanded= >> by a unikernel (during configuration/build time), and must be present >> (and in working operation) during runtime. (In some future OCaml it'd= >> be nice to have linear types and be able to express that disconnect >> consumes the given t. But we're not there yet.) >> There's at no time any need to dynamically allocate a DEVICE and use i= t >> temporarily within the lifetime of a unikernel (please tell me if I'm >> wrong and you've scenarios in mind where you want to spawn DEVICEs >> dynamically [*]). >=20 > mirage-firewall starts new network devices as new client VMs turn up. Good point. Let me rephrase: each DEVICE used in config.ml will be `connect` during initialisation (fail hard!), and will be disconnected during teardown (NYI) -- no user manually calls disconnect on any DEVICE where they did not call connect. > Add a `~switch` argument to the `connect` functions and have devices > disconnect when the switch is turned off. main.ml can pass a single > switch to everything it starts, and turn it off at the end. Remove the > `disconnect` function from DEVICE. That sounds like a plausible alternative, anyone else has experience with Lwt_switch (I didn't know of it until now)? > In general, you only need to check at the lowest level (e.g. writing > to a ring buffer or notifying an event channel), where failing to do > this would lead to memory corruption or similar. Higher levels (e.g. > FAT) shouldn't need to check, as an exception will be raised > automatically when they try to access their underlying device. Higher levels may introduce caches they might want to flush on shutdown. > In any case, this is a programming error and so should be reported as > an exception. >=20 > mirage-net-xen had to check manually because currently you can't > disconnect a shared ring, I think. If shared-memory-ring provided a > reliable way to disconnect, mirage-net-xen wouldn't have to do its own > checks. >=20 >> TL;DR: emit disconnect chain in functoria/mirage, remove checks from >> mirage-block-unix [tentative 1], remove more code ;) >=20 > You can't remove the check from mirage-block-unix because OCaml's file > descriptors are unsafe (e.g. closing the same FD twice may close a > different FD). IC. Not clear what is the best to move forward here: a) claim use-after-disconnect to be undefined behaviour (no checks, but may lead to hard to find errors), b) implement checks `if state =3D=3D Disconnecte= d then `Error `Disconnected else ...` in all DEVICES (to have a uniform story), or c) have an exception disconnected and raise in some (or all?) DEVICES when an operation is attempted on a disconnected device. IMHO it would be nice to have a uniform story for DEVICES (and being able to clean up resources) -- I currently prefer (b) to implement the disconnected state checks in all devices, and return an error `Disconnected if an operation is tried on a disconnected device. hannes --Bmxci8KxHqwtG8bNkIsQucNT0unv2w3pQ-- --SGT5eNdhUHaFBqpHaFnuNxa2UCW03SwbW Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCQAGBQJX/N9lAAoJELyJZYjffCjuqe8QALD2Nd7Sb7D56trb8qM9vDgL rjO5JadqEerN7/LfliPPOqUb0nUwbHQjaE0iZvE56MyG0LOH9WAUQeGv1hdgI8SE HlB88bExzmsSWV7TpvykBM+zH+zImlEkKlEcHXDb60PxXNLVDqyqM4l232gCKfk+ 5miQdaj7P4iwRQFvxzyekcMznnGkVeBDd0i/nKXavDdMXc+p8waAYmGcAUiaH7jj UrDMZbsUfBUMrWZGaqqs/qcP6fhs4eSS8KRPa2wv2XuMqJbeSOpq/os6UJSvQYjM 0eV2q5+eFQgD8JsvoCyR1qx5juiVUHbs0VZ/ZYujd6foRvYqPTN4mVea0vlCGgoO P0szgFl9/1fo36vl1xUw84tUImm6H+YIgPngJ6tr1ksixwIzqgie4FAk7jKomcji m5QP/AgZuhh4leNpbdogcC7s7HncKHrjlb0bwZCN5YzqR5JPdbe0FVm6tZM3kmBY NKZgJTyk1taLs3WV1beBq6MEn8L3ySwf3qYWnkNLhIm4ph/IwBI5VJxrOgsn2NHk Gvf99mwuBVaNMPfYCM+EROEjKat90FkfiY5HWpVpHSel07tmoMmdRlYDYVTRsfa1 S5YMTHRQ2H6dcZeSzOTQ+5YBdwyHoYFeufK+A6HkBZD9VYSFuP9Zw64O9zfb1mX5 PLU8J7FHrrUj46KMrTiz =/XfL -----END PGP SIGNATURE----- --SGT5eNdhUHaFBqpHaFnuNxa2UCW03SwbW-- --===============0459513976271282040== Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 4814 invoked from network); 11 Oct 2016 12:48:00 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-3.tower-206.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 11 Oct 2016 12:48:00 -0000 Received: from [192.168.1.101] (unknown [88.130.131.252]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id 2858A2DA5 for ; Tue, 11 Oct 2016 14:47:59 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: From: Hannes Mehnert Message-ID: <62196c08-9717-bb67-e675-415cdd9d8d70@mehnert.org> Date: Tue, 11 Oct 2016 14:47:33 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] RFC: disconnect / DEVICE lifetime X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============0459513976271282040==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============0459513976271282040== Content-Type: multipart/signed; micalg=pgp-sha384; protocol="application/pgp-signature"; boundary="SGT5eNdhUHaFBqpHaFnuNxa2UCW03SwbW" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --SGT5eNdhUHaFBqpHaFnuNxa2UCW03SwbW Content-Type: multipart/mixed; boundary="Bmxci8KxHqwtG8bNkIsQucNT0unv2w3pQ" From: Hannes Mehnert To: mirageos-devel@lists.xenproject.org Message-ID: <62196c08-9717-bb67-e675-415cdd9d8d70@mehnert.org> Subject: Re: [MirageOS-devel] RFC: disconnect / DEVICE lifetime References: In-Reply-To: --Bmxci8KxHqwtG8bNkIsQucNT0unv2w3pQ Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 10/10/2016 16:00, Thomas Leonard wrote: >> This leads to the lifetime of a DEVICE instance: they can be demanded= >> by a unikernel (during configuration/build time), and must be present >> (and in working operation) during runtime. (In some future OCaml it'd= >> be nice to have linear types and be able to express that disconnect >> consumes the given t. But we're not there yet.) >> There's at no time any need to dynamically allocate a DEVICE and use i= t >> temporarily within the lifetime of a unikernel (please tell me if I'm >> wrong and you've scenarios in mind where you want to spawn DEVICEs >> dynamically [*]). >=20 > mirage-firewall starts new network devices as new client VMs turn up. Good point. Let me rephrase: each DEVICE used in config.ml will be `connect` during initialisation (fail hard!), and will be disconnected during teardown (NYI) -- no user manually calls disconnect on any DEVICE where they did not call connect. > Add a `~switch` argument to the `connect` functions and have devices > disconnect when the switch is turned off. main.ml can pass a single > switch to everything it starts, and turn it off at the end. Remove the > `disconnect` function from DEVICE. That sounds like a plausible alternative, anyone else has experience with Lwt_switch (I didn't know of it until now)? > In general, you only need to check at the lowest level (e.g. writing > to a ring buffer or notifying an event channel), where failing to do > this would lead to memory corruption or similar. Higher levels (e.g. > FAT) shouldn't need to check, as an exception will be raised > automatically when they try to access their underlying device. Higher levels may introduce caches they might want to flush on shutdown. > In any case, this is a programming error and so should be reported as > an exception. >=20 > mirage-net-xen had to check manually because currently you can't > disconnect a shared ring, I think. If shared-memory-ring provided a > reliable way to disconnect, mirage-net-xen wouldn't have to do its own > checks. >=20 >> TL;DR: emit disconnect chain in functoria/mirage, remove checks from >> mirage-block-unix [tentative 1], remove more code ;) >=20 > You can't remove the check from mirage-block-unix because OCaml's file > descriptors are unsafe (e.g. closing the same FD twice may close a > different FD). IC. Not clear what is the best to move forward here: a) claim use-after-disconnect to be undefined behaviour (no checks, but may lead to hard to find errors), b) implement checks `if state =3D=3D Disconnecte= d then `Error `Disconnected else ...` in all DEVICES (to have a uniform story), or c) have an exception disconnected and raise in some (or all?) DEVICES when an operation is attempted on a disconnected device. 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Thu, 13 Oct 2016 16:03:07 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: <5085392b-8d4f-a315-92a6-5c393276daa4@mehnert.org> From: Mindy Message-ID: Date: Thu, 13 Oct 2016 09:03:07 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <5085392b-8d4f-a315-92a6-5c393276daa4@mehnert.org> Subject: Re: [MirageOS-devel] deprecating 4.02? X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMDkvMDEvMjAxNiAwMzowNSBBTSwgSGFubmVzIE1laG5lcnQgd3JvdGU6Cgo+IE9uIDMxLzA4 LzIwMTYgMTc6MzEsIE1pbmR5IHdyb3RlOgo+PiBIYXZpbmcganVzdCB0cmlwcGVkIG92ZXIgc29t ZXRoaW5nIGF2YWlsYWJsZSBpbiA0LjAzIGJ1dCBub3QgNC4wMgo+IGlzIHRoaXMgc2lnbmlmaWNh bnQgZW5vdWdoIHRvIGRyb3AgNC4wMiBzdXBwb3J0IChvciBpcyBpdCBvbmx5IHRoZQo+IEhhc2h0 YmwuZmlsdGVyX21hcF9pbnBsYWNlKT8KCkhhc2h0YmwuZmlsdGVyX21hcF9pbnBsYWNlIGlzbid0 IGEgYmlnIGRlYWwsIGJ1dCBJIHRyaXAgb3ZlciB0aGUgbGFjayBvZiAKaW5idWlsdCBgcmVzdWx0 YCBhbGwgdGhlIHRpbWUuCgo+Cj4gU2luY2UgbW9zdCBNaXJhZ2VPUyBhcHBsaWNhdGlvbnMgZGVw bG95ZWQgaW4gdGhlIHdpbGQgc3RpbGwgdXNlIDQuMDIsCj4gSSdkIGFwcHJlY2lhdGUga2VlcGlu ZyBpdCAodW50aWwgZS5nLiA0LjA0IGlzIHJlbGVhc2VkLCBhbmQKPiBvY2FtbC1mcmVlc3RhbmRp bmcgJiBtaXJhZ2UteGVuLW9jYW1sIHN1cHBvcnQgNC4wNCkuCgpJJ2QgcmVhbGx5IGxpa2UgdG8g ZGVwcmVjYXRlIDQuMDIgZm9yIE1pcmFnZU9TIDM7IG5vYm9keSB3aWxsIGJlIApidWlsZGluZyB0 aGVpciBleGlzdGluZyB1bmlrZXJuZWxzIGluIHRoYXQgcGFja2FnZSB1bml2ZXJzZSB3aXRob3V0 IApoYXZpbmcgdG8gcmV2aXNpdCB0aGVtIGFscmVhZHkuCgotTWluZHkKCl9fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCk1pcmFnZU9TLWRldmVsIG1haWxpbmcg bGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhl bnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1hbi9saXN0aW5mby9taXJhZ2Vvcy1kZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Thu Oct 13 14:03:25 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 13 Oct 2016 14:03:25 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bugbJ-0002wb-Hg; Thu, 13 Oct 2016 14:03:13 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bugbI-0002wR-Aa for mirageos-devel@lists.xenproject.org; Thu, 13 Oct 2016 14:03:12 +0000 Received: from [85.158.137.68] by server-12.bemta-3.messagelabs.com id E5/EC-04658-F149FF75; Thu, 13 Oct 2016 14:03:11 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrEIsWRWlGSWpSXmKPExsVy0237IV25Kf/ DDS6uNLTobb3L4sDocfjDFZYAxijWzLyk/IoE1owH8xvYCq6xVpy5846xgfE2SxcjF4eQwH1G iaW3rzF1MXJySAjYSJxuXcoMkZjKJLHo6XW2LkYOoIScxOenhhDx/4wSX/p2sIE0CAvoSyw5t R/MFhFQl1h26j4jSL2QQJXEkqU8IGE2oPDi630sIDavgJvE8mdHWUFsFgFVicn3/4K1igqES7 yftZANokZQ4uTMJ2D1nAL2Eit+Lwe7jVnATGLe5ofMELa8xPa3c5gnMArMQtIyC0nZLCRlCxi ZVzFqFKcWlaUW6RqZ6SUVZaZnlOQmZuboGhoY6+WmFhcnpqfmJCYV6yXn525iBIZnPQMD4w7G hr1+hxglOZiURHl/+f0PF+JLyk+pzEgszogvKs1JLT7EKMPBoSTBKz4ZKCdYlJqeWpGWmQOMF Ji0BAePkgivPUiat7ggMbc4Mx0idYpRl2PBj9trmYRY8vLzUqXEeW9PAioSACnKKM2DGwGL2k uMslLCvIwMDAxCPAWpRbmZJajyrxjFORiVhHk/gEzhycwrgdv0CugIJqAjbCb9ATmiJBEhJdX A6Mqpcm+fKDvfn7erS5K/frA+6eKRbbb/hYH+ApWCFfPzb4tLeRew+Cg0cO3dlf9esUZzgffP wJ7CLesN1NPu5SUGJiSrrnUMfq/PYflGIddo5lqZwoKqzKIkf8cPv0pCIg5MyjHZ7+UhJlo9v ZAhuknx9yaDKS9lv2fFnOS109eapJHVNEmJpTgj0VCLuag4EQABmn3i1QIAAA== X-Env-Sender: mindy@somerandomidiot.com X-Msg-Ref: server-7.tower-31.messagelabs.com!1476367390!58436226!1 X-Originating-IP: [217.70.183.194] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 8.84; banners=-,-,- X-VirusChecked: Checked Received: (qmail 6219 invoked from network); 13 Oct 2016 14:03:10 -0000 Received: from relay2-d.mail.gandi.net (HELO relay2-d.mail.gandi.net) (217.70.183.194) by server-7.tower-31.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 13 Oct 2016 14:03:10 -0000 Received: from mfilter31-d.gandi.net (mfilter31-d.gandi.net [217.70.178.162]) by relay2-d.mail.gandi.net (Postfix) with ESMTP id 65DD0C5A68 for ; Thu, 13 Oct 2016 16:03:10 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at mfilter31-d.gandi.net Received: from relay2-d.mail.gandi.net ([IPv6:::ffff:217.70.183.194]) by mfilter31-d.gandi.net (mfilter31-d.gandi.net [::ffff:10.0.15.180]) (amavisd-new, port 10024) with ESMTP id WjzyrMUf9vAz for ; Thu, 13 Oct 2016 16:03:08 +0200 (CEST) X-Originating-IP: 194.72.166.2 Received: from [10.137.3.11] (unknown [194.72.166.2]) (Authenticated sender: guybrush@somerandomidiot.com) by relay2-d.mail.gandi.net (Postfix) with ESMTPSA id 553FEC5A93 for ; Thu, 13 Oct 2016 16:03:07 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: <5085392b-8d4f-a315-92a6-5c393276daa4@mehnert.org> From: Mindy Message-ID: Date: Thu, 13 Oct 2016 09:03:07 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <5085392b-8d4f-a315-92a6-5c393276daa4@mehnert.org> Subject: Re: [MirageOS-devel] deprecating 4.02? 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X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTMgT2N0IDIwMTYsIGF0IDE1OjAzLCBNaW5keSA8bWluZHlAc29tZXJhbmRvbWlkaW90LmNv bT4gd3JvdGU6Cj4gCj4gT24gMDkvMDEvMjAxNiAwMzowNSBBTSwgSGFubmVzIE1laG5lcnQgd3Jv dGU6Cj4gCj4+IE9uIDMxLzA4LzIwMTYgMTc6MzEsIE1pbmR5IHdyb3RlOgo+Pj4gSGF2aW5nIGp1 c3QgdHJpcHBlZCBvdmVyIHNvbWV0aGluZyBhdmFpbGFibGUgaW4gNC4wMyBidXQgbm90IDQuMDIK Pj4gaXMgdGhpcyBzaWduaWZpY2FudCBlbm91Z2ggdG8gZHJvcCA0LjAyIHN1cHBvcnQgKG9yIGlz IGl0IG9ubHkgdGhlCj4+IEhhc2h0YmwuZmlsdGVyX21hcF9pbnBsYWNlKT8KPiAKPiBIYXNodGJs LmZpbHRlcl9tYXBfaW5wbGFjZSBpc24ndCBhIGJpZyBkZWFsLCBidXQgSSB0cmlwIG92ZXIgdGhl IGxhY2sgb2YgaW5idWlsdCBgcmVzdWx0YCBhbGwgdGhlIHRpbWUuCj4gCj4+IAo+PiBTaW5jZSBt b3N0IE1pcmFnZU9TIGFwcGxpY2F0aW9ucyBkZXBsb3llZCBpbiB0aGUgd2lsZCBzdGlsbCB1c2Ug NC4wMiwKPj4gSSdkIGFwcHJlY2lhdGUga2VlcGluZyBpdCAodW50aWwgZS5nLiA0LjA0IGlzIHJl bGVhc2VkLCBhbmQKPj4gb2NhbWwtZnJlZXN0YW5kaW5nICYgbWlyYWdlLXhlbi1vY2FtbCBzdXBw b3J0IDQuMDQpLgo+IAo+IEknZCByZWFsbHkgbGlrZSB0byBkZXByZWNhdGUgNC4wMiBmb3IgTWly YWdlT1MgMzsgbm9ib2R5IHdpbGwgYmUgYnVpbGRpbmcgdGhlaXIgZXhpc3RpbmcgdW5pa2VybmVs cyBpbiB0aGF0IHBhY2thZ2UgdW5pdmVyc2Ugd2l0aG91dCBoYXZpbmcgdG8gcmV2aXNpdCB0aGVt IGFscmVhZHkuCgpBZ3JlZWQuIFRoZSBidWlsdGluIHJlc3VsdCBhbmQgZ3VhcmFudGVlZCBhdmFp bGFiaWxpdHkgb2YgZmxhbWJkYSBhcmUgdHdvIGdvb2QgcmVhc29ucyBmb3IgbWUuICBOb3RlIHRo YXQgaW5kaXZpZHVhbCBsaWJyYXJpZXMgY2FuIHN0aWxsIGNob29zZSB0byBtYWludGFpbiBzdXBw b3J0LCBpdHMganVzdCB0aGF0IHdlIHdvbnQgZ3VhcmFudGVlIGl0IG91cnNlbHZlcyBmcm9tIHRo ZSBtYWluIG1pcmFnZSB0b29sLgoKQW5pbApfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fXwpNaXJhZ2VPUy1kZXZlbCBtYWlsaW5nIGxpc3QKTWlyYWdlT1MtZGV2 ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9jZ2kt YmluL21haWxtYW4vbGlzdGluZm8vbWlyYWdlb3MtZGV2ZWwK From mirageos-devel-bounces@lists.xenproject.org Thu Oct 13 14:10:56 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 13 Oct 2016 14:10:56 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bugil-0003Tv-5b; 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Fri, 14 Oct 2016 11:29:11 +0100 (BST) From: Anil Madhavapeddy Message-Id: Date: Fri, 14 Oct 2016 11:29:10 +0100 To: mirageos-devel Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) X-Mailer: Apple Mail (2.3124) Subject: [MirageOS-devel] docs.mirage.io building again X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" R29vZCBuZXdzIGV2ZXJ5b25lISBUaGUgZXhwZXJpbWVudGFsIGRvY3VtZW50YXRpb24gcmVwb3Np dG9yeSBhdCBodHRwOi8vZG9jcy5taXJhZ2UuaW8gbm93IGJ1aWxkcyBhZ2FpbiwgYW5kIGhhcyBi ZWVuIHJlZnJlc2hlZCB0byB0aGUgbGF0ZXN0IHNldCBvZiBsaWJyYXJpZXMgYXNzZW1ibGVkIGZy b20gdGhlIE1pcmFnZU9TMyBkZXYgcmVtb3RlIGF0IGh0dHBzOi8vZ2l0aHViLmNvbS9taXJhZ2Uv bWlyYWdlLWRldgoKQXMgYSByZW1pbmRlciwgdGhpcyBoYXMgYmVjb21lIHRoZSB1bm9mZmljaWFs ICJ0cm92ZSIgc2luY2UgaXQgYXR0ZW1wdHMgdG8gYnVpbGQgYWxsIHRoZSBsaWJyYXJpZXMgaW4g b25lIE9QQU0gaW5zdGFsbCBpbnN0cnVjdGlvbjoKaHR0cHM6Ly9naXRodWIuY29tL21pcmFnZS9t aXJhZ2UvYmxvYi9tYXN0ZXIvRG9ja2VyZmlsZS5kb2MKCmFuZCB0aGVuIHVzZXMgb2RpZyB0byBi dWlsZCB0aGUgYWdncmVnYXRlIGRvY3VtZW50YXRpb24gc2V0LiBUaGlzIGNhbiBhbHNvIGJlIGRv bmUgbG9jYWxseSBvbiB5b3VyIG1hY2hpbmUgdmlhIHRoZSBjb21tYW5kcyBpbiB0aGUgRG9ja2Vy ZmlsZS4KCkFzIHRoaXMgc2V0dXAgc3RhYmlsaXNlcywgSSB3aWxsIG1lcmdlIHRoZSBUUk9WRSBs aW5rcyBjdXJyZW50bHkgaGVsZCBpbiBtaXJhZ2Utd3d3IHdpdGggdGhpcyB2ZXJzaW9uICh3aGlj aCB1c2VzIE9QQU0gcGFja2FnZSBuYW1lcyByYXRoZXIgdGhhbiByZXBvc2l0b3JpZXMsIHdoaWNo IGlzIG1vcmUgdXNlZnVsIEkgdGhpbmspLgoKVGhhbmtzIHRvIGV2ZXJ5b25lIHdobyBoYXMgYmVl biBoYXJkIGF0IHdvcmsgcG9ydGluZyBsaWJyYXJpZXMgdG8gbWlyYWdlLWRldiBpbiB0aGUgcmVs ZWFzZSBlZmZvcnQgc28gZmFyLCBhbmQgaW4gcGFydGljdWxhciB0byBIYW5uZXMgTWVuaGVydCwg TWluZHkgUHJlc3RvbiwgTWFydGluIEx1Y2luYSwgRGF2ZSBTY290dCBhbmQgVGhvbWFzIEdhemFn bmFpcmUgd2hvIGhhdmUgYWxsIGJlZW4gc3RlYWRpbHkgc3VibWl0dGluZyAibWFzdGVyIGJyYW5j aCIgcG9ydHMgdG8gbWlyYWdlLWRldiB0byBrZWVwIGl0IGJ1aWxkaW5nIGFuZCBzdGFibGUgYXMg d2UgbWVyZ2UgdGhlIEFQSSBjaGFuZ2VzIHJlcXVpcmVkIGZvciBNaXJhZ2VPUzMuCgpyZWdhcmRz LApBbmlsCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCk1p cmFnZU9TLWRldmVsIG1haWxpbmcgbGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0 Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1hbi9saXN0aW5m by9taXJhZ2Vvcy1kZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 10:29:29 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 10:29:29 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1buzjo-0006fo-9m; 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Fri, 14 Oct 2016 11:29:11 +0100 (BST) From: Anil Madhavapeddy Message-Id: Date: Fri, 14 Oct 2016 11:29:10 +0100 To: mirageos-devel Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) X-Mailer: Apple Mail (2.3124) Subject: [MirageOS-devel] docs.mirage.io building again X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" R29vZCBuZXdzIGV2ZXJ5b25lISBUaGUgZXhwZXJpbWVudGFsIGRvY3VtZW50YXRpb24gcmVwb3Np dG9yeSBhdCBodHRwOi8vZG9jcy5taXJhZ2UuaW8gbm93IGJ1aWxkcyBhZ2FpbiwgYW5kIGhhcyBi ZWVuIHJlZnJlc2hlZCB0byB0aGUgbGF0ZXN0IHNldCBvZiBsaWJyYXJpZXMgYXNzZW1ibGVkIGZy b20gdGhlIE1pcmFnZU9TMyBkZXYgcmVtb3RlIGF0IGh0dHBzOi8vZ2l0aHViLmNvbS9taXJhZ2Uv bWlyYWdlLWRldgoKQXMgYSByZW1pbmRlciwgdGhpcyBoYXMgYmVjb21lIHRoZSB1bm9mZmljaWFs ICJ0cm92ZSIgc2luY2UgaXQgYXR0ZW1wdHMgdG8gYnVpbGQgYWxsIHRoZSBsaWJyYXJpZXMgaW4g b25lIE9QQU0gaW5zdGFsbCBpbnN0cnVjdGlvbjoKaHR0cHM6Ly9naXRodWIuY29tL21pcmFnZS9t aXJhZ2UvYmxvYi9tYXN0ZXIvRG9ja2VyZmlsZS5kb2MKCmFuZCB0aGVuIHVzZXMgb2RpZyB0byBi dWlsZCB0aGUgYWdncmVnYXRlIGRvY3VtZW50YXRpb24gc2V0LiBUaGlzIGNhbiBhbHNvIGJlIGRv bmUgbG9jYWxseSBvbiB5b3VyIG1hY2hpbmUgdmlhIHRoZSBjb21tYW5kcyBpbiB0aGUgRG9ja2Vy ZmlsZS4KCkFzIHRoaXMgc2V0dXAgc3RhYmlsaXNlcywgSSB3aWxsIG1lcmdlIHRoZSBUUk9WRSBs aW5rcyBjdXJyZW50bHkgaGVsZCBpbiBtaXJhZ2Utd3d3IHdpdGggdGhpcyB2ZXJzaW9uICh3aGlj aCB1c2VzIE9QQU0gcGFja2FnZSBuYW1lcyByYXRoZXIgdGhhbiByZXBvc2l0b3JpZXMsIHdoaWNo IGlzIG1vcmUgdXNlZnVsIEkgdGhpbmspLgoKVGhhbmtzIHRvIGV2ZXJ5b25lIHdobyBoYXMgYmVl biBoYXJkIGF0IHdvcmsgcG9ydGluZyBsaWJyYXJpZXMgdG8gbWlyYWdlLWRldiBpbiB0aGUgcmVs ZWFzZSBlZmZvcnQgc28gZmFyLCBhbmQgaW4gcGFydGljdWxhciB0byBIYW5uZXMgTWVuaGVydCwg TWluZHkgUHJlc3RvbiwgTWFydGluIEx1Y2luYSwgRGF2ZSBTY290dCBhbmQgVGhvbWFzIEdhemFn bmFpcmUgd2hvIGhhdmUgYWxsIGJlZW4gc3RlYWRpbHkgc3VibWl0dGluZyAibWFzdGVyIGJyYW5j aCIgcG9ydHMgdG8gbWlyYWdlLWRldiB0byBrZWVwIGl0IGJ1aWxkaW5nIGFuZCBzdGFibGUgYXMg d2UgbWVyZ2UgdGhlIEFQSSBjaGFuZ2VzIHJlcXVpcmVkIGZvciBNaXJhZ2VPUzMuCgpyZWdhcmRz LApBbmlsCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCk1p cmFnZU9TLWRldmVsIG1haWxpbmcgbGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0 Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1hbi9saXN0aW5m by9taXJhZ2Vvcy1kZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 10:34:42 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 10:34:42 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1buzp4-0007TT-6M; 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Fri, 14 Oct 2016 12:34:33 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: From: Mindy Message-ID: Date: Fri, 14 Oct 2016 05:34:33 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] docs.mirage.io building again X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" Ck9uIDEwLzE0LzIwMTYgMDU6MjkgQU0sIEFuaWwgTWFkaGF2YXBlZGR5IHdyb3RlOgo+IEdvb2Qg bmV3cyBldmVyeW9uZSEgVGhlIGV4cGVyaW1lbnRhbCBkb2N1bWVudGF0aW9uIHJlcG9zaXRvcnkg YXQgaHR0cDovL2RvY3MubWlyYWdlLmlvIG5vdyBidWlsZHMgYWdhaW4sIGFuZCBoYXMgYmVlbiBy ZWZyZXNoZWQgdG8gdGhlIGxhdGVzdCBzZXQgb2YgbGlicmFyaWVzIGFzc2VtYmxlZCBmcm9tIHRo ZSBNaXJhZ2VPUzMgZGV2IHJlbW90ZSBhdCBodHRwczovL2dpdGh1Yi5jb20vbWlyYWdlL21pcmFn ZS1kZXYKClRoaXMgaXMgZXh0cmVtZWx5IGNvb2whICBUaGFua3MgYSB0b24gZm9yIGdldHRpbmcg dGhpcyB1cCBhbmQgcnVubmluZywgCkFuaWwuICBBbHNvLCB0aGFua3MgdG8gRGFuaWVsIELDvG56 bGksIHRoZSBhdXRob3Igb2Ygb2RpZyEKCkkgbm90aWNlIHRoYXQgInZlcnNpb24iIGlzIGxpc3Rl ZCBhcyAiPyIgZm9yIG1hbnkgb2YgdGhlIHBhY2thZ2VzIAooaW5jbHVkaW5nIGh0dHA6Ly9kb2Nz Lm1pcmFnZS5pby9pcGFkZHIvaW5kZXguaHRtbCAsIHdoaWNoIHNob3VsZCBoYXZlIGEgCnByb3Bl ciB2ZXJzaW9uIG51bWJlciBvZiB0aGUgZm9ybSB3ZSB1c3VhbGx5IHNlZSBpbiB0aGUgbWFpbiBv cGFtIApyZXBvc2l0b3J5KS4gIFdoYXQncyB0aGUgYmVzdCBwbGFjZSB0byByZXBvcnQgaXNzdWVz IGxpa2UgdGhpcz8gIE1heWJlIAp0aGUgaXNzdWUgdHJhY2tlciBmb3Igb2RpZyBpdHNlbGY/CgpU aGFua3MsCgpNaW5keQoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fCk1pcmFnZU9TLWRldmVsIG1haWxpbmcgbGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54 ZW5wcm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1h bi9saXN0aW5mby9taXJhZ2Vvcy1kZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 10:34:42 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 10:34:42 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1buzp4-0007TT-6M; 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Fri, 14 Oct 2016 12:34:33 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: From: Mindy Message-ID: Date: Fri, 14 Oct 2016 05:34:33 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] docs.mirage.io building again X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" Ck9uIDEwLzE0LzIwMTYgMDU6MjkgQU0sIEFuaWwgTWFkaGF2YXBlZGR5IHdyb3RlOgo+IEdvb2Qg bmV3cyBldmVyeW9uZSEgVGhlIGV4cGVyaW1lbnRhbCBkb2N1bWVudGF0aW9uIHJlcG9zaXRvcnkg YXQgaHR0cDovL2RvY3MubWlyYWdlLmlvIG5vdyBidWlsZHMgYWdhaW4sIGFuZCBoYXMgYmVlbiBy ZWZyZXNoZWQgdG8gdGhlIGxhdGVzdCBzZXQgb2YgbGlicmFyaWVzIGFzc2VtYmxlZCBmcm9tIHRo ZSBNaXJhZ2VPUzMgZGV2IHJlbW90ZSBhdCBodHRwczovL2dpdGh1Yi5jb20vbWlyYWdlL21pcmFn ZS1kZXYKClRoaXMgaXMgZXh0cmVtZWx5IGNvb2whICBUaGFua3MgYSB0b24gZm9yIGdldHRpbmcg dGhpcyB1cCBhbmQgcnVubmluZywgCkFuaWwuICBBbHNvLCB0aGFua3MgdG8gRGFuaWVsIELDvG56 bGksIHRoZSBhdXRob3Igb2Ygb2RpZyEKCkkgbm90aWNlIHRoYXQgInZlcnNpb24iIGlzIGxpc3Rl ZCBhcyAiPyIgZm9yIG1hbnkgb2YgdGhlIHBhY2thZ2VzIAooaW5jbHVkaW5nIGh0dHA6Ly9kb2Nz Lm1pcmFnZS5pby9pcGFkZHIvaW5kZXguaHRtbCAsIHdoaWNoIHNob3VsZCBoYXZlIGEgCnByb3Bl ciB2ZXJzaW9uIG51bWJlciBvZiB0aGUgZm9ybSB3ZSB1c3VhbGx5IHNlZSBpbiB0aGUgbWFpbiBv cGFtIApyZXBvc2l0b3J5KS4gIFdoYXQncyB0aGUgYmVzdCBwbGFjZSB0byByZXBvcnQgaXNzdWVz IGxpa2UgdGhpcz8gIE1heWJlIAp0aGUgaXNzdWUgdHJhY2tlciBmb3Igb2RpZyBpdHNlbGY/CgpU aGFua3MsCgpNaW5keQoKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fCk1pcmFnZU9TLWRldmVsIG1haWxpbmcgbGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54 ZW5wcm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1h bi9saXN0aW5mby9taXJhZ2Vvcy1kZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 11:00:03 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 11:00:03 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bv0DX-0000hh-QH; 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Fri, 14 Oct 2016 14:51:02 +0100 (BST) From: Anil Madhavapeddy Message-Id: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> Date: Fri, 14 Oct 2016 14:51:01 +0100 To: mirageos-devel Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) X-Mailer: Apple Mail (2.3124) Subject: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" V2UgaGF2ZSBxdWl0ZSBhIGZldyBiYXNlIGxpYnJhcmllcyB0aGF0IHVzZSB0aGUgcGF0dGVybiBv ZgoKdmFsIGZvb19leG4gOiAuLi4gLT4gJ2EKQHJhaXNlcwoKdmFsIGZvbzogLi4uIC0+ICdhIG9w dGlvbgpHb2JibGVzIHRoZSBleGNlcHRpb24gYW5kIHJldHVybnMgU29tZS9Ob25lCgpTaG91bGQg d2UgdGFrZSB0aGUgTWlyYWdlMyBvcHBvcnR1bml0eSB0byBwb3J0IGxpYnJhcmllcyBsaWtlIElw YWRkciB0byB1c2luZyB0aGUgUmVzdWx0IHR5cGUgaW5zdGVhZCwgc28gaXQgd291bGQgYmUKCnZh bCBmb28gOiAuLi4gLT4gKCdhLCBbYE1zZyBvZiBzdHJpbmddKSByZXN1bHQKCmluc3RlYWQsIHVz aW5nIHRoZSBSZXN1bHQgdHlwZT8gIFRoYXQgd291bGQgbGV0IGxpYnJhcmllcyB1c2UgY29tYmlu YXRvcnMgc3VjaCBhcyBScmVzdWx0LCBhbmQgbm90IGdvYmJsZSBlcnJvcnMgZnJvbSBwYXJzaW5n IHNpbGVudGx5LiAgSXQgd291bGQgYmUgYW4gaW5jb21wYXRpYmxlIEFQSSBidW1wIHNvIHdlIHdv dWxkIG5lZWQgdG8gYnVtcCBhbGwgY29uc3VtZXJzIG9mLCBlLmcuIElwYWRkciAgaHR0cDovL2Rv Y3MubWlyYWdlLmlvL2lwYWRkci9JcGFkZHJfdW5peC5WNC5odG1sIHNpbXVsdGFuZW91c2x5LgoK QW5pbAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWly YWdlT1MtZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qu b3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZv L21pcmFnZW9zLWRldmVsCg== From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 13:51:09 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 13:51:09 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bv2t7-0003p2-RI; 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Fri, 14 Oct 2016 14:51:02 +0100 (BST) From: Anil Madhavapeddy Message-Id: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> Date: Fri, 14 Oct 2016 14:51:01 +0100 To: mirageos-devel Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) X-Mailer: Apple Mail (2.3124) Subject: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" V2UgaGF2ZSBxdWl0ZSBhIGZldyBiYXNlIGxpYnJhcmllcyB0aGF0IHVzZSB0aGUgcGF0dGVybiBv ZgoKdmFsIGZvb19leG4gOiAuLi4gLT4gJ2EKQHJhaXNlcwoKdmFsIGZvbzogLi4uIC0+ICdhIG9w dGlvbgpHb2JibGVzIHRoZSBleGNlcHRpb24gYW5kIHJldHVybnMgU29tZS9Ob25lCgpTaG91bGQg d2UgdGFrZSB0aGUgTWlyYWdlMyBvcHBvcnR1bml0eSB0byBwb3J0IGxpYnJhcmllcyBsaWtlIElw YWRkciB0byB1c2luZyB0aGUgUmVzdWx0IHR5cGUgaW5zdGVhZCwgc28gaXQgd291bGQgYmUKCnZh bCBmb28gOiAuLi4gLT4gKCdhLCBbYE1zZyBvZiBzdHJpbmddKSByZXN1bHQKCmluc3RlYWQsIHVz aW5nIHRoZSBSZXN1bHQgdHlwZT8gIFRoYXQgd291bGQgbGV0IGxpYnJhcmllcyB1c2UgY29tYmlu YXRvcnMgc3VjaCBhcyBScmVzdWx0LCBhbmQgbm90IGdvYmJsZSBlcnJvcnMgZnJvbSBwYXJzaW5n IHNpbGVudGx5LiAgSXQgd291bGQgYmUgYW4gaW5jb21wYXRpYmxlIEFQSSBidW1wIHNvIHdlIHdv dWxkIG5lZWQgdG8gYnVtcCBhbGwgY29uc3VtZXJzIG9mLCBlLmcuIElwYWRkciAgaHR0cDovL2Rv Y3MubWlyYWdlLmlvL2lwYWRkci9JcGFkZHJfdW5peC5WNC5odG1sIHNpbXVsdGFuZW91c2x5LgoK QW5pbAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWly YWdlT1MtZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qu b3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZv L21pcmFnZW9zLWRldmVsCg== From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 14:05:22 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 14:05:22 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bv36v-0004hr-CG; 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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=wdkgGYJFeHfpPehGgI3khBPUV0StiB4qwE6HvIXIk18=; b=Y2qokmqTyjg6nvvkpMnpG3DNoaUYYHmd6eoh+IRsRhdqYq7DgPVUYZEunnCc2fOeYv O9Q+m/h5b6SkecVApYnqfKnzbaxpZQ3de28g/oq1Tbwx0JNjhfB+7xdUcplUDqYjp/Je n/ADPmbn4X08MzpWzj2G3padIu1eJ8RF4z9XkpXM+Uj6M1/2PrUYs1Yx5ihf5LcAM7uQ hFQhgm4nVANbOxS1SZ//cEcMHVPq1bAa56/DSwgLAfQFwHYG3/Lsh6ZKE6OaVASG6YG9 Vh8+per2bZ73BgceutwxZadLQvgsLG80+C7sW5QOvLSst2MSAlpQPbpH38BSKiUmKetm Iuog== X-Gm-Message-State: AA6/9Rlb7M1498djXtkA4aMcWmhKnL5GLPlONk5Z5wAbUbOvnax5SLQvyuMk1HpXO6ZUMgTHGGuJ2IV8r40yWw== X-Received: by 10.25.125.4 with SMTP id y4mr3673093lfc.75.1476453916457; Fri, 14 Oct 2016 07:05:16 -0700 (PDT) MIME-Version: 1.0 Received: by 10.25.198.21 with HTTP; Fri, 14 Oct 2016 07:05:15 -0700 (PDT) In-Reply-To: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> From: David Scott Date: Fri, 14 Oct 2016 15:05:15 +0100 Message-ID: To: Anil Madhavapeddy Cc: mirageos-devel Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============2862778932612160545==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============2862778932612160545== Content-Type: multipart/alternative; boundary=001a114af7bc37c830053ed3b7f3 --001a114af7bc37c830053ed3b7f3 Content-Type: text/plain; charset=UTF-8 On Fri, Oct 14, 2016 at 2:51 PM, Anil Madhavapeddy wrote: > We have quite a few base libraries that use the pattern of > > val foo_exn : ... -> 'a > @raises > > val foo: ... -> 'a option > Gobbles the exception and returns Some/None > > Should we take the Mirage3 opportunity to port libraries like Ipaddr to > using the Result type instead, so it would be > > val foo : ... -> ('a, [`Msg of string]) result > > instead, using the Result type? That would let libraries use combinators > such as Rresult, and not gobble errors from parsing silently. It would be > an incompatible API bump so we would need to bump all consumers of, e.g. > Ipaddr http://docs.mirage.io/ipaddr/Ipaddr_unix.V4.html simultaneously. > Personally I like the sound of this-- it's nice to use combinators to parse a more complicated structure and be able to emit something more useful than "None" as an error. Should we write a "recommended conventions" doc or wiki page to include things like `foo_exn` and `foo` examples above? Cheers, Dave > > Anil > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > -- Dave Scott --001a114af7bc37c830053ed3b7f3 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

On Fri, Oct 14, 2016 at 2:51 PM, Anil Madhavapeddy <= anil@recoil.org&g= t; wrote:
We have quite a few ba= se libraries that use the pattern of

val foo_exn : ... -> 'a
@raises

val foo: ... -> 'a option
Gobbles the exception and returns Some/None

Should we take the Mirage3 opportunity to port libraries like Ipaddr to us= ing the Result type instead, so it would be

val foo : ... -> ('a, [`Msg of string]) result

instead, using the Result type?=C2=A0 That would let libraries use combina= tors such as Rresult, and not gobble errors from parsing silently.=C2=A0 I= t would be an incompatible API bump so we would need to bump all consumers= of, e.g. Ipaddr=C2=A0 http://docs.mirage.io/ipadd= r/Ipaddr_unix.V4.html simultaneously.

Personally I like the sound of this-- it's nice to use combin= ators to parse a more complicated structure and be able to emit something = more useful than "None" as an error. Should we write a "rec= ommended conventions" doc or wiki page to include things like `foo_ex= n` and `foo` examples above?

Cheers,
Da= ve
=C2=A0

Anil

_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@list= s.xenproject.org
https://lists.xenproject.org/<= wbr>cgi-bin/mailman/listinfo/mirageos-devel



--
Dave Scott
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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=wdkgGYJFeHfpPehGgI3khBPUV0StiB4qwE6HvIXIk18=; b=Y2qokmqTyjg6nvvkpMnpG3DNoaUYYHmd6eoh+IRsRhdqYq7DgPVUYZEunnCc2fOeYv O9Q+m/h5b6SkecVApYnqfKnzbaxpZQ3de28g/oq1Tbwx0JNjhfB+7xdUcplUDqYjp/Je n/ADPmbn4X08MzpWzj2G3padIu1eJ8RF4z9XkpXM+Uj6M1/2PrUYs1Yx5ihf5LcAM7uQ hFQhgm4nVANbOxS1SZ//cEcMHVPq1bAa56/DSwgLAfQFwHYG3/Lsh6ZKE6OaVASG6YG9 Vh8+per2bZ73BgceutwxZadLQvgsLG80+C7sW5QOvLSst2MSAlpQPbpH38BSKiUmKetm Iuog== X-Gm-Message-State: AA6/9Rlb7M1498djXtkA4aMcWmhKnL5GLPlONk5Z5wAbUbOvnax5SLQvyuMk1HpXO6ZUMgTHGGuJ2IV8r40yWw== X-Received: by 10.25.125.4 with SMTP id y4mr3673093lfc.75.1476453916457; Fri, 14 Oct 2016 07:05:16 -0700 (PDT) MIME-Version: 1.0 Received: by 10.25.198.21 with HTTP; Fri, 14 Oct 2016 07:05:15 -0700 (PDT) In-Reply-To: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> From: David Scott Date: Fri, 14 Oct 2016 15:05:15 +0100 Message-ID: To: Anil Madhavapeddy Cc: mirageos-devel Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============2862778932612160545==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============2862778932612160545== Content-Type: multipart/alternative; boundary=001a114af7bc37c830053ed3b7f3 --001a114af7bc37c830053ed3b7f3 Content-Type: text/plain; charset=UTF-8 On Fri, Oct 14, 2016 at 2:51 PM, Anil Madhavapeddy wrote: > We have quite a few base libraries that use the pattern of > > val foo_exn : ... -> 'a > @raises > > val foo: ... -> 'a option > Gobbles the exception and returns Some/None > > Should we take the Mirage3 opportunity to port libraries like Ipaddr to > using the Result type instead, so it would be > > val foo : ... -> ('a, [`Msg of string]) result > > instead, using the Result type? That would let libraries use combinators > such as Rresult, and not gobble errors from parsing silently. It would be > an incompatible API bump so we would need to bump all consumers of, e.g. > Ipaddr http://docs.mirage.io/ipaddr/Ipaddr_unix.V4.html simultaneously. > Personally I like the sound of this-- it's nice to use combinators to parse a more complicated structure and be able to emit something more useful than "None" as an error. Should we write a "recommended conventions" doc or wiki page to include things like `foo_exn` and `foo` examples above? Cheers, Dave > > Anil > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > -- Dave Scott --001a114af7bc37c830053ed3b7f3 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

On Fri, Oct 14, 2016 at 2:51 PM, Anil Madhavapeddy <= anil@recoil.org&g= t; wrote:
We have quite a few ba= se libraries that use the pattern of

val foo_exn : ... -> 'a
@raises

val foo: ... -> 'a option
Gobbles the exception and returns Some/None

Should we take the Mirage3 opportunity to port libraries like Ipaddr to us= ing the Result type instead, so it would be

val foo : ... -> ('a, [`Msg of string]) result

instead, using the Result type?=C2=A0 That would let libraries use combina= tors such as Rresult, and not gobble errors from parsing silently.=C2=A0 I= t would be an incompatible API bump so we would need to bump all consumers= of, e.g. Ipaddr=C2=A0 http://docs.mirage.io/ipadd= r/Ipaddr_unix.V4.html simultaneously.

Personally I like the sound of this-- it's nice to use combin= ators to parse a more complicated structure and be able to emit something = more useful than "None" as an error. Should we write a "rec= ommended conventions" doc or wiki page to include things like `foo_ex= n` and `foo` examples above?

Cheers,
Da= ve
=C2=A0

Anil

_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@list= s.xenproject.org
https://lists.xenproject.org/<= wbr>cgi-bin/mailman/listinfo/mirageos-devel



--
Dave Scott
--001a114af7bc37c830053ed3b7f3-- --===============2862778932612160545== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============2862778932612160545==-- From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 14:08:22 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 14:08:22 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bv39o-0004ri-Mk; Fri, 14 Oct 2016 14:08:20 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bv39n-0004rb-Ep for mirageos-devel@lists.xenproject.org; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 26023 invoked from network); 14 Oct 2016 14:15:43 -0000 Received: from ppsw-40.csi.cam.ac.uk (HELO ppsw-40.csi.cam.ac.uk) (131.111.8.140) by server-10.tower-31.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 14 Oct 2016 14:15:43 -0000 X-Cam-AntiVirus: no malware found X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/ Received: from [194.72.166.2] (port=62711 helo=[172.16.10.198]) by ppsw-40.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.158]:587) with esmtpsa (PLAIN:amc79) (TLSv1:ECDHE-RSA-AES256-SHA:256) id 1bv3Gx-000yzJ-jW (Exim 4.86_36-e07b163) (return-path ); Fri, 14 Oct 2016 15:15:43 +0100 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) From: Amir Chaudhry In-Reply-To: Date: Fri, 14 Oct 2016 15:15:42 +0100 Message-Id: <7FCAD70E-9915-4EDB-8268-7461E63344BC@cam.ac.uk> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> To: Richard Mortier X-Mailer: Apple Mail (2.2104) Cc: mirageos-devel , Anil Madhavapeddy Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 26209 invoked from network); 14 Oct 2016 14:24:00 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-7.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 14 Oct 2016 14:24:00 -0000 Received: from bark.recoil.org (localhost [127.0.0.1]) by bark.recoil.org (OpenSMTPD) with ESMTP id c17b7c10; Fri, 14 Oct 2016 15:23:59 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= selector1; bh=i3aiGxA6eLOMt3eV7CFMYBmxo5A=; b=wvGs+ONbk0lFFzrwqk Gi8b7e5hocJCOD7M/6VidHyUt8P8PXmJeL+dHOcCvJxoKPTWVUI07K4FBQaEcZgX wFBZwaV+xJCLlx6NvGEfMeOvSLhbkgQl+W3rQfvvkJ8O1xYcbEEimqE5xeZh0eaH 6hy3l5HgQHvt35Fqad5g9WIDo= DomainKey-Signature: a=rsa-sha1; c=nofws; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 65218 invoked from network); 14 Oct 2016 14:31:29 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-9.tower-21.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 14 Oct 2016 14:31:29 -0000 Received: from [128.232.110.111] (c111.al.cl.cam.ac.uk [128.232.110.111]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id 014B21B26 for ; Fri, 14 Oct 2016 16:31:28 +0200 (CEST) References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> To: mirageos-devel@lists.xenproject.org From: Hannes Mehnert Message-ID: <46bc4484-d960-a7db-1fb4-29d1fed076b6@mehnert.org> Date: Fri, 14 Oct 2016 15:31:03 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" W2FnYWluIHJhaXNpbmcgdGhlIGlzc3VlOiBjb3VsZCBzb21lIG1haWxpbmcgbGlzdCBhZG1pbiBw bGVhc2Ugc2V0IHRoZQpyZXBseS10byB0byB0aGUgbGlzdCAtLSB0aGVyZSdzIG5vIG5lZWQgdG8g c2VuZCB0aGUgbWVzc2FnZSB0byB0aGUKaW5kaXZpZHVhbCBhbmQgdG8gdGhlIGxpc3QhXQoKT24g MTQvMTAvMjAxNiAxNToyMywgQW5pbCBNYWRoYXZhcGVkZHkgd3JvdGU6Cj4gT24gMTQgT2N0IDIw MTYsIGF0IDE1OjExLCBIYW5uZXMgTWVobmVydCA8aGFubmVzQG1laG5lcnQub3JnPiB3cm90ZToK Pj4KPj4gT24gMTQvMTAvMjAxNiAxNTowOCwgQW5pbCBNYWRoYXZhcGVkZHkgd3JvdGU6Cj4+PiBZ ZWFoLCBvbmNlIHdlIGFncmVlIG9uIHRoZSBjb252ZW50aW9ucyA6LSkgIE9uY2Ugd2UgaGF2ZSBl dmVyeXRoaW5nIHVzaW5nIFJlc3VsdC50LCB3ZSBhbHNvIG5lZWQgdG8gZmluZCB0aGUgcmlnaHQg c2V0IG9mIGNvbWJpbmF0b3JzLgo+Pj4KPj4+IC0gVGhlcmUgaXMgUnJlc3VsdCBmb3IgYmFzaWMg UmVzdWx0LnQgaGFuZGxpbmc6IGh0dHA6Ly9lcnJhdGlxdWUuY2gvc29mdHdhcmUvcnJlc3VsdC9k b2MvUnJlc3VsdC5odG1sCj4+PiAtIEx3dF9yZXN1bHQgaGFzIGEgc2xpZ2h0bHkgZGlmZmVyZW50 IHNldCBvZiBjb21iaW5hdG9ycyBodHRwczovL2dpdGh1Yi5jb20vb2NzaWdlbi9sd3QvYmxvYi9t YXN0ZXIvc3JjL2NvcmUvbHd0X3Jlc3VsdC5tbGkKPj4+Cj4+PiBTbyBJIGd1ZXNzIHdlIG5lZWQg dG8gZGVjaWRlIGlmIHdlIHB1Ymxpc2ggYW4gUnJlc3VsdF9sd3QudCB3aGljaCBsaWZ0cyB1cCAi KCdhLCdiKSByZXN1bHQiIGludG8gYW4gTHd0LnQgd2l0aCB0aGUgc2FtZSBBUEkgYXMgUnJlc3Vs dCBvdGhlcndpc2UuCj4+Cj4+IEJhc2VkIG9uIGVhcmxpZXIgZGlzY3Vzc2lvbiBmcm9tIEphbnVh cnkgMjAxNSwgSSBwdXQgc29tZSBjb21iaW5hdG9ycyBpbgo+PiBtaXJhZ2UtdHlwZXMubHd0ICht YXliZSB0aGV5IHNob3VsZCBsaXZlIGVsc2V3aGVyZSkKPj4gaHR0cHM6Ly9naXRodWIuY29tL2hh bm5lc20vbWlyYWdlL2Jsb2IvbmV0d29yay1lcnJvci90eXBlcy9ydW50aW1lLmx3dC9tX2luZml4 Lm1saQo+IAo+IEFoLCBtaXNzZWQgdGhvc2UsIHRoYW5rcyEKPiAKPiBMb29rcyBsaWtlIHdlIGhh dmUgYSBudW1iZXIgb2YgZGlmZmVyZW50IGNvbnZlbnRpb25zIGZvciB0aGUgYmluZHMuICBEbyB3 ZSB3YW50IHRvIGhhdmUgdGhlIHNhbWUgc2V0IG9mIG9wZXJhdG9ycyB3aXRoIGFuZCB3aXRob3V0 IEx3dCBzdXBwb3J0IChhbmQgb3BlbiB0aGUgSW5maXggbW9kdWxlIGxvY2FsbHkgYXMgbmVlZGVk KSBvciBzZXBhcmF0ZSBvcGVyYXRvcnMgdGhhdCBiZSB1c2VkIGFsb25nc2lkZSBlYWNoIG90aGVy PwoKTXkgZXhwZXJpZW5jZSAocmVhZGluZyBvdGhlciBwZW9wbGUncyBjb2RlLCBzZWUgZS5nLiBb MF0pIGlzIHRoYXQKb3ZlcmxvYWRpbmcgdGhlIHN5bnRheCBvZiBiaW5kIGlzIGJhZCwgc2luY2Ug aXQgaXMgaGFyZCB0byBjb21wcmVoZW5kCmxvY2FsbHkuCgpDZXJ0YWlubHksIHB1cmUgbGlicmFy aWVzIG5vdCB1c2luZyBMd3QgY2FuIGVhc2lseSByZXVzZSA+Pj0gYW5kID58PSwKYnV0IGFzIHNv b24gYXMgeW91IGRlcGVuZCBvbiBib3RoIEx3dC50IGFuZCByZXN1bHQsIEknZCBwcmVmZXIgdG8g aGF2ZQpuZXcgY2hhcmFjdGVyIHNlcXVlbmNlcyBmb3IgdGhlIGJpbmRzIChhbmQgbm90IG51bWVy b3VzIGBsZXQgb3BlbiBfX18KaW5gKS4gIFRoZSA+Pj0/IGFuZCA+Pnw/IG9yaWdpbmF0ZSBmcm9t IEFzaGlzaCcgc3VnZ2VzdGlvbgooaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9hcmNoaXZl cy9odG1sL21pcmFnZW9zLWRldmVsLzIwMTUtMDIvbXNnMDAwMTkuaHRtbCkKLS0gSSdtIG9wZW4g dG8gYW55IHN1Z2dlc3Rpb25zIGFib3V0IHRoZSBzcGVjaWZpYyBjaGFyYWN0ZXIgc2VxdWVuY2Vz LAphcyBsb25nIGFzIHdlIGNhbiBhZ3JlZSBvbiBzb21lLgoKCmhhbm5lcwoKMDoKaHR0cHM6Ly9n aXRodWIuY29tL21pcmFnZS9vY2FtbC1mYXQvcHVsbC80Ny9maWxlcyNkaWZmLWI4MWU5ZGFiNmNi NGNlYTJjZTRiMmQ1MGZmY2Q2NjBkTDE1OQoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KTWlyYWdlT1MtZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRl dmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dp LWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFnZW9zLWRldmVsCg== From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 14:31:33 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 14:31:33 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bv3WF-0006nV-W1; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 65218 invoked from network); 14 Oct 2016 14:31:29 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-9.tower-21.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 14 Oct 2016 14:31:29 -0000 Received: from [128.232.110.111] (c111.al.cl.cam.ac.uk [128.232.110.111]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id 014B21B26 for ; Fri, 14 Oct 2016 16:31:28 +0200 (CEST) References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> To: mirageos-devel@lists.xenproject.org From: Hannes Mehnert Message-ID: <46bc4484-d960-a7db-1fb4-29d1fed076b6@mehnert.org> Date: Fri, 14 Oct 2016 15:31:03 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" W2FnYWluIHJhaXNpbmcgdGhlIGlzc3VlOiBjb3VsZCBzb21lIG1haWxpbmcgbGlzdCBhZG1pbiBw bGVhc2Ugc2V0IHRoZQpyZXBseS10byB0byB0aGUgbGlzdCAtLSB0aGVyZSdzIG5vIG5lZWQgdG8g c2VuZCB0aGUgbWVzc2FnZSB0byB0aGUKaW5kaXZpZHVhbCBhbmQgdG8gdGhlIGxpc3QhXQoKT24g MTQvMTAvMjAxNiAxNToyMywgQW5pbCBNYWRoYXZhcGVkZHkgd3JvdGU6Cj4gT24gMTQgT2N0IDIw MTYsIGF0IDE1OjExLCBIYW5uZXMgTWVobmVydCA8aGFubmVzQG1laG5lcnQub3JnPiB3cm90ZToK Pj4KPj4gT24gMTQvMTAvMjAxNiAxNTowOCwgQW5pbCBNYWRoYXZhcGVkZHkgd3JvdGU6Cj4+PiBZ ZWFoLCBvbmNlIHdlIGFncmVlIG9uIHRoZSBjb252ZW50aW9ucyA6LSkgIE9uY2Ugd2UgaGF2ZSBl dmVyeXRoaW5nIHVzaW5nIFJlc3VsdC50LCB3ZSBhbHNvIG5lZWQgdG8gZmluZCB0aGUgcmlnaHQg c2V0IG9mIGNvbWJpbmF0b3JzLgo+Pj4KPj4+IC0gVGhlcmUgaXMgUnJlc3VsdCBmb3IgYmFzaWMg UmVzdWx0LnQgaGFuZGxpbmc6IGh0dHA6Ly9lcnJhdGlxdWUuY2gvc29mdHdhcmUvcnJlc3VsdC9k b2MvUnJlc3VsdC5odG1sCj4+PiAtIEx3dF9yZXN1bHQgaGFzIGEgc2xpZ2h0bHkgZGlmZmVyZW50 IHNldCBvZiBjb21iaW5hdG9ycyBodHRwczovL2dpdGh1Yi5jb20vb2NzaWdlbi9sd3QvYmxvYi9t YXN0ZXIvc3JjL2NvcmUvbHd0X3Jlc3VsdC5tbGkKPj4+Cj4+PiBTbyBJIGd1ZXNzIHdlIG5lZWQg dG8gZGVjaWRlIGlmIHdlIHB1Ymxpc2ggYW4gUnJlc3VsdF9sd3QudCB3aGljaCBsaWZ0cyB1cCAi KCdhLCdiKSByZXN1bHQiIGludG8gYW4gTHd0LnQgd2l0aCB0aGUgc2FtZSBBUEkgYXMgUnJlc3Vs dCBvdGhlcndpc2UuCj4+Cj4+IEJhc2VkIG9uIGVhcmxpZXIgZGlzY3Vzc2lvbiBmcm9tIEphbnVh cnkgMjAxNSwgSSBwdXQgc29tZSBjb21iaW5hdG9ycyBpbgo+PiBtaXJhZ2UtdHlwZXMubHd0ICht YXliZSB0aGV5IHNob3VsZCBsaXZlIGVsc2V3aGVyZSkKPj4gaHR0cHM6Ly9naXRodWIuY29tL2hh bm5lc20vbWlyYWdlL2Jsb2IvbmV0d29yay1lcnJvci90eXBlcy9ydW50aW1lLmx3dC9tX2luZml4 Lm1saQo+IAo+IEFoLCBtaXNzZWQgdGhvc2UsIHRoYW5rcyEKPiAKPiBMb29rcyBsaWtlIHdlIGhh dmUgYSBudW1iZXIgb2YgZGlmZmVyZW50IGNvbnZlbnRpb25zIGZvciB0aGUgYmluZHMuICBEbyB3 ZSB3YW50IHRvIGhhdmUgdGhlIHNhbWUgc2V0IG9mIG9wZXJhdG9ycyB3aXRoIGFuZCB3aXRob3V0 IEx3dCBzdXBwb3J0IChhbmQgb3BlbiB0aGUgSW5maXggbW9kdWxlIGxvY2FsbHkgYXMgbmVlZGVk KSBvciBzZXBhcmF0ZSBvcGVyYXRvcnMgdGhhdCBiZSB1c2VkIGFsb25nc2lkZSBlYWNoIG90aGVy PwoKTXkgZXhwZXJpZW5jZSAocmVhZGluZyBvdGhlciBwZW9wbGUncyBjb2RlLCBzZWUgZS5nLiBb MF0pIGlzIHRoYXQKb3ZlcmxvYWRpbmcgdGhlIHN5bnRheCBvZiBiaW5kIGlzIGJhZCwgc2luY2Ug aXQgaXMgaGFyZCB0byBjb21wcmVoZW5kCmxvY2FsbHkuCgpDZXJ0YWlubHksIHB1cmUgbGlicmFy aWVzIG5vdCB1c2luZyBMd3QgY2FuIGVhc2lseSByZXVzZSA+Pj0gYW5kID58PSwKYnV0IGFzIHNv b24gYXMgeW91IGRlcGVuZCBvbiBib3RoIEx3dC50IGFuZCByZXN1bHQsIEknZCBwcmVmZXIgdG8g aGF2ZQpuZXcgY2hhcmFjdGVyIHNlcXVlbmNlcyBmb3IgdGhlIGJpbmRzIChhbmQgbm90IG51bWVy b3VzIGBsZXQgb3BlbiBfX18KaW5gKS4gIFRoZSA+Pj0/IGFuZCA+Pnw/IG9yaWdpbmF0ZSBmcm9t IEFzaGlzaCcgc3VnZ2VzdGlvbgooaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9hcmNoaXZl cy9odG1sL21pcmFnZW9zLWRldmVsLzIwMTUtMDIvbXNnMDAwMTkuaHRtbCkKLS0gSSdtIG9wZW4g dG8gYW55IHN1Z2dlc3Rpb25zIGFib3V0IHRoZSBzcGVjaWZpYyBjaGFyYWN0ZXIgc2VxdWVuY2Vz LAphcyBsb25nIGFzIHdlIGNhbiBhZ3JlZSBvbiBzb21lLgoKCmhhbm5lcwoKMDoKaHR0cHM6Ly9n aXRodWIuY29tL21pcmFnZS9vY2FtbC1mYXQvcHVsbC80Ny9maWxlcyNkaWZmLWI4MWU5ZGFiNmNi NGNlYTJjZTRiMmQ1MGZmY2Q2NjBkTDE1OQoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KTWlyYWdlT1MtZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRl dmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dp LWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFnZW9zLWRldmVsCg== From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 14:31:34 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 14:31:34 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bv3WI-0006nx-1w; 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Fri, 14 Oct 2016 16:31:22 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> From: Mindy Message-ID: <545dd163-d36f-1193-deac-e8ba2c218011@somerandomidiot.com> Date: Fri, 14 Oct 2016 09:31:22 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTAvMTQvMjAxNiAwOTowOCBBTSwgUmljaGFyZCBNb3J0aWVyIHdyb3RlOgoKPiBPbiAxNCBP Y3RvYmVyIDIwMTYgYXQgMTQ6NTEsIEFuaWwgTWFkaGF2YXBlZGR5IDxhbmlsQHJlY29pbC5vcmc+ IHdyb3RlOgo+PiBTaG91bGQgd2UgdGFrZSB0aGUgTWlyYWdlMyBvcHBvcnR1bml0eSB0byBwb3J0 IGxpYnJhcmllcyBsaWtlIElwYWRkciB0byB1c2luZyB0aGUgUmVzdWx0IHR5cGUgaW5zdGVhZAo+ IEkgdGhpbmsgdGhhdCB3b3VsZCBiZSBhIGdvb2QgdGhpbmctLSBvbmx5IGNvbmNlcm4gd291bGQg YmUgaG93IG11Y2ggaXQKPiB3b3VsZCBkZWxheSB0aGUgcmVsZWFzZT8KPgo+IChEbyB3ZSBoYXZl IGEgdGltZWxpbmUgZm9yIHRoYXQgaW4gZmFjdD8pCj4KClVuc29sdmVkIGJsb2NrZXJzIGZvciB0 aGUgTWlyYWdlT1MgMyBtYWluIHJlbGVhc2U6CiogY29pbnN0YWxsYWJpbGl0eSBvZiBzb2xvNSBh bmQgeGVuIG9uIHRoZSBzYW1lIG9wYW0gc3dpdGNoCiogZXhwcmVzc2lvbiBvZiBsaWJyYXJ5IHZl cnNpb24gZGVwZW5kZW5jaWVzIGluIHVuaWtlcm5lbCBjb25maWd1cmF0aW9uCgpCbG9ja2VycyBm b3IgYSBNaXJhZ2VPUyAzIGJldGEgcmVsZWFzZSAoYnkgd2hpY2ggSSBtZWFuLCBhIHRhZyBzZXQg b24gYSAKdmVyc2lvbiBvZiBvdXIgQVBJcyB0aGF0IGFyZSB1bmxpa2VseSB0byBjaGFuZ2UgZHJh c3RpY2FsbHkgYmVmb3JlIG1ham9yIApyZWxlYXNlKToKKiBtYWpvciBjaGFuZ2VzIHRvIHJldHVy biB0eXBlcyBhbmQgZXJyb3Igc2lnbmFsbGluZyBpbiBtYW55IG9mIHRoZSAKZnVuY3Rpb25zIGlu IG1pcmFnZS10eXBlcy4KCk1vcmUgZ2VuZXJhbGx5LCB5b3UgY2FuIHZpZXcgdGhlIHN0YXR1cyBv ZiB3b3JrIG5lZWRlZCBmb3IgTWlyYWdlT1MgMyBhdCAKaHR0cHM6Ly9naXRodWIuY29tL21pcmFn ZS9taXJhZ2UvaXNzdWVzLzU5MiAuCgpUaGFua3MsCk1pbmR5CgpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwpNaXJhZ2VPUy1kZXZlbCBtYWlsaW5nIGxpc3QK TWlyYWdlT1MtZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9q ZWN0Lm9yZy9jZ2ktYmluL21haWxtYW4vbGlzdGluZm8vbWlyYWdlb3MtZGV2ZWwK From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 14:31:34 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 14:31:34 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bv3WI-0006nx-1w; 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Fri, 14 Oct 2016 16:31:22 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> From: Mindy Message-ID: <545dd163-d36f-1193-deac-e8ba2c218011@somerandomidiot.com> Date: Fri, 14 Oct 2016 09:31:22 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTAvMTQvMjAxNiAwOTowOCBBTSwgUmljaGFyZCBNb3J0aWVyIHdyb3RlOgoKPiBPbiAxNCBP Y3RvYmVyIDIwMTYgYXQgMTQ6NTEsIEFuaWwgTWFkaGF2YXBlZGR5IDxhbmlsQHJlY29pbC5vcmc+ IHdyb3RlOgo+PiBTaG91bGQgd2UgdGFrZSB0aGUgTWlyYWdlMyBvcHBvcnR1bml0eSB0byBwb3J0 IGxpYnJhcmllcyBsaWtlIElwYWRkciB0byB1c2luZyB0aGUgUmVzdWx0IHR5cGUgaW5zdGVhZAo+ IEkgdGhpbmsgdGhhdCB3b3VsZCBiZSBhIGdvb2QgdGhpbmctLSBvbmx5IGNvbmNlcm4gd291bGQg YmUgaG93IG11Y2ggaXQKPiB3b3VsZCBkZWxheSB0aGUgcmVsZWFzZT8KPgo+IChEbyB3ZSBoYXZl IGEgdGltZWxpbmUgZm9yIHRoYXQgaW4gZmFjdD8pCj4KClVuc29sdmVkIGJsb2NrZXJzIGZvciB0 aGUgTWlyYWdlT1MgMyBtYWluIHJlbGVhc2U6CiogY29pbnN0YWxsYWJpbGl0eSBvZiBzb2xvNSBh bmQgeGVuIG9uIHRoZSBzYW1lIG9wYW0gc3dpdGNoCiogZXhwcmVzc2lvbiBvZiBsaWJyYXJ5IHZl cnNpb24gZGVwZW5kZW5jaWVzIGluIHVuaWtlcm5lbCBjb25maWd1cmF0aW9uCgpCbG9ja2VycyBm b3IgYSBNaXJhZ2VPUyAzIGJldGEgcmVsZWFzZSAoYnkgd2hpY2ggSSBtZWFuLCBhIHRhZyBzZXQg b24gYSAKdmVyc2lvbiBvZiBvdXIgQVBJcyB0aGF0IGFyZSB1bmxpa2VseSB0byBjaGFuZ2UgZHJh c3RpY2FsbHkgYmVmb3JlIG1ham9yIApyZWxlYXNlKToKKiBtYWpvciBjaGFuZ2VzIHRvIHJldHVy biB0eXBlcyBhbmQgZXJyb3Igc2lnbmFsbGluZyBpbiBtYW55IG9mIHRoZSAKZnVuY3Rpb25zIGlu IG1pcmFnZS10eXBlcy4KCk1vcmUgZ2VuZXJhbGx5LCB5b3UgY2FuIHZpZXcgdGhlIHN0YXR1cyBv ZiB3b3JrIG5lZWRlZCBmb3IgTWlyYWdlT1MgMyBhdCAKaHR0cHM6Ly9naXRodWIuY29tL21pcmFn ZS9taXJhZ2UvaXNzdWVzLzU5MiAuCgpUaGFua3MsCk1pbmR5CgpfX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fXwpNaXJhZ2VPUy1kZXZlbCBtYWlsaW5nIGxpc3QK TWlyYWdlT1MtZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9q ZWN0Lm9yZy9jZ2ktYmluL21haWxtYW4vbGlzdGluZm8vbWlyYWdlb3MtZGV2ZWwK From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 14:33:15 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 14:33:15 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bv3Xv-0006ul-7y; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 8773 invoked from network); 14 Oct 2016 14:33:13 -0000 Received: from mail6.webfaction.com (HELO smtp.webfaction.com) (74.55.86.74) by server-6.tower-21.messagelabs.com with DHE-RSA-AES256-SHA encrypted SMTP; 14 Oct 2016 14:33:13 -0000 Received: from [192.168.5.177] (218-57.dsl.iskon.hr [89.164.218.57]) by smtp.webfaction.com (Postfix) with ESMTP id D4C6020E7BFF; Fri, 14 Oct 2016 14:33:10 +0000 (UTC) Date: Fri, 14 Oct 2016 16:33:08 +0200 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: Anil Madhavapeddy Message-ID: In-Reply-To: <209FF3CD-5F07-427F-8398-C78877976067@recoil.org> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <209FF3CD-5F07-427F-8398-C78877976067@recoil.org> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: mirageos-devel Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 8773 invoked from network); 14 Oct 2016 14:33:13 -0000 Received: from mail6.webfaction.com (HELO smtp.webfaction.com) (74.55.86.74) by server-6.tower-21.messagelabs.com with DHE-RSA-AES256-SHA encrypted SMTP; 14 Oct 2016 14:33:13 -0000 Received: from [192.168.5.177] (218-57.dsl.iskon.hr [89.164.218.57]) by smtp.webfaction.com (Postfix) with ESMTP id D4C6020E7BFF; Fri, 14 Oct 2016 14:33:10 +0000 (UTC) Date: Fri, 14 Oct 2016 16:33:08 +0200 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: Anil Madhavapeddy Message-ID: In-Reply-To: <209FF3CD-5F07-427F-8398-C78877976067@recoil.org> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <209FF3CD-5F07-427F-8398-C78877976067@recoil.org> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: mirageos-devel Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 37783 invoked from network); 14 Oct 2016 14:36:48 -0000 Received: from mail-lf0-f65.google.com (HELO mail-lf0-f65.google.com) (209.85.215.65) by server-3.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 14 Oct 2016 14:36:48 -0000 Received: by mail-lf0-f65.google.com with SMTP id x23so12693299lfi.1 for ; Fri, 14 Oct 2016 07:36:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=YuLVCJHbpkQQohbp65txGWMn9Q/dQybnqn2hTPLhq9g=; b=IU0Rvx8iYYW9YjxvIG9w8cEefPmJ5zWVlCepB+b/U6LgOE0YBpulqT3dgSqGrt4Kmi UipNdiUHt48bkMWTFlaoLJnBzUAnUxEZTIrMjLw5lCedjdDtEO/wgvxGYglnFUGRCROt NGMhZW8rnhPvXFi+QDfZp14sQXUhQJYQqKQi4EWSYUdNnmkSlwhY8ujCQyyUDCbUy6My ufxtoqwWh3Nu9Gd9yRAQM7dP80LyZUnw2C8tBy0AqMP+HBEt6xjQE/pLgItn0zIyXHra YSri9i2i1vPfI0/IhqlmIy5C+ptQLeB39eDr1uboJOc3Kn+WlbD9qm06w50Hpmz2K7+v hT9A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=YuLVCJHbpkQQohbp65txGWMn9Q/dQybnqn2hTPLhq9g=; b=f3oZJaidivVXp1m69VdVkmI6ZhN2lagQYqJBCdrnftBPTy1GHzX158LbNoVPSvlw/+ iensYKVj53eLyXqwA7ydpwVhDPKmX1AsARUjYr/qiRgrKtox06xjNldTXTHPSh6Yxfkt cZJWHR/OkTJD+iCu409ckFuvvhzgglFXCF6mhzrUlYAoa5IFqetbPmMmjyt6QIC4SGo6 zGiz373q651X09+y/yxH/qyygBxzYctC4/qm9lrT4/olVGXMVMmIIMyYVkFbx4T0X9P5 Bj3FNrwA/KDIcnsFqR5slPagORiXFdxIL5lNVW59MFc2FZwA4OUgSb5d+3v11frjG8yL Q16Q== X-Gm-Message-State: AA6/9Rk7SJx5m1C4WOe4bp2CSgaAjOPBSnFD7V2Jt92NYQbvzk2WnKgOHJ3IVqa9OpfZ3ihjxLZKlyFxv3CVww== X-Received: by 10.25.198.9 with SMTP id w9mr4235282lff.164.1476455808210; Fri, 14 Oct 2016 07:36:48 -0700 (PDT) MIME-Version: 1.0 Received: by 10.25.198.21 with HTTP; Fri, 14 Oct 2016 07:36:47 -0700 (PDT) In-Reply-To: <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> From: David Scott Date: Fri, 14 Oct 2016 15:36:47 +0100 Message-ID: To: Anil Madhavapeddy Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1980545602544704502==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============1980545602544704502== Content-Type: multipart/alternative; boundary=94eb2c1a0a0af99b99053ed427f9 --94eb2c1a0a0af99b99053ed427f9 Content-Type: text/plain; charset=UTF-8 On Fri, Oct 14, 2016 at 3:23 PM, Anil Madhavapeddy wrote: > On 14 Oct 2016, at 15:11, Hannes Mehnert wrote: > > > > On 14/10/2016 15:08, Anil Madhavapeddy wrote: > >> Yeah, once we agree on the conventions :-) Once we have everything > using Result.t, we also need to find the right set of combinators. > >> > >> - There is Rresult for basic Result.t handling: > http://erratique.ch/software/rresult/doc/Rresult.html > >> - Lwt_result has a slightly different set of combinators > https://github.com/ocsigen/lwt/blob/master/src/core/lwt_result.mli > >> > >> So I guess we need to decide if we publish an Rresult_lwt.t which lifts > up "('a,'b) result" into an Lwt.t with the same API as Rresult otherwise. > > > > Based on earlier discussion from January 2015, I put some combinators in > > mirage-types.lwt (maybe they should live elsewhere) > > https://github.com/hannesm/mirage/blob/network-error/ > types/runtime.lwt/m_infix.mli > > Ah, missed those, thanks! > They do look useful :) > > Looks like we have a number of different conventions for the binds. Do we > want to have the same set of operators with and without Lwt support (and > open the Infix module locally as needed) or separate operators that be used > alongside each other? > I'm curious what people recommend here -- I'm certainly open to adopting a common convention even if it involves a bit of churn. Initially I kept minting my own infix operators (like `>>*=` `>>|=`) but it quickly got confusing for me and I probably didn't name them uniformly across projects. Recently I've stuck to `>>=` and have put different ones in different modules like this: ``` module LwtResult = struct let (>>=) m f = end ``` and now my code looks like (sometimes with extra newlines, but I don't have strong opinions about that) ``` let open Lwt.Infix in f () >>= fun () -> let open LwtResult in g () >>= fun () -> Lwt.return (Result.Ok ()) (* possibly should define `return` in the module too *) ``` Part of my rationale for using the same bind was a hope that one day modular implicits might automatically choose the right version and I could lose the `let open` but maybe this isn't possible? Cheers, Dave --94eb2c1a0a0af99b99053ed427f9 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Fri, Oct 14, 2016 at 3:23 PM, Anil Madhavapeddy &l= t;anil@recoil.org&= gt; wrote:
On 14 = Oct 2016, at 15:11, Hannes Mehnert <hannes@mehnert.org> wrote:
>
> On 14/10/2016 15:08, Anil Madhavapeddy wrote:
>> Yeah, once we agree on the conventions :-)= =C2=A0 Once we have everything using Result.t, we also need to find the rig= ht set of combinators.
>>
>> - There is Rresult for basic Result.t handling: http://erratique.ch/software/rresult/doc/Rresult.html<= br> >> - Lwt_result has a slightly different set of combinators https://github.com/ocsigen/lwt/blob/= master/src/core/lwt_result.mli
>>
>> So I guess we need to decide if we publish an Rresult_lwt.t which = lifts up "('a,'b) result" into an Lwt.t with the same API= as Rresult otherwise.
>
> Based on earlier discussion from January 2015, I put some combinators = in
> mirage-types.lwt (maybe they should live elsewhere)
> https://githu= b.com/hannesm/mirage/blob/network-error/types/runtime.lwt/m_infix= .mli

Ah, missed those, thanks!

They d= o look useful :)
=C2=A0

Looks like we have a number of different conventions for the binds.=C2=A0 D= o we want to have the same set of operators with and without Lwt support (a= nd open the Infix module locally as needed) or separate operators that be u= sed alongside each other?

I'm curio= us what people recommend here -- I'm certainly open to adopting a commo= n convention even if it involves a bit of churn.

I= nitially I kept minting my own infix operators (like `>>*=3D` `>&g= t;|=3D`) but it quickly got confusing for me and I probably didn't name= them uniformly across projects. Recently I've stuck to `>>=3D` a= nd have put different ones in different modules like this:

```
module LwtResult =3D struct
=C2=A0 let (&g= t;>=3D) m f =3D
end
```

and= now my code looks like (sometimes with extra newlines, but I don't hav= e strong opinions about that)
```
let open Lwt.Infix in=
f () >>=3D fun () ->
let open LwtResult in
g () >>=3D fun () ->
Lwt.return (Result.Ok ()) (= * possibly should define `return` in the module too *)
```
<= div>Part of my rationale for using the same bind was a hope that one day mo= dular implicits might automatically choose the right version and I could lo= se the `let open` but maybe this isn't possible?

Cheers,
Dave
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Fri, 14 Oct 2016 14:36:53 +0000 Received: from [85.158.137.68] by server-9.bemta-3.messagelabs.com id BB/29-27233-48DE0085; Fri, 14 Oct 2016 14:36:52 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrGIsWRWlGSWpSXmKPExsVyMfS6o27DW4Y Ig/7V1ha9rXdZHBg9Dn+4whLAGMWamZeUX5HAmrH27AOmgtf6Fe2nfjM2MO7X7GLk4hASmMso MW3Ta6YuRk4OFoEGVonnOyNAbAmBOawSE1oEIOwciS9337JC2AUS28/+BbN5BQQlTs58wgJiC wl4SdztuQ02h1PATmL+oz3sEAvmMEmc2XKTHSTBJqAmcWPfDBaIZaoS5/+eZIQYFCBxpncXM4 gtLOApsWH6LrAFIgLqEs1bToANZRYok/iwcj4bhO0l8fPsQfYJjAKzkNwxC0lqFiMHkK0usX6 eEERYTeL2tqvsELa2xLKFr5kXMLKuYtQoTi0qSy3SNTLSSyrKTM8oyU3MzNE1NDDWy00tLk5M T81JTCrWS87P3cQIDOd6BgbGHYxTT/gdYpTkYFIS5a3VY4gQ4kvKT6nMSCzOiC8qzUktPsQow 8GhJMGb+AYoJ1iUmp5akZaZA4wsmLQEB4+SCG8/SJq3uCAxtzgzHSJ1itGSY8vva2uZOI7NvQ Ekt029t5ZJiCUvPy9VSpzXCaRBAKQhozQPbhws+i8xykoJ8zIyMDAI8RSkFuVmlqDKv2IU52B UEuaNApnCk5lXArf1FdBBTEAHfWgDO6gkESEl1cDY0cH8P7XCw/PZ9Lr/a1inHdzmqtwv9NB1 8z/PGRGcL1MMVi+aZvv1RJ/MmytbmrwlP+7V3po07fbXH6ffNMiFtqdf6VXxKwx2cprbF2HxO 3YJa/qLKYKTJfql10runROlGLjTaYpkjnj868rkhx6bryhESYhN0L3bnOv09lrhzhlN5ozpbG +VWIozEg21mIuKEwFlQJ6g+QIAAA== X-Env-Sender: scott.dj@gmail.com X-Msg-Ref: server-3.tower-31.messagelabs.com!1476455808!66180306!1 X-Originating-IP: [209.85.215.65] X-SpamReason: No, hits=0.9 required=7.0 tests=BODY_RANDOM_LONG, HTML_30_40,HTML_MESSAGE,RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 8.84; banners=-,-,- X-VirusChecked: Checked Received: (qmail 37783 invoked from network); 14 Oct 2016 14:36:48 -0000 Received: from mail-lf0-f65.google.com (HELO mail-lf0-f65.google.com) (209.85.215.65) by server-3.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 14 Oct 2016 14:36:48 -0000 Received: by mail-lf0-f65.google.com with SMTP id x23so12693299lfi.1 for ; Fri, 14 Oct 2016 07:36:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=YuLVCJHbpkQQohbp65txGWMn9Q/dQybnqn2hTPLhq9g=; b=IU0Rvx8iYYW9YjxvIG9w8cEefPmJ5zWVlCepB+b/U6LgOE0YBpulqT3dgSqGrt4Kmi UipNdiUHt48bkMWTFlaoLJnBzUAnUxEZTIrMjLw5lCedjdDtEO/wgvxGYglnFUGRCROt NGMhZW8rnhPvXFi+QDfZp14sQXUhQJYQqKQi4EWSYUdNnmkSlwhY8ujCQyyUDCbUy6My ufxtoqwWh3Nu9Gd9yRAQM7dP80LyZUnw2C8tBy0AqMP+HBEt6xjQE/pLgItn0zIyXHra YSri9i2i1vPfI0/IhqlmIy5C+ptQLeB39eDr1uboJOc3Kn+WlbD9qm06w50Hpmz2K7+v hT9A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=YuLVCJHbpkQQohbp65txGWMn9Q/dQybnqn2hTPLhq9g=; b=f3oZJaidivVXp1m69VdVkmI6ZhN2lagQYqJBCdrnftBPTy1GHzX158LbNoVPSvlw/+ iensYKVj53eLyXqwA7ydpwVhDPKmX1AsARUjYr/qiRgrKtox06xjNldTXTHPSh6Yxfkt cZJWHR/OkTJD+iCu409ckFuvvhzgglFXCF6mhzrUlYAoa5IFqetbPmMmjyt6QIC4SGo6 zGiz373q651X09+y/yxH/qyygBxzYctC4/qm9lrT4/olVGXMVMmIIMyYVkFbx4T0X9P5 Bj3FNrwA/KDIcnsFqR5slPagORiXFdxIL5lNVW59MFc2FZwA4OUgSb5d+3v11frjG8yL Q16Q== X-Gm-Message-State: AA6/9Rk7SJx5m1C4WOe4bp2CSgaAjOPBSnFD7V2Jt92NYQbvzk2WnKgOHJ3IVqa9OpfZ3ihjxLZKlyFxv3CVww== X-Received: by 10.25.198.9 with SMTP id w9mr4235282lff.164.1476455808210; Fri, 14 Oct 2016 07:36:48 -0700 (PDT) MIME-Version: 1.0 Received: by 10.25.198.21 with HTTP; Fri, 14 Oct 2016 07:36:47 -0700 (PDT) In-Reply-To: <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> From: David Scott Date: Fri, 14 Oct 2016 15:36:47 +0100 Message-ID: To: Anil Madhavapeddy Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1980545602544704502==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============1980545602544704502== Content-Type: multipart/alternative; boundary=94eb2c1a0a0af99b99053ed427f9 --94eb2c1a0a0af99b99053ed427f9 Content-Type: text/plain; charset=UTF-8 On Fri, Oct 14, 2016 at 3:23 PM, Anil Madhavapeddy wrote: > On 14 Oct 2016, at 15:11, Hannes Mehnert wrote: > > > > On 14/10/2016 15:08, Anil Madhavapeddy wrote: > >> Yeah, once we agree on the conventions :-) Once we have everything > using Result.t, we also need to find the right set of combinators. > >> > >> - There is Rresult for basic Result.t handling: > http://erratique.ch/software/rresult/doc/Rresult.html > >> - Lwt_result has a slightly different set of combinators > https://github.com/ocsigen/lwt/blob/master/src/core/lwt_result.mli > >> > >> So I guess we need to decide if we publish an Rresult_lwt.t which lifts > up "('a,'b) result" into an Lwt.t with the same API as Rresult otherwise. > > > > Based on earlier discussion from January 2015, I put some combinators in > > mirage-types.lwt (maybe they should live elsewhere) > > https://github.com/hannesm/mirage/blob/network-error/ > types/runtime.lwt/m_infix.mli > > Ah, missed those, thanks! > They do look useful :) > > Looks like we have a number of different conventions for the binds. Do we > want to have the same set of operators with and without Lwt support (and > open the Infix module locally as needed) or separate operators that be used > alongside each other? > I'm curious what people recommend here -- I'm certainly open to adopting a common convention even if it involves a bit of churn. Initially I kept minting my own infix operators (like `>>*=` `>>|=`) but it quickly got confusing for me and I probably didn't name them uniformly across projects. Recently I've stuck to `>>=` and have put different ones in different modules like this: ``` module LwtResult = struct let (>>=) m f = end ``` and now my code looks like (sometimes with extra newlines, but I don't have strong opinions about that) ``` let open Lwt.Infix in f () >>= fun () -> let open LwtResult in g () >>= fun () -> Lwt.return (Result.Ok ()) (* possibly should define `return` in the module too *) ``` Part of my rationale for using the same bind was a hope that one day modular implicits might automatically choose the right version and I could lose the `let open` but maybe this isn't possible? Cheers, Dave --94eb2c1a0a0af99b99053ed427f9 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Fri, Oct 14, 2016 at 3:23 PM, Anil Madhavapeddy &l= t;anil@recoil.org&= gt; wrote:
On 14 = Oct 2016, at 15:11, Hannes Mehnert <hannes@mehnert.org> wrote:
>
> On 14/10/2016 15:08, Anil Madhavapeddy wrote:
>> Yeah, once we agree on the conventions :-)= =C2=A0 Once we have everything using Result.t, we also need to find the rig= ht set of combinators.
>>
>> - There is Rresult for basic Result.t handling: http://erratique.ch/software/rresult/doc/Rresult.html<= br> >> - Lwt_result has a slightly different set of combinators https://github.com/ocsigen/lwt/blob/= master/src/core/lwt_result.mli
>>
>> So I guess we need to decide if we publish an Rresult_lwt.t which = lifts up "('a,'b) result" into an Lwt.t with the same API= as Rresult otherwise.
>
> Based on earlier discussion from January 2015, I put some combinators = in
> mirage-types.lwt (maybe they should live elsewhere)
> https://githu= b.com/hannesm/mirage/blob/network-error/types/runtime.lwt/m_infix= .mli

Ah, missed those, thanks!

They d= o look useful :)
=C2=A0

Looks like we have a number of different conventions for the binds.=C2=A0 D= o we want to have the same set of operators with and without Lwt support (a= nd open the Infix module locally as needed) or separate operators that be u= sed alongside each other?

I'm curio= us what people recommend here -- I'm certainly open to adopting a commo= n convention even if it involves a bit of churn.

I= nitially I kept minting my own infix operators (like `>>*=3D` `>&g= t;|=3D`) but it quickly got confusing for me and I probably didn't name= them uniformly across projects. Recently I've stuck to `>>=3D` a= nd have put different ones in different modules like this:

```
module LwtResult =3D struct
=C2=A0 let (&g= t;>=3D) m f =3D
end
```

and= now my code looks like (sometimes with extra newlines, but I don't hav= e strong opinions about that)
```
let open Lwt.Infix in=
f () >>=3D fun () ->
let open LwtResult in
g () >>=3D fun () ->
Lwt.return (Result.Ok ()) (= * possibly should define `return` in the module too *)
```
<= div>Part of my rationale for using the same bind was a hope that one day mo= dular implicits might automatically choose the right version and I could lo= se the `let open` but maybe this isn't possible?

Cheers,
Dave
--94eb2c1a0a0af99b99053ed427f9-- --===============1980545602544704502== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============1980545602544704502==-- From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 14:38:13 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 14:38:13 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bv3ci-00074R-O3; Fri, 14 Oct 2016 14:38:12 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bv3ci-00074L-6Z for mirageos-devel@lists.xenproject.org; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 49460 invoked from network); 14 Oct 2016 14:38:10 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-15.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 14 Oct 2016 14:38:10 -0000 Received: from bark.recoil.org (localhost [127.0.0.1]) by bark.recoil.org (OpenSMTPD) with ESMTP id 223f55be; Fri, 14 Oct 2016 15:38:10 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= selector1; bh=S3hwOL8Gc31g943kOrxH7sNQAqg=; b=PtzZPNss7oHTQn2sk9 ty+wG4rWc/mDS9TgFFHC9rFpm+2OG2whTFx0Z2wkjx1T966LHM2/9BfW/a+YWVvS Q/yVXFYMEvaDIRHu3pB8PLr5klG9kd+BwfnKUiwGSxWJFiXICzYyqt+eSTUU57UG hp6EpJ/BTvvZR3sRTD7WSWjsY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= selector1; b=CEeURrdV8r4ntKlp3GoOzTgpfMwNWH1GN3XdWybfNMRbgnY9vJD 77IK1Ju/a6HlJU1RLTMUWbrXSL1nhVk8nnSPu84s02ypT2kHuvoTJ9M48ELY093i GaOi0IzoQpGvzlqM5EjEIgTt9eGhViTYvvKog6bGr12tSbTJs42OjA1M= Received: from [172.16.10.190] (mail.astons-coaches.co.uk [194.72.166.2]) by bark.recoil.org (OpenSMTPD) with ESMTPSA id da29b1dc (TLSv1:ECDHE-RSA-AES256-SHA:256:NO); Fri, 14 Oct 2016 15:38:10 +0100 (BST) Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Anil Madhavapeddy In-Reply-To: <46bc4484-d960-a7db-1fb4-29d1fed076b6@mehnert.org> Date: Fri, 14 Oct 2016 15:38:09 +0100 Message-Id: <6CF930F3-6C8F-47CF-B498-BC6276087063@recoil.org> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <46bc4484-d960-a7db-1fb4-29d1fed076b6@mehnert.org> To: Hannes Mehnert X-Mailer: Apple Mail (2.3124) Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 49883 invoked from network); 14 Oct 2016 14:44:21 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-15.tower-31.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 14 Oct 2016 14:44:21 -0000 Received: from bark.recoil.org (localhost [127.0.0.1]) by bark.recoil.org (OpenSMTPD) with ESMTP id fd4ac319; Fri, 14 Oct 2016 15:44:19 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= selector1; bh=L8bGHxZzg5IY7vrWS7FqGXfyfSk=; b=FW0hzhNuM6BEh6CcMO XIv/GZjxM4etOs0fbdBkxA31Uwv+jJIzLoVdVSf7N5i/CxvZIRRMc9wKO8/4+5VC iGtqTeClojOuu/h2dk21axRheWgYpCwwZe/IvUVfStawjLOMx8qiwMWGGz0wNP7h NmzlNYK73XzLDWywkiwff6UYM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 49883 invoked from network); 14 Oct 2016 14:44:21 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-15.tower-31.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 14 Oct 2016 14:44:21 -0000 Received: from bark.recoil.org (localhost [127.0.0.1]) by bark.recoil.org (OpenSMTPD) with ESMTP id fd4ac319; Fri, 14 Oct 2016 15:44:19 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= selector1; bh=L8bGHxZzg5IY7vrWS7FqGXfyfSk=; b=FW0hzhNuM6BEh6CcMO XIv/GZjxM4etOs0fbdBkxA31Uwv+jJIzLoVdVSf7N5i/CxvZIRRMc9wKO8/4+5VC iGtqTeClojOuu/h2dk21axRheWgYpCwwZe/IvUVfStawjLOMx8qiwMWGGz0wNP7h NmzlNYK73XzLDWywkiwff6UYM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= selector1; b=L8FLBGWRVrf3C1tFeATLIM7OdC2QA5yTVKzoUCruqknVMKcWAuz TJir94MI2y/6YfKSOLOOpUCFkOqsePaj3XALDipaQ1R+Hs61muZLMIbOQSmgNJe7 e8mK2uSK/rSHhF94uKEAc9zodwEelQbGlz6TeQMeTbD73dHJ72w3agy0= Received: from [172.16.10.190] (mail.astons-coaches.co.uk [194.72.166.2]) by bark.recoil.org (OpenSMTPD) with ESMTPSA id aaa32286 (TLSv1:ECDHE-RSA-AES256-SHA:256:NO); Fri, 14 Oct 2016 15:44:19 +0100 (BST) Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Anil Madhavapeddy In-Reply-To: Date: Fri, 14 Oct 2016 15:44:18 +0100 Message-Id: <119692B6-0EAF-47CF-BA06-78DDED0EAC93@recoil.org> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> To: David Scott X-Mailer: Apple Mail (2.3124) Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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[209.85.213.180]) by smtp.gmail.com with ESMTPSA id b11sm6474418ywe.19.2016.10.14.07.50.09 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 14 Oct 2016 07:50:09 -0700 (PDT) Received: by mail-yb0-f180.google.com with SMTP id 184so43411443yby.2 for ; Fri, 14 Oct 2016 07:50:09 -0700 (PDT) X-Received: by 10.37.117.87 with SMTP id q84mr4033060ybc.80.1476456609275; Fri, 14 Oct 2016 07:50:09 -0700 (PDT) MIME-Version: 1.0 Received: by 10.129.161.16 with HTTP; Fri, 14 Oct 2016 07:50:08 -0700 (PDT) In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> From: Richard Mortier Date: Fri, 14 Oct 2016 15:50:08 +0100 X-Gmail-Original-Message-ID: Message-ID: To: David Scott Cc: "mirageos-devel@lists.xenproject.org" , Anil Madhavapeddy Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 42758 invoked from network); 14 Oct 2016 15:33:59 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-7.tower-31.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 14 Oct 2016 15:33:59 -0000 Received: from [128.232.110.111] (c111.al.cl.cam.ac.uk [128.232.110.111]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id C6091258D for ; Fri, 14 Oct 2016 17:33:58 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <119692B6-0EAF-47CF-BA06-78DDED0EAC93@recoil.org> From: Hannes Mehnert Message-ID: <793ff328-e413-b5b5-a9e4-fb9bb1bdc576@mehnert.org> Date: Fri, 14 Oct 2016 16:33:33 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <119692B6-0EAF-47CF-BA06-78DDED0EAC93@recoil.org> Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTQvMTAvMjAxNiAxNTo0NCwgQW5pbCBNYWRoYXZhcGVkZHkgd3JvdGU6Cj4gT24gMTQgT2N0 IDIwMTYsIGF0IDE1OjM2LCBEYXZpZCBTY290dCA8c2NvdHQuZGpAZ21haWwuY29tPiB3cm90ZToK Pj4KPj4gTG9va3MgbGlrZSB3ZSBoYXZlIGEgbnVtYmVyIG9mIGRpZmZlcmVudCBjb252ZW50aW9u cyBmb3IgdGhlIGJpbmRzLiAgRG8gd2Ugd2FudCB0byBoYXZlIHRoZSBzYW1lIHNldCBvZiBvcGVy YXRvcnMgd2l0aCBhbmQgd2l0aG91dCBMd3Qgc3VwcG9ydCAoYW5kIG9wZW4gdGhlIEluZml4IG1v ZHVsZSBsb2NhbGx5IGFzIG5lZWRlZCkgb3Igc2VwYXJhdGUgb3BlcmF0b3JzIHRoYXQgYmUgdXNl ZCBhbG9uZ3NpZGUgZWFjaCBvdGhlcj8KPj4KPj4gSSdtIGN1cmlvdXMgd2hhdCBwZW9wbGUgcmVj b21tZW5kIGhlcmUgLS0gSSdtIGNlcnRhaW5seSBvcGVuIHRvIGFkb3B0aW5nIGEgY29tbW9uIGNv bnZlbnRpb24gZXZlbiBpZiBpdCBpbnZvbHZlcyBhIGJpdCBvZiBjaHVybi4KPj4KPj4gSW5pdGlh bGx5IEkga2VwdCBtaW50aW5nIG15IG93biBpbmZpeCBvcGVyYXRvcnMgKGxpa2UgYD4+Kj1gIGA+ Pnw9YCkgYnV0IGl0IHF1aWNrbHkgZ290IGNvbmZ1c2luZyBmb3IgbWUgYW5kIEkgcHJvYmFibHkg ZGlkbid0IG5hbWUgdGhlbSB1bmlmb3JtbHkgYWNyb3NzIHByb2plY3RzLiBSZWNlbnRseSBJJ3Zl IHN0dWNrIHRvIGA+Pj1gIGFuZCBoYXZlIHB1dCBkaWZmZXJlbnQgb25lcyBpbiBkaWZmZXJlbnQg bW9kdWxlcyBsaWtlIHRoaXM6Cj4+Cj4+IGBgYAo+PiBtb2R1bGUgTHd0UmVzdWx0ID0gc3RydWN0 Cj4+ICAgbGV0ICg+Pj0pIG0gZiA9Cj4+IGVuZAo+PiBgYGAKPj4KPj4gYW5kIG5vdyBteSBjb2Rl IGxvb2tzIGxpa2UgKHNvbWV0aW1lcyB3aXRoIGV4dHJhIG5ld2xpbmVzLCBidXQgSSBkb24ndCBo YXZlIHN0cm9uZyBvcGluaW9ucyBhYm91dCB0aGF0KQo+PiBgYGAKPj4gbGV0IG9wZW4gTHd0Lklu Zml4IGluCj4+IGYgKCkgPj49IGZ1biAoKSAtPgo+PiBsZXQgb3BlbiBMd3RSZXN1bHQgaW4KPj4g ZyAoKSA+Pj0gZnVuICgpIC0+Cj4+IEx3dC5yZXR1cm4gKFJlc3VsdC5PayAoKSkgKCogcG9zc2li bHkgc2hvdWxkIGRlZmluZSBgcmV0dXJuYCBpbiB0aGUgbW9kdWxlIHRvbyAqKQo+PiBgYGAKPj4g UGFydCBvZiBteSByYXRpb25hbGUgZm9yIHVzaW5nIHRoZSBzYW1lIGJpbmQgd2FzIGEgaG9wZSB0 aGF0IG9uZSBkYXkgbW9kdWxhciBpbXBsaWNpdHMgbWlnaHQgYXV0b21hdGljYWxseSBjaG9vc2Ug dGhlIHJpZ2h0IHZlcnNpb24gYW5kIEkgY291bGQgbG9zZSB0aGUgYGxldCBvcGVuYCBidXQgbWF5 YmUgdGhpcyBpc24ndCBwb3NzaWJsZT8KCkknZCBmaW5kIHRoZSBjb2RlIHdpdGhvdXQgdGhlIGBs ZXQgb3BlbiBfXyBpbmAgZXZlbiBtb3JlIGNvbmZ1c2luZyAoYW5kCnNvbWV0aW1lcyB5b3VyIGBs ZXQgb3BlbiBfXyBpbmAgaXMgYWxyZWFkeSBtYW55IGxpbmVzIGF3YXkgZnJvbSBpdHMgdXNhZ2Up LgoKPiBHb29kIHBvaW50LiBUbyBnbyBvdmVyIHRvIHRoZSAib3ZlcmxvYWQgdGhlIG9wZXJhdG9y cyIgY2FtcCBkZXNwaXRlIG15IHByZXZpb3VzIG1haWwsIEkgZGlkIHJlbWVtYmVyIHRoYXQgcHB4 X2xldCBzdXBwb3J0cyBhcmJpdHJhcnkgbW9uYWRpYyBhbmQgYXBwbGljYXRpdmUgc3ludGF4OgoK QXMgc2FpZCBpbiBteSBlYXJsaWVyIG1haWwsIEkgZmluZCBsb2NhbCBgbGV0IG9wZW4gX18gaW5g IHJhdGhlciBoYXJkIHRvCmZvbGxvdy4KCkluIHRoZSBlbmQsIGhvdyBtYW55IGRpZmZlcmVudCBi aW5kcyBkbyB3ZSBuZWVkPyAgSSdkIHRoaW5rIHR3byBvcgp0aHJlZSwgdGhlIEx3dCBvbmUgKGZv ciBlZmZlY3RmdWwgbm9uLWVycm9yLXJhaXNpbmcgY29kZSksIHRoZSBycmVzdWx0Cm9uZSAoZm9y IHB1cmUgY29kZSksIGFuZCB0aGUgY29tYmluZWQgb25lID4+PT8gOiAoYSwgYikgcmVzdWx0IEx3 dC50IC0+CihhIC0+IChjLCBiKSByZXN1bHQgTHd0LnQpIC0+IChjLCBiKSByZXN1bHQgTHd0LnQK CkFuZCB0aGVyZSB3aWxsIGxpa2VseSBiZSBjb21iaW5hdGlvbnMgb2YgPj49IGFuZCA+Pj0/Cgpo YW5uZXMKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCk1p cmFnZU9TLWRldmVsIG1haWxpbmcgbGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0 Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1hbi9saXN0aW5m by9taXJhZ2Vvcy1kZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 15:34:07 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 15:34:07 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bv4Uk-0002aM-95; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 42758 invoked from network); 14 Oct 2016 15:33:59 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-7.tower-31.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 14 Oct 2016 15:33:59 -0000 Received: from [128.232.110.111] (c111.al.cl.cam.ac.uk [128.232.110.111]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id C6091258D for ; Fri, 14 Oct 2016 17:33:58 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <119692B6-0EAF-47CF-BA06-78DDED0EAC93@recoil.org> From: Hannes Mehnert Message-ID: <793ff328-e413-b5b5-a9e4-fb9bb1bdc576@mehnert.org> Date: Fri, 14 Oct 2016 16:33:33 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <119692B6-0EAF-47CF-BA06-78DDED0EAC93@recoil.org> Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTQvMTAvMjAxNiAxNTo0NCwgQW5pbCBNYWRoYXZhcGVkZHkgd3JvdGU6Cj4gT24gMTQgT2N0 IDIwMTYsIGF0IDE1OjM2LCBEYXZpZCBTY290dCA8c2NvdHQuZGpAZ21haWwuY29tPiB3cm90ZToK Pj4KPj4gTG9va3MgbGlrZSB3ZSBoYXZlIGEgbnVtYmVyIG9mIGRpZmZlcmVudCBjb252ZW50aW9u cyBmb3IgdGhlIGJpbmRzLiAgRG8gd2Ugd2FudCB0byBoYXZlIHRoZSBzYW1lIHNldCBvZiBvcGVy YXRvcnMgd2l0aCBhbmQgd2l0aG91dCBMd3Qgc3VwcG9ydCAoYW5kIG9wZW4gdGhlIEluZml4IG1v ZHVsZSBsb2NhbGx5IGFzIG5lZWRlZCkgb3Igc2VwYXJhdGUgb3BlcmF0b3JzIHRoYXQgYmUgdXNl ZCBhbG9uZ3NpZGUgZWFjaCBvdGhlcj8KPj4KPj4gSSdtIGN1cmlvdXMgd2hhdCBwZW9wbGUgcmVj b21tZW5kIGhlcmUgLS0gSSdtIGNlcnRhaW5seSBvcGVuIHRvIGFkb3B0aW5nIGEgY29tbW9uIGNv bnZlbnRpb24gZXZlbiBpZiBpdCBpbnZvbHZlcyBhIGJpdCBvZiBjaHVybi4KPj4KPj4gSW5pdGlh bGx5IEkga2VwdCBtaW50aW5nIG15IG93biBpbmZpeCBvcGVyYXRvcnMgKGxpa2UgYD4+Kj1gIGA+ Pnw9YCkgYnV0IGl0IHF1aWNrbHkgZ290IGNvbmZ1c2luZyBmb3IgbWUgYW5kIEkgcHJvYmFibHkg ZGlkbid0IG5hbWUgdGhlbSB1bmlmb3JtbHkgYWNyb3NzIHByb2plY3RzLiBSZWNlbnRseSBJJ3Zl IHN0dWNrIHRvIGA+Pj1gIGFuZCBoYXZlIHB1dCBkaWZmZXJlbnQgb25lcyBpbiBkaWZmZXJlbnQg bW9kdWxlcyBsaWtlIHRoaXM6Cj4+Cj4+IGBgYAo+PiBtb2R1bGUgTHd0UmVzdWx0ID0gc3RydWN0 Cj4+ICAgbGV0ICg+Pj0pIG0gZiA9Cj4+IGVuZAo+PiBgYGAKPj4KPj4gYW5kIG5vdyBteSBjb2Rl IGxvb2tzIGxpa2UgKHNvbWV0aW1lcyB3aXRoIGV4dHJhIG5ld2xpbmVzLCBidXQgSSBkb24ndCBo YXZlIHN0cm9uZyBvcGluaW9ucyBhYm91dCB0aGF0KQo+PiBgYGAKPj4gbGV0IG9wZW4gTHd0Lklu Zml4IGluCj4+IGYgKCkgPj49IGZ1biAoKSAtPgo+PiBsZXQgb3BlbiBMd3RSZXN1bHQgaW4KPj4g ZyAoKSA+Pj0gZnVuICgpIC0+Cj4+IEx3dC5yZXR1cm4gKFJlc3VsdC5PayAoKSkgKCogcG9zc2li bHkgc2hvdWxkIGRlZmluZSBgcmV0dXJuYCBpbiB0aGUgbW9kdWxlIHRvbyAqKQo+PiBgYGAKPj4g UGFydCBvZiBteSByYXRpb25hbGUgZm9yIHVzaW5nIHRoZSBzYW1lIGJpbmQgd2FzIGEgaG9wZSB0 aGF0IG9uZSBkYXkgbW9kdWxhciBpbXBsaWNpdHMgbWlnaHQgYXV0b21hdGljYWxseSBjaG9vc2Ug dGhlIHJpZ2h0IHZlcnNpb24gYW5kIEkgY291bGQgbG9zZSB0aGUgYGxldCBvcGVuYCBidXQgbWF5 YmUgdGhpcyBpc24ndCBwb3NzaWJsZT8KCkknZCBmaW5kIHRoZSBjb2RlIHdpdGhvdXQgdGhlIGBs ZXQgb3BlbiBfXyBpbmAgZXZlbiBtb3JlIGNvbmZ1c2luZyAoYW5kCnNvbWV0aW1lcyB5b3VyIGBs ZXQgb3BlbiBfXyBpbmAgaXMgYWxyZWFkeSBtYW55IGxpbmVzIGF3YXkgZnJvbSBpdHMgdXNhZ2Up LgoKPiBHb29kIHBvaW50LiBUbyBnbyBvdmVyIHRvIHRoZSAib3ZlcmxvYWQgdGhlIG9wZXJhdG9y cyIgY2FtcCBkZXNwaXRlIG15IHByZXZpb3VzIG1haWwsIEkgZGlkIHJlbWVtYmVyIHRoYXQgcHB4 X2xldCBzdXBwb3J0cyBhcmJpdHJhcnkgbW9uYWRpYyBhbmQgYXBwbGljYXRpdmUgc3ludGF4OgoK QXMgc2FpZCBpbiBteSBlYXJsaWVyIG1haWwsIEkgZmluZCBsb2NhbCBgbGV0IG9wZW4gX18gaW5g IHJhdGhlciBoYXJkIHRvCmZvbGxvdy4KCkluIHRoZSBlbmQsIGhvdyBtYW55IGRpZmZlcmVudCBi aW5kcyBkbyB3ZSBuZWVkPyAgSSdkIHRoaW5rIHR3byBvcgp0aHJlZSwgdGhlIEx3dCBvbmUgKGZv ciBlZmZlY3RmdWwgbm9uLWVycm9yLXJhaXNpbmcgY29kZSksIHRoZSBycmVzdWx0Cm9uZSAoZm9y IHB1cmUgY29kZSksIGFuZCB0aGUgY29tYmluZWQgb25lID4+PT8gOiAoYSwgYikgcmVzdWx0IEx3 dC50IC0+CihhIC0+IChjLCBiKSByZXN1bHQgTHd0LnQpIC0+IChjLCBiKSByZXN1bHQgTHd0LnQK CkFuZCB0aGVyZSB3aWxsIGxpa2VseSBiZSBjb21iaW5hdGlvbnMgb2YgPj49IGFuZCA+Pj0/Cgpo YW5uZXMKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCk1p cmFnZU9TLWRldmVsIG1haWxpbmcgbGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0 Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1hbi9saXN0aW5m by9taXJhZ2Vvcy1kZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Fri Oct 14 16:03:43 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 14 Oct 2016 16:03:43 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bv4xR-0005KX-3E; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 19927 invoked from network); 14 Oct 2016 16:03:37 -0000 Received: from mail-qk0-f196.google.com (HELO mail-qk0-f196.google.com) (209.85.220.196) by server-10.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 14 Oct 2016 16:03:37 -0000 Received: by mail-qk0-f196.google.com with SMTP id n189so8937599qke.1 for ; Fri, 14 Oct 2016 09:03:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=Mh0sGj6Bkw/e6CnfSQuhCBsueLVoAlwRMWq8E0anJec=; b=WoJfuj6qOBTizui9FjR+zVqmOcqY1wMEYmEWrt2VLXgZ3h9Eq/XebWJJTCOZFpkBmO KwRwTCMmPqOjBbfYefmzzGOlMYtEErRhnMy0hvCQtbHgb7mdIVY09WHKeExj0ypL5Vmy YhRXCPFAQyMu9PlNk1hA8lcQ2PKXme7Rh5l1vnr14uEIihGjZsl9GwIozanbt2Qi64RP kX5AtbJTE4YdIUwPEnknJDJMkUifysgjSULeps5q3I4BrI+4+v6Jtm0Rc0EfFOU4Vtip gJjtKmg2w3HtTPqIIbNsa1gqtij2cjCDiKNamzl4osPShaTEXyf4ZiJ6CiyyraNwWHuX WeHA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=Mh0sGj6Bkw/e6CnfSQuhCBsueLVoAlwRMWq8E0anJec=; b=J6oSpUQ9RjcDo5KN7O5pLySO4DbHn2kZekkuPYeVkkWPO+ZBBC9YflzZqCOQvoUkpA whZv7iC0Z7JJv5HRC7NWaBBP+8/g5TF9UbLEbSIkshtAXaF7ARE0RLJI8/RkVpkyWl/K oFMbDZ9qtyy69W+oW7p4MccS+Ka8CzlqzQIK2MobCcp5RcKTXTiP1vPRQ8sq6yoOVf2L o3ddbwy2EK0o+LR1Tl1vw0ar678+VrvL414NwMCbe6d6TaP3MdFdCHnV1864TKNVgPtK oBfeajQQZZV+bXGzfFxwUQFjkWn3p4ZElmI04RQ1OC0SVQ/AfFVyombLlTIuA8MWyviK yukg== X-Gm-Message-State: AA6/9RnZ/uhefI4rkdVnL9amEf74ySyR72GZcl7mRgbJD5H/cUdHrsXTdmgCfrxHwfLbw+DL4z09G59XGEerDg== X-Received: by 10.55.174.2 with SMTP id x2mr14419452qke.63.1476461016221; Fri, 14 Oct 2016 09:03:36 -0700 (PDT) MIME-Version: 1.0 Received: by 10.55.185.7 with HTTP; Fri, 14 Oct 2016 09:03:15 -0700 (PDT) In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> From: Ashish Agarwal Date: Fri, 14 Oct 2016 12:03:15 -0400 Message-ID: To: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============8973576885183121096==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============8973576885183121096== Content-Type: multipart/alternative; boundary=94eb2c0724066590dc053ed55eb5 --94eb2c0724066590dc053ed55eb5 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Using polymorphic variants for the error type poses some challenges. Here are some things to think about. (The following code assumes `open Async.Std` because it already has the necessary combinators). Error Unification # let x =3D return (Error `Bad);; val x : ('a, [> `Bad ]) Result.t Deferred.t =3D # let f ok =3D if ok then return (Ok "all good") else return (Error `Error)= ;; val f : bool -> (string, [> `Error ]) Result.t Deferred.t =3D # x >>=3D? f;; - : (string, [> `Bad | `Error ]) Result.t =3D Core_kernel.Std.Result.Error `Bad So that works nicely. Two different error types get unified. Notice the inferred types of x and f are open. Forcing a closed type breaks things: # let x : (bool, [`Bad]) Result.t Deferred.t =3D return (Error `Bad);; val x : (bool, [ `Bad ]) Result.t Deferred.t =3D # x >>=3D? f;; Error: This expression has type bool -> (string, [> `Error ] as 'a) Result.t Deferred.t but an expression was expected of type bool -> (string, [ `Bad ]) Deferred.Result.t Type (string, 'a) Result.t Deferred.t is not compatible with type (string, [ `Bad ]) Deferred.Result.t =3D (string, [ `Bad ]) Result.t Deferred.t The second variant type does not allow tag(s) `Error So is the annotation on x wrong? Well, it type checks, so it's not disallowed. But is it just bad style? Is there never a reason to force a closed type? Could adding functions like Bunzli's open_error_msg resolve the matter easily enough? Unification At Scale In large code bases, you can't get around the problem because you'll surely introduce incompatible types. # let x =3D return (Error (`Bad "uh oh"));; val x : ('a, [> `Bad of string ]) Result.t Deferred.t =3D # let f ok =3D if ok then return (Ok "all good") else return (Error (`Bad 42));; val f : bool -> (string, [> `Bad of int ]) Result.t Deferred.t =3D # x >>=3D? f;; Error: This expression has type bool -> (string, [> `Bad of int ] as 'a) Result.t Deferred.t but an expression was expected of type bool -> (string, [> `Bad of string ] as 'b) Deferred.Result.t Type (string, 'a) Result.t Deferred.t is not compatible with type (string, 'b) Deferred.Result.t =3D (string, 'b) Result.t Deferred.= t Types for tag `Bad are incompatible Now you have to manually handle the errors every time x and f are used in the same context. Should some support for that be standardized? We started defining functions like val bind_and_handle_error : ('a, 'e1) Result.t Deferred.t -> ('a -> ('b, 'e2) Result.t Deferred.t -> merge_error:('e1 -> 'e2 -> 'e3) -> ('a, 'e3) Result.t Deferred.t It's 3 arguments, so no more infix operator. If you end up with bind_and_handle_error everywhere instead of (>>=3D?), you soon get annoyed. Writing MLI Files The goal is to maintain precise error information, so you diligently define unique variants for all your functions. Now you've got all kinds of polymorphic variant types, getting unified, and growing into larger and larger types. Every function's signature is thus something like (int, [`Err1 of int | `Err2 of string | .... | `Err20 of unit] Result.t Type inference gives you this error the first time, but now you copy/paste into your mli. When some upstream code changes, your module no longer compiles because the error type changed. So you have to keep copying/pasting the updated error type. That gets annoying very fast. An idea to avoid that is to name your error types: module A : sig type err1 =3D [`Err1 of string] val f : int -> (string, err1) Result.t Deferred.t end module B : sig type err2 =3D [`Err2 of int] val g : unit -> (string, [err1 | err2]) Result.t Deferred.t end Now, even if you change type err1, the signature for module B remains valid. However, you've introduced a different annoyance; you have to name all your error types. Also, you've only avoided one case. If g's implementation is modified to start using yet another function, then you do have to change g's signature. Note this is very different from the usual case. Normally, calling out to additional code in a function's implementation doesn't change that function's return type. Now you're in a situation where return types change all the time. Worse, if g's implementation stops using f, the signature of g should be changed but the compiler won't tell you that. Quickly you'll have functions that say they can return error `Foo but actually they cannot. Coding Expertise Historically beginners have been advised to avoid polymorphic variants. Although this seems to be less true now on, it is certainly the case that coding with them is a bit harder. Example: With this style, you end up wanting to define a function like: val with_file : string -> f : (t -> (=E2=80=98a, =E2=80=98b) Result.t -> (=E2=80=98a, [> err | =E2=80=98b]) Result.t The idea is that opening the file might return an error err. If the file is opened successfully, you call f, and f might return error `b. Thus, the result type should have errors [err | `b]. However, the above doesn't type check. The signature actually has to be (thanks to Sebastien Mondet for teaching me this years ago): val with_file : string -> f : (t -> (=E2=80=98a, [> err] as =E2=80=98b) Result.t -> (=E2=80=98a, =E2=80=98b) Result.t Do you want your user and developer base to deal with such signatures? It is unclear what this signature is saying. We now have err mentioned in the return type of f, but in our original intention err has nothing to do with f. Of course, there is an explanation that makes sense of it (but I'll skip it). I seem to be arguing strongly against the use of polymorphic variants, but I'm not. I'm really unsure what the right answer is. A lot of the problems I'm mentioning would go away if there was a project wide standardization of the particular polymorphic variants used. The value of using them is high, so actually I hope they will be used. On Fri, Oct 14, 2016 at 10:50 AM, Richard Mortier < richard.mortier@cl.cam.ac.uk> wrote: > On 14 October 2016 at 15:36, David Scott wrote: > >> Looks like we have a number of different conventions for the binds. D= o > we > >> want to have the same set of operators with and without Lwt support (a= nd > >> open the Infix module locally as needed) or separate operators that be > used > >> alongside each other? > > > > I'm curious what people recommend here -- I'm certainly open to adoptin= g > a > > common convention even if it involves a bit of churn. > > Purely personal anecdotal opinion: > FWIW the only addition to the standard Lwt use of `>>=3D` that I've > found intuitive / memorable enough (somehow) is `>>=3D?` for an operator > that handles Result types as described too. > > (TBH I have a hard time even keeping the meanings of `>>|=3D` / `>>|?` > in my head.) > > -- > Richard Mortier > richard.mortier@cl.cam.ac.uk > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > --94eb2c0724066590dc053ed55eb5 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Using polymorphic variants for the error type poses some c= hallenges. Here are some things to think about. (The following code assumes= `open Async.Std` because it already has the necessary combinators).
Error Unification

# let x =3D re= turn (Error `Bad);;
val x : ('a, [> `Bad ]) Result.t Defer= red.t =3D <abstr>

# let f ok= =3D if ok then return (Ok "all good") else return (Error `Error)= ;;
val f : bool -> (string, [> `Error ]) Result.t Deferred.= t =3D <fun>

# x >>=3D= ? f;;
- : (string, [> `Bad | `Error ]) Result.t =3D Core_kerne= l.Std.Result.Error `Bad

So that works nicely= . Two different error types get unified. Notice the inferred types of x and= f are open. Forcing a closed type breaks things:

=
# let x : (bool, [`Bad]) Result.t Deferred.t =3D return (Error `Bad);;=
val x : (bool, [ `Bad ]) Result.t Deferred.t =3D <abstr>

# x >>=3D? f;;
Error: Th= is expression has type =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0bool ->= ; (string, [> `Error ] as 'a) Result.t Deferred.t =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 but an expression was expe= cted of type =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0
=C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0bool -> (string, [ `Bad ]) Deferred.Result.t
<= div>=C2=A0 =C2=A0 =C2=A0 =C2=A0Type (string, 'a) Result.t Deferred.t is= not compatible with type
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(stri= ng, [ `Bad ]) Deferred.Result.t =3D
=C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0(string, [ `Bad ]) Result.t Deferred.t=C2=A0
=C2=A0 = =C2=A0 =C2=A0 =C2=A0The second variant type does not allow tag(s) `Error

So is the annotation on x wrong? Well, it type= checks, so it's not disallowed. But is it just bad style? Is there nev= er a reason to force a closed type? Could adding functions like Bunzli'= s open_error_msg resolve the matter easily enough?

Unification At Scale

In large code bases, you can= 't get around the problem because you'll surely introduce incompati= ble types.

# let x =3D return (Error (`Bad &q= uot;uh oh"));;
val x : ('a, [> `Bad of string ]) Resu= lt.t Deferred.t =3D <abstr>

# let= f ok =3D if ok then return (Ok "all good") else return (Error (`= Bad 42));;
val f : bool -> (string, [> `Bad of int ]) Resul= t.t Deferred.t =3D <fun>

# x >= >=3D? f;;
Error: This expression has type =C2=A0 =C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0bool -> (string, [> `Bad of int ] as 'a) = Result.t Deferred.t =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0but an= expression was expected of type =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0bool -> (string, [> `Bad of= string ] as 'b) Deferred.Result.t
=C2=A0 =C2=A0 =C2=A0 =C2= =A0Type (string, 'a) Result.t Deferred.t is not compatible with type
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(string, 'b) Deferred.Result.= t =3D (string, 'b) Result.t Deferred.t=C2=A0
=C2=A0 =C2=A0 = =C2=A0 =C2=A0Types for tag `Bad are incompatible

=
Now you have to manually handle the errors every time x and f are used= in the same context. Should some support for that be standardized? We star= ted defining functions like

val bind_and_handle_er= ror
=C2=A0 : =C2=A0('a, 'e1) Result.t Deferred.t
=C2=A0 -> ('a -> ('b, 'e2) Result.t Deferred.t
=C2=A0 -> merge_error:('e1 -> 'e2 -> 'e3)
= =C2=A0 -> ('a, 'e3) Result.t Deferred.t

It's 3 arguments, so no more infix operator. If you end up with bind_a= nd_handle_error everywhere instead of (>>=3D?), you soon get annoyed.=


Writing MLI Files

The goal is to maintain precise error information, so you diligent= ly define unique variants for all your functions.=C2=A0Now you've got a= ll kinds of polymorphic variant types, getting unified, and growing into la= rger and larger types. Every function's signature is thus something lik= e

(int, [`Err1 of int | `Err2 of string | .... | `= Err20 of unit] Result.t

Type inference gives you t= his error the first time, but now you copy/paste into your mli. When some u= pstream code changes, your module no longer compiles because the error type= changed. So you have to keep copying/pasting the updated error type. That = gets annoying very fast.

An idea to avoid that is = to name your error types:

module A : sig
=C2=A0 type err1 =3D [`Err1 of string]
=C2=A0 val f : int -> = (string, err1) Result.t Deferred.t
end

m= odule B : sig
=C2=A0 type err2 =3D [`Err2 of int]
=C2= =A0 val g : unit -> (string, [err1 | err2]) Result.t Deferred.t
end

Now, even if you change type err1, the signa= ture for module B remains valid. However, you've introduced a different= annoyance; you have to name all your error types. Also, you've only av= oided one case. If g's implementation is modified to start using yet an= other function, then you do have to change g's signature. Note this is = very different from the usual case. Normally, calling out to additional cod= e in a function's implementation doesn't change that function's= return type. Now you're in a situation where return types change all t= he time. Worse, if g's implementation stops using f, the signature of g= should be changed but the compiler won't tell you that. Quickly you= 9;ll have functions that say they can return error `Foo but actually they c= annot.


Coding Expertise
<= br>
Historically beginners have been advised to avoid polymorphic= variants. Although this seems to be less true now on, it is certainly the = case that coding with them is a bit harder. Example:

With this style, you end up wanting to define a function like:

val with_file :
=C2=A0 =C2=A0 =C2=A0string -= >
=C2=A0 =C2=A0 =C2=A0f : (t -> (=E2=80=98a, =E2=80=98b) Re= sult.t ->
=C2=A0 =C2=A0 =C2=A0(=E2=80=98a, [> err | =E2=80= =98b]) Result.t

The idea is that opening the= file might return an error err. If the file is opened successfully, you ca= ll f, and f might return error `b. Thus, the result type should have errors= [err | `b]. However, the above doesn't type check. The signature actua= lly has to be (thanks to Sebastien Mondet for teaching me this years ago):<= /div>

val with_file :
=C2=A0 =C2=A0 =C2= =A0string ->
=C2=A0 =C2=A0 =C2=A0f : (t -> (=E2=80=98a, [&g= t; err] as =E2=80=98b) Result.t ->
=C2=A0 =C2=A0 =C2=A0(=E2=80= =98a, =E2=80=98b) Result.t

Do you want your = user and developer base to deal with such signatures? It is unclear what th= is signature is saying. We now have err mentioned in the return type of f, = but in our original intention err has nothing to do with f. Of course, ther= e is an explanation that makes sense of it (but I'll skip it).

I seem to be arguing strongly against the use of polymorph= ic variants, but I'm not. I'm really unsure what the right answer i= s. A lot of the problems I'm mentioning would go away if there was a pr= oject wide standardization of the particular polymorphic variants used. The= value of using them is high, so actually I hope they will be used.






On Fri, Oct 1= 4, 2016 at 10:50 AM, Richard Mortier <richard.mortier@cl.cam.ac= .uk> wrote:
On 14 October 2016 at 15:36, David Scott <scott.dj@gmail.com> wrote:
>> Looks like we have a number of different conventions for the binds= .=C2=A0 Do we
>> want to have the same set of operators with and without Lwt suppor= t (and
>> open the Infix module locally as needed) or separate operators tha= t be used
>> alongside each other?
>
> I'm curious what people recommend here -- I'm certainly open t= o adopting a
> common convention even if it involves a bit of churn.

Purely personal anecdotal opinion:
FWIW the only addition to the standard Lwt use of `>>=3D` that I'= ve
found intuitive / memorable enough (somehow) is `>>=3D?` for an opera= tor
that handles Result types as described too.

(TBH I have a hard time even keeping the meanings of `>>|=3D` / `>= >|?`
in my head.)

--
Richard Mortier
richard.mortier@cl.cam.ac.u= k

_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@lists= .xenproject.org
https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel

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boundary="===============8973576885183121096==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============8973576885183121096== Content-Type: multipart/alternative; boundary=94eb2c0724066590dc053ed55eb5 --94eb2c0724066590dc053ed55eb5 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Using polymorphic variants for the error type poses some challenges. Here are some things to think about. (The following code assumes `open Async.Std` because it already has the necessary combinators). Error Unification # let x =3D return (Error `Bad);; val x : ('a, [> `Bad ]) Result.t Deferred.t =3D # let f ok =3D if ok then return (Ok "all good") else return (Error `Error)= ;; val f : bool -> (string, [> `Error ]) Result.t Deferred.t =3D # x >>=3D? f;; - : (string, [> `Bad | `Error ]) Result.t =3D Core_kernel.Std.Result.Error `Bad So that works nicely. Two different error types get unified. Notice the inferred types of x and f are open. Forcing a closed type breaks things: # let x : (bool, [`Bad]) Result.t Deferred.t =3D return (Error `Bad);; val x : (bool, [ `Bad ]) Result.t Deferred.t =3D # x >>=3D? f;; Error: This expression has type bool -> (string, [> `Error ] as 'a) Result.t Deferred.t but an expression was expected of type bool -> (string, [ `Bad ]) Deferred.Result.t Type (string, 'a) Result.t Deferred.t is not compatible with type (string, [ `Bad ]) Deferred.Result.t =3D (string, [ `Bad ]) Result.t Deferred.t The second variant type does not allow tag(s) `Error So is the annotation on x wrong? Well, it type checks, so it's not disallowed. But is it just bad style? Is there never a reason to force a closed type? Could adding functions like Bunzli's open_error_msg resolve the matter easily enough? Unification At Scale In large code bases, you can't get around the problem because you'll surely introduce incompatible types. # let x =3D return (Error (`Bad "uh oh"));; val x : ('a, [> `Bad of string ]) Result.t Deferred.t =3D # let f ok =3D if ok then return (Ok "all good") else return (Error (`Bad 42));; val f : bool -> (string, [> `Bad of int ]) Result.t Deferred.t =3D # x >>=3D? f;; Error: This expression has type bool -> (string, [> `Bad of int ] as 'a) Result.t Deferred.t but an expression was expected of type bool -> (string, [> `Bad of string ] as 'b) Deferred.Result.t Type (string, 'a) Result.t Deferred.t is not compatible with type (string, 'b) Deferred.Result.t =3D (string, 'b) Result.t Deferred.= t Types for tag `Bad are incompatible Now you have to manually handle the errors every time x and f are used in the same context. Should some support for that be standardized? We started defining functions like val bind_and_handle_error : ('a, 'e1) Result.t Deferred.t -> ('a -> ('b, 'e2) Result.t Deferred.t -> merge_error:('e1 -> 'e2 -> 'e3) -> ('a, 'e3) Result.t Deferred.t It's 3 arguments, so no more infix operator. If you end up with bind_and_handle_error everywhere instead of (>>=3D?), you soon get annoyed. Writing MLI Files The goal is to maintain precise error information, so you diligently define unique variants for all your functions. Now you've got all kinds of polymorphic variant types, getting unified, and growing into larger and larger types. Every function's signature is thus something like (int, [`Err1 of int | `Err2 of string | .... | `Err20 of unit] Result.t Type inference gives you this error the first time, but now you copy/paste into your mli. When some upstream code changes, your module no longer compiles because the error type changed. So you have to keep copying/pasting the updated error type. That gets annoying very fast. An idea to avoid that is to name your error types: module A : sig type err1 =3D [`Err1 of string] val f : int -> (string, err1) Result.t Deferred.t end module B : sig type err2 =3D [`Err2 of int] val g : unit -> (string, [err1 | err2]) Result.t Deferred.t end Now, even if you change type err1, the signature for module B remains valid. However, you've introduced a different annoyance; you have to name all your error types. Also, you've only avoided one case. If g's implementation is modified to start using yet another function, then you do have to change g's signature. Note this is very different from the usual case. Normally, calling out to additional code in a function's implementation doesn't change that function's return type. Now you're in a situation where return types change all the time. Worse, if g's implementation stops using f, the signature of g should be changed but the compiler won't tell you that. Quickly you'll have functions that say they can return error `Foo but actually they cannot. Coding Expertise Historically beginners have been advised to avoid polymorphic variants. Although this seems to be less true now on, it is certainly the case that coding with them is a bit harder. Example: With this style, you end up wanting to define a function like: val with_file : string -> f : (t -> (=E2=80=98a, =E2=80=98b) Result.t -> (=E2=80=98a, [> err | =E2=80=98b]) Result.t The idea is that opening the file might return an error err. If the file is opened successfully, you call f, and f might return error `b. Thus, the result type should have errors [err | `b]. However, the above doesn't type check. The signature actually has to be (thanks to Sebastien Mondet for teaching me this years ago): val with_file : string -> f : (t -> (=E2=80=98a, [> err] as =E2=80=98b) Result.t -> (=E2=80=98a, =E2=80=98b) Result.t Do you want your user and developer base to deal with such signatures? It is unclear what this signature is saying. We now have err mentioned in the return type of f, but in our original intention err has nothing to do with f. Of course, there is an explanation that makes sense of it (but I'll skip it). I seem to be arguing strongly against the use of polymorphic variants, but I'm not. I'm really unsure what the right answer is. A lot of the problems I'm mentioning would go away if there was a project wide standardization of the particular polymorphic variants used. The value of using them is high, so actually I hope they will be used. On Fri, Oct 14, 2016 at 10:50 AM, Richard Mortier < richard.mortier@cl.cam.ac.uk> wrote: > On 14 October 2016 at 15:36, David Scott wrote: > >> Looks like we have a number of different conventions for the binds. D= o > we > >> want to have the same set of operators with and without Lwt support (a= nd > >> open the Infix module locally as needed) or separate operators that be > used > >> alongside each other? > > > > I'm curious what people recommend here -- I'm certainly open to adoptin= g > a > > common convention even if it involves a bit of churn. > > Purely personal anecdotal opinion: > FWIW the only addition to the standard Lwt use of `>>=3D` that I've > found intuitive / memorable enough (somehow) is `>>=3D?` for an operator > that handles Result types as described too. > > (TBH I have a hard time even keeping the meanings of `>>|=3D` / `>>|?` > in my head.) > > -- > Richard Mortier > richard.mortier@cl.cam.ac.uk > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > --94eb2c0724066590dc053ed55eb5 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Using polymorphic variants for the error type poses some c= hallenges. Here are some things to think about. (The following code assumes= `open Async.Std` because it already has the necessary combinators).
Error Unification

# let x =3D re= turn (Error `Bad);;
val x : ('a, [> `Bad ]) Result.t Defer= red.t =3D <abstr>

# let f ok= =3D if ok then return (Ok "all good") else return (Error `Error)= ;;
val f : bool -> (string, [> `Error ]) Result.t Deferred.= t =3D <fun>

# x >>=3D= ? f;;
- : (string, [> `Bad | `Error ]) Result.t =3D Core_kerne= l.Std.Result.Error `Bad

So that works nicely= . Two different error types get unified. Notice the inferred types of x and= f are open. Forcing a closed type breaks things:

=
# let x : (bool, [`Bad]) Result.t Deferred.t =3D return (Error `Bad);;=
val x : (bool, [ `Bad ]) Result.t Deferred.t =3D <abstr>

# x >>=3D? f;;
Error: Th= is expression has type =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0bool ->= ; (string, [> `Error ] as 'a) Result.t Deferred.t =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 but an expression was expe= cted of type =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0
=C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0bool -> (string, [ `Bad ]) Deferred.Result.t
<= div>=C2=A0 =C2=A0 =C2=A0 =C2=A0Type (string, 'a) Result.t Deferred.t is= not compatible with type
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(stri= ng, [ `Bad ]) Deferred.Result.t =3D
=C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0(string, [ `Bad ]) Result.t Deferred.t=C2=A0
=C2=A0 = =C2=A0 =C2=A0 =C2=A0The second variant type does not allow tag(s) `Error

So is the annotation on x wrong? Well, it type= checks, so it's not disallowed. But is it just bad style? Is there nev= er a reason to force a closed type? Could adding functions like Bunzli'= s open_error_msg resolve the matter easily enough?

Unification At Scale

In large code bases, you can= 't get around the problem because you'll surely introduce incompati= ble types.

# let x =3D return (Error (`Bad &q= uot;uh oh"));;
val x : ('a, [> `Bad of string ]) Resu= lt.t Deferred.t =3D <abstr>

# let= f ok =3D if ok then return (Ok "all good") else return (Error (`= Bad 42));;
val f : bool -> (string, [> `Bad of int ]) Resul= t.t Deferred.t =3D <fun>

# x >= >=3D? f;;
Error: This expression has type =C2=A0 =C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0bool -> (string, [> `Bad of int ] as 'a) = Result.t Deferred.t =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0but an= expression was expected of type =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=C2=A0
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0bool -> (string, [> `Bad of= string ] as 'b) Deferred.Result.t
=C2=A0 =C2=A0 =C2=A0 =C2= =A0Type (string, 'a) Result.t Deferred.t is not compatible with type
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0(string, 'b) Deferred.Result.= t =3D (string, 'b) Result.t Deferred.t=C2=A0
=C2=A0 =C2=A0 = =C2=A0 =C2=A0Types for tag `Bad are incompatible

=
Now you have to manually handle the errors every time x and f are used= in the same context. Should some support for that be standardized? We star= ted defining functions like

val bind_and_handle_er= ror
=C2=A0 : =C2=A0('a, 'e1) Result.t Deferred.t
=C2=A0 -> ('a -> ('b, 'e2) Result.t Deferred.t
=C2=A0 -> merge_error:('e1 -> 'e2 -> 'e3)
= =C2=A0 -> ('a, 'e3) Result.t Deferred.t

It's 3 arguments, so no more infix operator. If you end up with bind_a= nd_handle_error everywhere instead of (>>=3D?), you soon get annoyed.=


Writing MLI Files

The goal is to maintain precise error information, so you diligent= ly define unique variants for all your functions.=C2=A0Now you've got a= ll kinds of polymorphic variant types, getting unified, and growing into la= rger and larger types. Every function's signature is thus something lik= e

(int, [`Err1 of int | `Err2 of string | .... | `= Err20 of unit] Result.t

Type inference gives you t= his error the first time, but now you copy/paste into your mli. When some u= pstream code changes, your module no longer compiles because the error type= changed. So you have to keep copying/pasting the updated error type. That = gets annoying very fast.

An idea to avoid that is = to name your error types:

module A : sig
=C2=A0 type err1 =3D [`Err1 of string]
=C2=A0 val f : int -> = (string, err1) Result.t Deferred.t
end

m= odule B : sig
=C2=A0 type err2 =3D [`Err2 of int]
=C2= =A0 val g : unit -> (string, [err1 | err2]) Result.t Deferred.t
end

Now, even if you change type err1, the signa= ture for module B remains valid. However, you've introduced a different= annoyance; you have to name all your error types. Also, you've only av= oided one case. If g's implementation is modified to start using yet an= other function, then you do have to change g's signature. Note this is = very different from the usual case. Normally, calling out to additional cod= e in a function's implementation doesn't change that function's= return type. Now you're in a situation where return types change all t= he time. Worse, if g's implementation stops using f, the signature of g= should be changed but the compiler won't tell you that. Quickly you= 9;ll have functions that say they can return error `Foo but actually they c= annot.


Coding Expertise
<= br>
Historically beginners have been advised to avoid polymorphic= variants. Although this seems to be less true now on, it is certainly the = case that coding with them is a bit harder. Example:

With this style, you end up wanting to define a function like:
val with_file :
=C2=A0 =C2=A0 =C2=A0string -= >
=C2=A0 =C2=A0 =C2=A0f : (t -> (=E2=80=98a, =E2=80=98b) Re= sult.t ->
=C2=A0 =C2=A0 =C2=A0(=E2=80=98a, [> err | =E2=80= =98b]) Result.t

The idea is that opening the= file might return an error err. If the file is opened successfully, you ca= ll f, and f might return error `b. Thus, the result type should have errors= [err | `b]. However, the above doesn't type check. The signature actua= lly has to be (thanks to Sebastien Mondet for teaching me this years ago):<= /div>

val with_file :
=C2=A0 =C2=A0 =C2= =A0string ->
=C2=A0 =C2=A0 =C2=A0f : (t -> (=E2=80=98a, [&g= t; err] as =E2=80=98b) Result.t ->
=C2=A0 =C2=A0 =C2=A0(=E2=80= =98a, =E2=80=98b) Result.t

Do you want your = user and developer base to deal with such signatures? It is unclear what th= is signature is saying. We now have err mentioned in the return type of f, = but in our original intention err has nothing to do with f. Of course, ther= e is an explanation that makes sense of it (but I'll skip it).

I seem to be arguing strongly against the use of polymorph= ic variants, but I'm not. I'm really unsure what the right answer i= s. A lot of the problems I'm mentioning would go away if there was a pr= oject wide standardization of the particular polymorphic variants used. The= value of using them is high, so actually I hope they will be used.






On Fri, Oct 1= 4, 2016 at 10:50 AM, Richard Mortier <richard.mortier@cl.cam.ac= .uk> wrote:
On 14 October 2016 at 15:36, David Scott <scott.dj@gmail.com> wrote:
>> Looks like we have a number of different conventions for the binds= .=C2=A0 Do we
>> want to have the same set of operators with and without Lwt suppor= t (and
>> open the Infix module locally as needed) or separate operators tha= t be used
>> alongside each other?
>
> I'm curious what people recommend here -- I'm certainly open t= o adopting a
> common convention even if it involves a bit of churn.

Purely personal anecdotal opinion:
FWIW the only addition to the standard Lwt use of `>>=3D` that I'= ve
found intuitive / memorable enough (somehow) is `>>=3D?` for an opera= tor
that handles Result types as described too.

(TBH I have a hard time even keeping the meanings of `>>|=3D` / `>= >|?`
in my head.)

--
Richard Mortier
richard.mortier@cl.cam.ac.u= k

_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@lists= .xenproject.org
https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel

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bits=256 verify=OK); Fri, 14 Oct 2016 20:12:16 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by aserv0021.oracle.com (8.13.8/8.13.8) with ESMTP id u9EKCEqG013695 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 14 Oct 2016 20:12:15 GMT Received: from abhmp0004.oracle.com (abhmp0004.oracle.com [141.146.116.10]) by userv0121.oracle.com (8.13.8/8.13.8) with ESMTP id u9EKC8hp002967; Fri, 14 Oct 2016 20:12:14 GMT Received: from char.us.oracle.com (/10.137.176.158) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 14 Oct 2016 13:12:08 -0700 Received: by char.us.oracle.com (Postfix, from userid 1000) id 5DC796A0317; Fri, 14 Oct 2016 16:12:07 -0400 (EDT) Date: Fri, 14 Oct 2016 16:12:07 -0400 From: Konrad Rzeszutek Wilk To: Lars Kurth Message-ID: <20161014201207.GB22810@char.us.oracle.com> References: <1474656929-3528-1-git-send-email-lars.kurth@citrix.com> <1474656929-3528-2-git-send-email-lars.kurth@citrix.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1474656929-3528-2-git-send-email-lars.kurth@citrix.com> User-Agent: Mutt/1.6.2 (2016-07-01) X-Source-IP: aserv0021.oracle.com [141.146.126.233] Cc: xen-devel@lists.xenproject.org, win-pv-devel@lists.xenproject.org, committers@xenproject.org, mirageos-devel@lists.xenproject.org, xen-api@lists.xenproject.org Subject: Re: [MirageOS-devel] [PATCH v3 1/4] Code motion changes to make real patches easier to read X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gRnJpLCBTZXAgMjMsIDIwMTYgYXQgMDc6NTU6MjZQTSArMDEwMCwgTGFycyBLdXJ0aCB3cm90 ZToKPiBBZGRlZCBUT0MKPiBSZS1hcnJhbmdlZCBzZWN0aW9ucyBjb21wYXJlZCB0byBwcmV2aW91 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[141.146.126.233]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id u9EKCF1R021193 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 14 Oct 2016 20:12:16 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by aserv0021.oracle.com (8.13.8/8.13.8) with ESMTP id u9EKCEqG013695 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 14 Oct 2016 20:12:15 GMT Received: from abhmp0004.oracle.com (abhmp0004.oracle.com [141.146.116.10]) by userv0121.oracle.com (8.13.8/8.13.8) with ESMTP id u9EKC8hp002967; Fri, 14 Oct 2016 20:12:14 GMT Received: from char.us.oracle.com (/10.137.176.158) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 14 Oct 2016 13:12:08 -0700 Received: by char.us.oracle.com (Postfix, from userid 1000) id 5DC796A0317; Fri, 14 Oct 2016 16:12:07 -0400 (EDT) Date: Fri, 14 Oct 2016 16:12:07 -0400 From: Konrad Rzeszutek Wilk To: Lars Kurth Message-ID: <20161014201207.GB22810@char.us.oracle.com> References: <1474656929-3528-1-git-send-email-lars.kurth@citrix.com> <1474656929-3528-2-git-send-email-lars.kurth@citrix.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1474656929-3528-2-git-send-email-lars.kurth@citrix.com> User-Agent: Mutt/1.6.2 (2016-07-01) X-Source-IP: aserv0021.oracle.com [141.146.126.233] Cc: xen-devel@lists.xenproject.org, win-pv-devel@lists.xenproject.org, committers@xenproject.org, mirageos-devel@lists.xenproject.org, xen-api@lists.xenproject.org Subject: Re: [MirageOS-devel] [PATCH v3 1/4] Code motion changes to make real patches easier to read X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" 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id 104B36A0317; Fri, 14 Oct 2016 16:13:43 -0400 (EDT) Date: Fri, 14 Oct 2016 16:13:42 -0400 From: Konrad Rzeszutek Wilk To: Lars Kurth Message-ID: <20161014201342.GC22810@char.us.oracle.com> References: <1474656929-3528-1-git-send-email-lars.kurth@citrix.com> <1474656929-3528-3-git-send-email-lars.kurth@citrix.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1474656929-3528-3-git-send-email-lars.kurth@citrix.com> User-Agent: Mutt/1.6.2 (2016-07-01) X-Source-IP: aserv0022.oracle.com [141.146.126.234] Cc: xen-devel@lists.xenproject.org, win-pv-devel@lists.xenproject.org, committers@xenproject.org, mirageos-devel@lists.xenproject.org, xen-api@lists.xenproject.org Subject: Re: [MirageOS-devel] [PATCH v3 2/4] Added document containing governance related todo list X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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<20161014201342.GC22810@char.us.oracle.com> References: <1474656929-3528-1-git-send-email-lars.kurth@citrix.com> <1474656929-3528-3-git-send-email-lars.kurth@citrix.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <1474656929-3528-3-git-send-email-lars.kurth@citrix.com> User-Agent: Mutt/1.6.2 (2016-07-01) X-Source-IP: aserv0022.oracle.com [141.146.126.234] Cc: xen-devel@lists.xenproject.org, win-pv-devel@lists.xenproject.org, committers@xenproject.org, mirageos-devel@lists.xenproject.org, xen-api@lists.xenproject.org Subject: Re: [MirageOS-devel] [PATCH v3 2/4] Added document containing governance related todo list X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" 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[209.85.213.169]) by smtp.gmail.com with ESMTPSA id 3sm1923001ywb.11.2016.10.17.07.53.30 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Oct 2016 07:53:31 -0700 (PDT) Received: by mail-yb0-f169.google.com with SMTP id x128so11014778ybg.1 for ; Mon, 17 Oct 2016 07:53:30 -0700 (PDT) X-Received: by 10.37.116.200 with SMTP id p191mr24598223ybc.28.1476716009872; Mon, 17 Oct 2016 07:53:29 -0700 (PDT) MIME-Version: 1.0 Received: by 10.129.161.16 with HTTP; Mon, 17 Oct 2016 07:53:28 -0700 (PDT) In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> From: Richard Mortier Date: Mon, 17 Oct 2016 15:53:28 +0100 X-Gmail-Original-Message-ID: Message-ID: To: Ashish Agarwal Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org 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[209.85.213.169]) by smtp.gmail.com with ESMTPSA id 3sm1923001ywb.11.2016.10.17.07.53.30 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Oct 2016 07:53:31 -0700 (PDT) Received: by mail-yb0-f169.google.com with SMTP id x128so11014778ybg.1 for ; Mon, 17 Oct 2016 07:53:30 -0700 (PDT) X-Received: by 10.37.116.200 with SMTP id p191mr24598223ybc.28.1476716009872; Mon, 17 Oct 2016 07:53:29 -0700 (PDT) MIME-Version: 1.0 Received: by 10.129.161.16 with HTTP; Mon, 17 Oct 2016 07:53:28 -0700 (PDT) In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> From: Richard Mortier Date: Mon, 17 Oct 2016 15:53:28 +0100 X-Gmail-Original-Message-ID: Message-ID: To: Ashish Agarwal Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org 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h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=s/zfWcULl1tvoDFrhN+oZkuDWrnFmA2QE1QwOyTmmXM=; b=SD2g9JDvV08S4qNlXBnqfV6YdMy8+pdgp77x0u8iWe7vzK8EVwkICk7xt6a2Guog49 +tetP153DG1smwjrNA6wrtJK5SbWWB1kukwqxnpt3q7cjG3psHyOcw4SrbY9tFLBwW2h 4Soz0CIMsFVYkEge/ybDfuHmfPtdWtSaP5+fdEVB/K994kwk6VLizgUzi56HefA4I6zR ETfBuS56cJ5pbdwSxFH96e/jZM8bQys1UrRGSZGUYqer4Syx8dynpLpXz/UrdXS2JFfp EY05TQjKUe+LbEHkqqK2H1zd/Nv1OYskO3ts+nkKd27jwOHiW8SvYfO7VEa2ssYBQGf+ PiWw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=s/zfWcULl1tvoDFrhN+oZkuDWrnFmA2QE1QwOyTmmXM=; b=FvHFQoK2t/14rNQ6o5iCHnjvY6Ha/DEB7196rN8swsXgkvRweouVQ90vBcWUPkP1rx GtNP7L3g27IYkPKGH2YdthxQzciuLBcVJBdm4FdY7BXcdcb63hFM9cCfWm1fvSq2zlc4 6JsAGwiZgZ4sPo/kPCIHrDbaxGWG0OdmOTJlfWKAu1RF+uOBfAxFhP2EV9jViyg/TtNI N1q0/k+ICwp5tgDiQpT2BQvm/QJmnRXUttf08MxuinE9nCyDUW+OZ0gjxWuS2mf5QWjH 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boundary="===============5241375371624317848==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============5241375371624317848== Content-Type: multipart/alternative; boundary=94eb2c05e676f377c7053f12dfcc --94eb2c05e676f377c7053f12dfcc Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Mon, Oct 17, 2016 at 10:53 AM, Richard Mortier < richard.mortier@cl.cam.ac.uk> wrote: > What was your experience here? Why *would* one force a closed type? > First, a terminology correction. What I was calling a "closed" variant is actually an "exact" variant. A "closed" variant is of the form [< ... ]. Regarding what I do, the point is that an exact, open, and closed variant all say different things, so I try to annotate my values with the type tha= t matches my intention, which is usually an exact variant. Sometimes I can't= get my code to compile then, e.g. an exact variant in combination with a private type, so then I do whatever necessary to make the code compile. No= t a helpful answer; maybe someone knows the theory better and can give a clearer explanation of what works when. > Now you have to manually handle the errors every time x and f are used i= n > > the same context. Should some support for that be standardized? > > Is this got around by naming types per your suggestion below? > No. This is=20inherently something the compiler can't help you with. You'v= e got 2 incompatible error types. You have to manually say how to merge them= to a single error type. Normally, > > calling out to additional code in a function's implementation doesn't > change > > that function's return type. > > That's true, but perhaps not unexpected given the error possibilities > are explicitly being exposed in the type? > Right, you're getting exactly what you asked for. > Now you're in a situation where return types > > change all the time. > > "all the time" sounds a bit over-stated :) How often in practice did > this sort of thing happen? Good point. The frequency at which your types change is really the main issue. In my experience, it was unbearably often. This was a couple of years ago, and all of my repos were in lots of flux. As your APIs stabilize, your types change less often. So perhaps the Mirage project switching to this style now is the correct timing. However, I think polymorphic variant error types don't stabilize as easily= . Somehow what counts as an error and what exact information you might want from an error type is less clear than in the Ok case. The Ok case drives your functionality. The Error case doesn't. Also, in the Ok case, the library author usually knows what to provide. In the Error case, often the= library's user needs to specify what they need. This reversal leads to mor= e code churn. > > Quickly you'll have functions that say they can return error `Foo but > > actually they cannot. > > That's true. Can't think of a useful way round that one. > (But is any alternative better?) > I can't think of any sane solution. Maybe some tooling to automatically erase constructors one at a time and see if your code still type checks, but that's getting absurd. It seems error handling is an unsolved problem. The tension is that errors= are something you usually want to ignore, but when you do want to handle them, you want to do so with a high level of precision. (Could algebraic effects help?) Here's one idea that could work now. Define precise error types within eac= h of your modules, and provide de/serialization functions from/to string. Pass around the string type as your error type, avoiding all the problems mentioned. When some client code wants to handle the error more precisely,= they can call your deserializer. The client has to know which errors they want to handle, so they know which deserializers to call. The client can't= discover the full list of possible errors so you lose completeness. Maybe that's okay; anyway there's no such thing as handling *all* errors. There is a performance penalty for the serialization/deserialization. > val with_file : > > string -> > > f : (t -> (=E2=80=98a, [> err] as =E2=80=98b) Result.t -> > > (=E2=80=98a, =E2=80=98b) Result.t > > Well, I at least would be interested in knowing if you've time! > Off-list if you prefer or it would bore people... :) > I'll try but would welcome a better explanation from the experts. For clarity, let's define type err =3D [ `File_doesnt_exist | `File_is_dir ] The intention is: - The implementation of with_file needs to open the file with the given name. This could lead to errors of type err. - The user will provide some function f operating on the opened file, whic= h could lead to have some errors of type 'b. - Thus, the overall result can have errors of their union, [err | 'b]. But what you end up having to write includes err in f's return type. This seems odd because the point was that err is all the errors that can happen= with the rest of the code, everything except what f does. However, there's= no reason f couldn't also return err values, in addition to some others, which is exactly what the correct version of the code says. Not allowing this possibility would mean we want to insist that f's return type exclude= s any value of type err, and I guess that's not expressible in the type system (Or is it? However, even if it is, that's not really what we originally meant, so the above solution is I think the correct one). --94eb2c05e676f377c7053f12dfcc Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On = Mon, Oct 17, 2016 at 10:53 AM, Richard Mortier <richard.morti= er@cl.cam.ac.uk> wrote:
=C2=A0
What was your experience here? Why *wou= ld* one force a closed type?

First, a = terminology correction. What I was calling a "closed" variant is= actually an "exact" variant. A "closed" variant is of= the form [< ... ]. Regarding what I do, the point is that an exact, op= en, and closed variant all say different things, so I try to annotate my v= alues with the type that matches my intention, which is usually an exact v= ariant. Sometimes I can't get my code to compile then, e.g. an exact v= ariant in combination with a private type, so then I do whatever necessary= to make the code compile. Not a helpful answer; maybe someone knows the t= heory better and can give a clearer explanation of what works when.
<= div>

> Now you have to manually handle the errors eve= ry time x and f are used in
> the same context. Should some support for that be standardized?

Is this got around by naming types per your suggestion below?

No. This is inherently something the compil= er can't help you with. You've got 2 incompatible error types. You= have to manually say how to merge them to a single error type.
=

Normally,
> calling out to additional code in a function's implementation doe= sn't change
> that function's return type.

That's true, but perhaps not unexpected given the error po= ssibilities
are explicitly being exposed in the type?

<= div>Right, you're getting exactly what you asked for.



> Now you're in a situation where return types
> change all the time.

"all the time" sounds a bit over-stated :) How often in p= ractice did
this sort of thing happen?

Good point. The= frequency at which your types change is really the main issue. In my expe= rience, it was unbearably often. This was a couple of years ago, and all o= f my repos were in lots of flux. As your APIs stabilize, your types change= less often. So perhaps the Mirage project switching to this style now is = the correct timing.

However, I think polymorphic = variant error types don't stabilize as easily. Somehow what counts as = an error and what exact information you might want from an error type is l= ess clear than in the Ok case. The Ok case drives your functionality. The = Error case doesn't. Also, in the Ok case, the library author usually k= nows what to provide. In the Error case, often the library's user need= s to specify what they need. This reversal leads to more code churn.
=

=C2=A0
> Quickly you'll have functions that say they can return error `Foo= but
> actually they cannot.

That's true. Can't think of a useful way round that one. (But is any alternative better?)


<= /div>
I can't think of any sane solution. Maybe some tooling to au= tomatically erase constructors one at a time and see if your code still ty= pe checks, but that's getting absurd.

It seem= s error handling is an unsolved problem. The tension is that errors are so= mething you usually want to ignore, but when you do want to handle them, y= ou want to do so with a high level of precision. (Could algebraic effects = help?)

Here's one idea that could work now. D= efine precise error types within each of your modules, and provide de/seri= alization functions from/to string. Pass around the string type as your er= ror type, avoiding all the problems mentioned. When some client code wants= to handle the error more precisely, they can call your deserializer. The = client has to know which errors they want to handle, so they know which de= serializers to call. The client can't discover the full list of possib= le errors so you lose completeness. Maybe that's okay; anyway there= 9;s no such thing as handling *all* errors. There is a performance penalty= for the serialization/deserialization.


> val with_file :
>=C2=A0 =C2=A0 =C2=A0 string ->
>=C2=A0 =C2=A0 =C2=A0 f : (t -> (=E2=80=98a, [> err] as =E2=80=98= b) Result.t ->
>=C2=A0 =C2=A0 =C2=A0 (=E2=80=98a, =E2=80=98b) Result.t

Well, I at least would be interested in knowing if you've time!=
Off-list if you prefer or it would bore people... :)
=
I'll try but would welcome a better explanation from th= e experts.=C2=A0For clarity, let's define

typ= e err =3D [ `File_doesnt_exist | `File_is_dir ]

T= he intention is:

- The implementation of with_fil= e needs to open the file with the given name. This could lead to errors of= type err.
- The user will provide some function f operating on = the opened file, which could lead to have some errors of type 'b.
- Thus, the overall result can have errors of their union, [err | &#= 39;b].

But what you end up having to write includ= es err in f's return type. This seems odd because the point was that e= rr is all the errors that can happen with the rest of the code, everything= except what f does. However, there's no reason f couldn't also re= turn err values, in addition to some others, which is exactly what the cor= rect version of the code says. Not allowing this possibility would mean we= want to insist that f's return type excludes any value of type err, a= nd I guess that's not expressible in the type system (Or is it? Howeve= r, even if it is, that's not really what we originally meant, so the a= bove solution is I think the correct one).

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banners=-,-,- X-VirusChecked: Checked Received: (qmail 15298 invoked from network); 17 Oct 2016 17:26:23 -0000 Received: from mail-qk0-f175.google.com (HELO mail-qk0-f175.google.com) (209.85.220.175) by server-8.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 17 Oct 2016 17:26:23 -0000 Received: by mail-qk0-f175.google.com with SMTP id z190so247046986qkc.2 for ; Mon, 17 Oct 2016 10:26:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=s/zfWcULl1tvoDFrhN+oZkuDWrnFmA2QE1QwOyTmmXM=; b=SD2g9JDvV08S4qNlXBnqfV6YdMy8+pdgp77x0u8iWe7vzK8EVwkICk7xt6a2Guog49 +tetP153DG1smwjrNA6wrtJK5SbWWB1kukwqxnpt3q7cjG3psHyOcw4SrbY9tFLBwW2h 4Soz0CIMsFVYkEge/ybDfuHmfPtdWtSaP5+fdEVB/K994kwk6VLizgUzi56HefA4I6zR ETfBuS56cJ5pbdwSxFH96e/jZM8bQys1UrRGSZGUYqer4Syx8dynpLpXz/UrdXS2JFfp EY05TQjKUe+LbEHkqqK2H1zd/Nv1OYskO3ts+nkKd27jwOHiW8SvYfO7VEa2ssYBQGf+ PiWw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=s/zfWcULl1tvoDFrhN+oZkuDWrnFmA2QE1QwOyTmmXM=; b=FvHFQoK2t/14rNQ6o5iCHnjvY6Ha/DEB7196rN8swsXgkvRweouVQ90vBcWUPkP1rx GtNP7L3g27IYkPKGH2YdthxQzciuLBcVJBdm4FdY7BXcdcb63hFM9cCfWm1fvSq2zlc4 6JsAGwiZgZ4sPo/kPCIHrDbaxGWG0OdmOTJlfWKAu1RF+uOBfAxFhP2EV9jViyg/TtNI N1q0/k+ICwp5tgDiQpT2BQvm/QJmnRXUttf08MxuinE9nCyDUW+OZ0gjxWuS2mf5QWjH Zc+9NfAzELHeEWemng2aVuXA39vqHvg6cp8ypmT1WaQy05GwcWAMW4l0tIo8SZQRhDgi ob/g== X-Gm-Message-State: AA6/9RlNLnQWzDvcheNoJG+mRLNdHW6OnJD6QfEbChnh9zfHEWTpeG5m1iCff+jXXN94H+qDH0ykhfC5o2t2xw== X-Received: by 10.55.100.150 with SMTP id y144mr24279676qkb.281.1476725182787; Mon, 17 Oct 2016 10:26:22 -0700 (PDT) MIME-Version: 1.0 Received: by 10.55.185.7 with HTTP; Mon, 17 Oct 2016 10:26:02 -0700 (PDT) In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> From: Ashish Agarwal Date: Mon, 17 Oct 2016 13:26:02 -0400 Message-ID: To: Richard Mortier Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5241375371624317848==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============5241375371624317848== Content-Type: multipart/alternative; boundary=94eb2c05e676f377c7053f12dfcc --94eb2c05e676f377c7053f12dfcc Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Mon, Oct 17, 2016 at 10:53 AM, Richard Mortier < richard.mortier@cl.cam.ac.uk> wrote: > What was your experience here? Why *would* one force a closed type? > First, a terminology correction. What I was calling a "closed" variant is actually an "exact" variant. A "closed" variant is of the form [< ... ]. Regarding what I do, the point is that an exact, open, and closed variant all say different things, so I try to annotate my values with the type tha= t matches my intention, which is usually an exact variant. Sometimes I can't= get my code to compile then, e.g. an exact variant in combination with a private type, so then I do whatever necessary to make the code compile. No= t a helpful answer; maybe someone knows the theory better and can give a clearer explanation of what works when. > Now you have to manually handle the errors every time x and f are used i= n > > the same context. Should some support for that be standardized? > > Is this got around by naming types per your suggestion below? > No. This is=20inherently something the compiler can't help you with. You'v= e got 2 incompatible error types. You have to manually say how to merge them= to a single error type. Normally, > > calling out to additional code in a function's implementation doesn't > change > > that function's return type. > > That's true, but perhaps not unexpected given the error possibilities > are explicitly being exposed in the type? > Right, you're getting exactly what you asked for. > Now you're in a situation where return types > > change all the time. > > "all the time" sounds a bit over-stated :) How often in practice did > this sort of thing happen? Good point. The frequency at which your types change is really the main issue. In my experience, it was unbearably often. This was a couple of years ago, and all of my repos were in lots of flux. As your APIs stabilize, your types change less often. So perhaps the Mirage project switching to this style now is the correct timing. However, I think polymorphic variant error types don't stabilize as easily= . Somehow what counts as an error and what exact information you might want from an error type is less clear than in the Ok case. The Ok case drives your functionality. The Error case doesn't. Also, in the Ok case, the library author usually knows what to provide. In the Error case, often the= library's user needs to specify what they need. This reversal leads to mor= e code churn. > > Quickly you'll have functions that say they can return error `Foo but > > actually they cannot. > > That's true. Can't think of a useful way round that one. > (But is any alternative better?) > I can't think of any sane solution. Maybe some tooling to automatically erase constructors one at a time and see if your code still type checks, but that's getting absurd. It seems error handling is an unsolved problem. The tension is that errors= are something you usually want to ignore, but when you do want to handle them, you want to do so with a high level of precision. (Could algebraic effects help?) Here's one idea that could work now. Define precise error types within eac= h of your modules, and provide de/serialization functions from/to string. Pass around the string type as your error type, avoiding all the problems mentioned. When some client code wants to handle the error more precisely,= they can call your deserializer. The client has to know which errors they want to handle, so they know which deserializers to call. The client can't= discover the full list of possible errors so you lose completeness. Maybe that's okay; anyway there's no such thing as handling *all* errors. There is a performance penalty for the serialization/deserialization. > val with_file : > > string -> > > f : (t -> (=E2=80=98a, [> err] as =E2=80=98b) Result.t -> > > (=E2=80=98a, =E2=80=98b) Result.t > > Well, I at least would be interested in knowing if you've time! > Off-list if you prefer or it would bore people... :) > I'll try but would welcome a better explanation from the experts. For clarity, let's define type err =3D [ `File_doesnt_exist | `File_is_dir ] The intention is: - The implementation of with_file needs to open the file with the given name. This could lead to errors of type err. - The user will provide some function f operating on the opened file, whic= h could lead to have some errors of type 'b. - Thus, the overall result can have errors of their union, [err | 'b]. But what you end up having to write includes err in f's return type. This seems odd because the point was that err is all the errors that can happen= with the rest of the code, everything except what f does. However, there's= no reason f couldn't also return err values, in addition to some others, which is exactly what the correct version of the code says. Not allowing this possibility would mean we want to insist that f's return type exclude= s any value of type err, and I guess that's not expressible in the type system (Or is it? However, even if it is, that's not really what we originally meant, so the above solution is I think the correct one). --94eb2c05e676f377c7053f12dfcc Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On = Mon, Oct 17, 2016 at 10:53 AM, Richard Mortier <richard.morti= er@cl.cam.ac.uk> wrote:
=C2=A0
What was your experience here? Why *wou= ld* one force a closed type?

First, a = terminology correction. What I was calling a "closed" variant is= actually an "exact" variant. A "closed" variant is of= the form [< ... ]. Regarding what I do, the point is that an exact, op= en, and closed variant all say different things, so I try to annotate my v= alues with the type that matches my intention, which is usually an exact v= ariant. Sometimes I can't get my code to compile then, e.g. an exact v= ariant in combination with a private type, so then I do whatever necessary= to make the code compile. Not a helpful answer; maybe someone knows the t= heory better and can give a clearer explanation of what works when.
<= div>

> Now you have to manually handle the errors eve= ry time x and f are used in
> the same context. Should some support for that be standardized?

Is this got around by naming types per your suggestion below?

No. This is inherently something the compil= er can't help you with. You've got 2 incompatible error types. You= have to manually say how to merge them to a single error type.
=

Normally,
> calling out to additional code in a function's implementation doe= sn't change
> that function's return type.

That's true, but perhaps not unexpected given the error po= ssibilities
are explicitly being exposed in the type?

<= div>Right, you're getting exactly what you asked for.



> Now you're in a situation where return types
> change all the time.

"all the time" sounds a bit over-stated :) How often in p= ractice did
this sort of thing happen?

Good point. The= frequency at which your types change is really the main issue. In my expe= rience, it was unbearably often. This was a couple of years ago, and all o= f my repos were in lots of flux. As your APIs stabilize, your types change= less often. So perhaps the Mirage project switching to this style now is = the correct timing.

However, I think polymorphic = variant error types don't stabilize as easily. Somehow what counts as = an error and what exact information you might want from an error type is l= ess clear than in the Ok case. The Ok case drives your functionality. The = Error case doesn't. Also, in the Ok case, the library author usually k= nows what to provide. In the Error case, often the library's user need= s to specify what they need. This reversal leads to more code churn.
=

=C2=A0
> Quickly you'll have functions that say they can return error `Foo= but
> actually they cannot.

That's true. Can't think of a useful way round that one. (But is any alternative better?)


<= /div>
I can't think of any sane solution. Maybe some tooling to au= tomatically erase constructors one at a time and see if your code still ty= pe checks, but that's getting absurd.

It seem= s error handling is an unsolved problem. The tension is that errors are so= mething you usually want to ignore, but when you do want to handle them, y= ou want to do so with a high level of precision. (Could algebraic effects = help?)

Here's one idea that could work now. D= efine precise error types within each of your modules, and provide de/seri= alization functions from/to string. Pass around the string type as your er= ror type, avoiding all the problems mentioned. When some client code wants= to handle the error more precisely, they can call your deserializer. The = client has to know which errors they want to handle, so they know which de= serializers to call. The client can't discover the full list of possib= le errors so you lose completeness. Maybe that's okay; anyway there= 9;s no such thing as handling *all* errors. There is a performance penalty= for the serialization/deserialization.


> val with_file :
>=C2=A0 =C2=A0 =C2=A0 string ->
>=C2=A0 =C2=A0 =C2=A0 f : (t -> (=E2=80=98a, [> err] as =E2=80=98= b) Result.t ->
>=C2=A0 =C2=A0 =C2=A0 (=E2=80=98a, =E2=80=98b) Result.t

Well, I at least would be interested in knowing if you've time!=
Off-list if you prefer or it would bore people... :)
=
I'll try but would welcome a better explanation from th= e experts.=C2=A0For clarity, let's define

typ= e err =3D [ `File_doesnt_exist | `File_is_dir ]

T= he intention is:

- The implementation of with_fil= e needs to open the file with the given name. This could lead to errors of= type err.
- The user will provide some function f operating on = the opened file, which could lead to have some errors of type 'b.
- Thus, the overall result can have errors of their union, [err | &#= 39;b].

But what you end up having to write includ= es err in f's return type. This seems odd because the point was that e= rr is all the errors that can happen with the rest of the code, everything= except what f does. However, there's no reason f couldn't also re= turn err values, in addition to some others, which is exactly what the cor= rect version of the code says. Not allowing this possibility would mean we= want to insist that f's return type excludes any value of type err, a= nd I guess that's not expressible in the type system (Or is it? Howeve= r, even if it is, that's not really what we originally meant, so the a= bove solution is I think the correct one).

--94eb2c05e676f377c7053f12dfcc-- --===============5241375371624317848== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============5241375371624317848==-- From mirageos-devel-bounces@lists.xenproject.org Mon Oct 17 19:18:25 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 17 Oct 2016 19:18:25 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwDQQ-0004Gd-2x; Mon, 17 Oct 2016 19:18:18 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwDQO-0004GX-Qb for mirageos-devel@lists.xenproject.org; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 3228 invoked from network); 17 Oct 2016 19:18:15 -0000 Received: from mail6.webfaction.com (HELO smtp.webfaction.com) (74.55.86.74) by server-2.tower-21.messagelabs.com with DHE-RSA-AES256-SHA encrypted SMTP; 17 Oct 2016 19:18:15 -0000 Received: from [192.168.5.177] (89-164-107-225.dsl.iskon.hr [89.164.107.225]) by smtp.webfaction.com (Postfix) with ESMTP id 3579520EBAFF; Mon, 17 Oct 2016 19:18:09 +0000 (UTC) Date: Mon, 17 Oct 2016 21:18:07 +0200 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: Ashish Agarwal Message-ID: <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: "=?utf-8?Q?mirageos-devel=40lists.xenproject.org?=" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 3228 invoked from network); 17 Oct 2016 19:18:15 -0000 Received: from mail6.webfaction.com (HELO smtp.webfaction.com) (74.55.86.74) by server-2.tower-21.messagelabs.com with DHE-RSA-AES256-SHA encrypted SMTP; 17 Oct 2016 19:18:15 -0000 Received: from [192.168.5.177] (89-164-107-225.dsl.iskon.hr [89.164.107.225]) by smtp.webfaction.com (Postfix) with ESMTP id 3579520EBAFF; Mon, 17 Oct 2016 19:18:09 +0000 (UTC) Date: Mon, 17 Oct 2016 21:18:07 +0200 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: Ashish Agarwal Message-ID: <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: "=?utf-8?Q?mirageos-devel=40lists.xenproject.org?=" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 37243 invoked from network); 17 Oct 2016 19:40:26 -0000 Received: from mail-qk0-f177.google.com (HELO mail-qk0-f177.google.com) (209.85.220.177) by server-10.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 17 Oct 2016 19:40:26 -0000 Received: by mail-qk0-f177.google.com with SMTP id z190so254314397qkc.2 for ; Mon, 17 Oct 2016 12:40:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=uXcW9xOvXdmlN8jbQvRIEd8cwvgYgDLeYxNfKNxFoK8=; b=DGBPYz1HNz4MNc1RlLC3kCgp3fj8jvkxGIoLFib6dwQbSuPGYp12wSIB41Af+SL1px 6xNUHPMi0zLs3qnFjzVOtqc5trnWi6sP6BUjXWe8X/lfhkXjS70ueGE2ToHYxUYrM2jj rJd0Bl28y2hFf/lA77zTPoTsEMSRE0GQA6PkDIw/gJw3s7POzSFIYlk2dSPP2MG5uCnH ycX+eZqtvHwkkrqQVEhd3fgbBNVrC+xGkCvlvifgVdQu3BhjDkvMJM9wSm92w9brzAT4 F7VOGsYT0o7LMjw3d4oabzp+uxAdhET0dUqit+YJhNEQsltv3FKdzJMgiiaUSL0Ptijx 25GQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=uXcW9xOvXdmlN8jbQvRIEd8cwvgYgDLeYxNfKNxFoK8=; b=ia1gB1E6JGoagxCWJONpsoZrtfmJzwPc1U7ZbOK9ImXxrlv5wMWCGKLFUdHPvAGkfF 3R0wGUF1Vtvf4kD2RGr3gpog9Bt54c3wxngddk5Cgtg4HZ7hlWWYdnkOZTFix1KqU+sl ZhXCd+XTlkJ0/NSnN2ihVtoWYIb/mF9zso87889BB0NGHPJZ/uWmlw5XKO+yEqEVG8x7 W7AmGhKsqph3QbhMlGXBxD9886nSkM1CJSDIg+kpAmQvQd0QdixDGdV42Dwkw468jmh1 UpEFI5aHEl26WNF1w0L5sjBBCrUd4VdvucPNNVQrOChlTfb+4N1N/GgoVRwnYy8/W7qB KRuw== X-Gm-Message-State: AA6/9Rkye8oxxfLjnaFXXKdxPDrzxlYuyNhERe/9NmfUhfNN3c9Iid9/6Ycpf39L2EnwCLgDnS371wVwIGdlPw== X-Received: by 10.55.143.129 with SMTP id r123mr24315141qkd.39.1476733225220; Mon, 17 Oct 2016 12:40:25 -0700 (PDT) MIME-Version: 1.0 Received: by 10.55.185.7 with HTTP; Mon, 17 Oct 2016 12:40:04 -0700 (PDT) In-Reply-To: <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> From: Ashish Agarwal Date: Mon, 17 Oct 2016 15:40:04 -0400 Message-ID: To: =?UTF-8?Q?Daniel_B=C3=BCnzli?= Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============7513895841146980330==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============7513895841146980330== Content-Type: multipart/alternative; boundary=94eb2c083bc0513fc0053f14bfa0 --94eb2c083bc0513fc0053f14bfa0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Mon, Oct 17, 2016 at 3:18 PM, Daniel B=C3=BCnzli wrote: You want to make a clear distinction between the errors of the bracket and= > those of the client function (especially if these end up having overlapp= ing > cases) so you rather want either: > > 1) string -> f:(t -> 'a) -> ('a, [> err]) result > 2) string -> f:(t -> ('a, 'b) result) -> (('a, 'b) result, [> err]) resu= lt > True, these are even more precise, but the types are getting even more hairy now. Are there good combinators that help you anymore, or do we end up doing a lot of explicit match cases. I find these claims dubious. For example in distributed computing or > networking, handling connection errors drives as much your functionality= as > the connected (Ok) case. > > Finding an API's error handling strategy is the cornerstore of API desig= n, > once you have figured that out and your names you are mostly done. I agree that good error handling is critical and library writers should strive to make it possible. I might even go further and say the binary Ok/Error separation is superficial. Whether we call something an error or not, or whether it is a cornerstone or merely important, the issue is we don't have a good way of writing code where every function might return a different set of variant constructors, and you want to handle a subset of them to varying degrees. --94eb2c083bc0513fc0053f14bfa0 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On = Mon, Oct 17, 2016 at 3:18 PM, Daniel B=C3=BCnzli <daniel.buenz= li@erratique.ch> wrote:

You want to make a clear distinction between the errors of the= bracket and those of the client function (especially if these end up havi= ng overlapping cases) so you rather want either:

1) string -> f:(t -> 'a) -> ('a, [> err]) result
2) string -> f:(t -> ('a, 'b) result) -> (('a, 'b= ) result, [> err]) result

True, the= se are even more precise, but the types are getting even more hairy now. A= re there good combinators that help you anymore, or do we end up doing a l= ot of explicit match cases.


I find these claims dubious. For example in distribut= ed computing or networking, handling connection errors drives as much your= functionality as the connected (Ok) case.

Finding an API's error handling strategy is the cornerstore of API des= ign, once you have figured that out and your names you are mostly done.

I agree that good error handling is critical= and library writers should strive to make it possible. I might even go fu= rther and say the binary Ok/Error separation is superficial. Whether we ca= ll something an error or not, or whether it is a cornerstone or merely imp= ortant, the issue is we don't have a good way of writing code where ev= ery function might return a different set of variant constructors, and you= want to handle a subset of them to varying degrees.

--94eb2c083bc0513fc0053f14bfa0-- --===============7513895841146980330== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============7513895841146980330==-- From mirageos-devel-bounces@lists.xenproject.org Mon Oct 17 19:40:36 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 17 Oct 2016 19:40:36 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwDlw-0005jV-Qw; Mon, 17 Oct 2016 19:40:32 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwDlv-0005jP-AP for mirageos-devel@lists.xenproject.org; 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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=uXcW9xOvXdmlN8jbQvRIEd8cwvgYgDLeYxNfKNxFoK8=; b=ia1gB1E6JGoagxCWJONpsoZrtfmJzwPc1U7ZbOK9ImXxrlv5wMWCGKLFUdHPvAGkfF 3R0wGUF1Vtvf4kD2RGr3gpog9Bt54c3wxngddk5Cgtg4HZ7hlWWYdnkOZTFix1KqU+sl ZhXCd+XTlkJ0/NSnN2ihVtoWYIb/mF9zso87889BB0NGHPJZ/uWmlw5XKO+yEqEVG8x7 W7AmGhKsqph3QbhMlGXBxD9886nSkM1CJSDIg+kpAmQvQd0QdixDGdV42Dwkw468jmh1 UpEFI5aHEl26WNF1w0L5sjBBCrUd4VdvucPNNVQrOChlTfb+4N1N/GgoVRwnYy8/W7qB KRuw== X-Gm-Message-State: AA6/9Rkye8oxxfLjnaFXXKdxPDrzxlYuyNhERe/9NmfUhfNN3c9Iid9/6Ycpf39L2EnwCLgDnS371wVwIGdlPw== X-Received: by 10.55.143.129 with SMTP id r123mr24315141qkd.39.1476733225220; Mon, 17 Oct 2016 12:40:25 -0700 (PDT) MIME-Version: 1.0 Received: by 10.55.185.7 with HTTP; Mon, 17 Oct 2016 12:40:04 -0700 (PDT) In-Reply-To: <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> From: Ashish Agarwal Date: Mon, 17 Oct 2016 15:40:04 -0400 Message-ID: To: =?UTF-8?Q?Daniel_B=C3=BCnzli?= Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============7513895841146980330==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============7513895841146980330== Content-Type: multipart/alternative; boundary=94eb2c083bc0513fc0053f14bfa0 --94eb2c083bc0513fc0053f14bfa0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Mon, Oct 17, 2016 at 3:18 PM, Daniel B=C3=BCnzli wrote: You want to make a clear distinction between the errors of the bracket and= > those of the client function (especially if these end up having overlapp= ing > cases) so you rather want either: > > 1) string -> f:(t -> 'a) -> ('a, [> err]) result > 2) string -> f:(t -> ('a, 'b) result) -> (('a, 'b) result, [> err]) resu= lt > True, these are even more precise, but the types are getting even more hairy now. Are there good combinators that help you anymore, or do we end up doing a lot of explicit match cases. I find these claims dubious. For example in distributed computing or > networking, handling connection errors drives as much your functionality= as > the connected (Ok) case. > > Finding an API's error handling strategy is the cornerstore of API desig= n, > once you have figured that out and your names you are mostly done. I agree that good error handling is critical and library writers should strive to make it possible. I might even go further and say the binary Ok/Error separation is superficial. Whether we call something an error or not, or whether it is a cornerstone or merely important, the issue is we don't have a good way of writing code where every function might return a different set of variant constructors, and you want to handle a subset of them to varying degrees. --94eb2c083bc0513fc0053f14bfa0 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On = Mon, Oct 17, 2016 at 3:18 PM, Daniel B=C3=BCnzli <daniel.buenz= li@erratique.ch> wrote:

You want to make a clear distinction between the errors of the= bracket and those of the client function (especially if these end up havi= ng overlapping cases) so you rather want either:

1) string -> f:(t -> 'a) -> ('a, [> err]) result
2) string -> f:(t -> ('a, 'b) result) -> (('a, 'b= ) result, [> err]) result

True, the= se are even more precise, but the types are getting even more hairy now. A= re there good combinators that help you anymore, or do we end up doing a l= ot of explicit match cases.


I find these claims dubious. For example in distribut= ed computing or networking, handling connection errors drives as much your= functionality as the connected (Ok) case.

Finding an API's error handling strategy is the cornerstore of API des= ign, once you have figured that out and your names you are mostly done.

I agree that good error handling is critical= and library writers should strive to make it possible. I might even go fu= rther and say the binary Ok/Error separation is superficial. Whether we ca= ll something an error or not, or whether it is a cornerstone or merely imp= ortant, the issue is we don't have a good way of writing code where ev= ery function might return a different set of variant constructors, and you= want to handle a subset of them to varying degrees.

--94eb2c083bc0513fc0053f14bfa0-- --===============7513895841146980330== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============7513895841146980330==-- From mirageos-devel-bounces@lists.xenproject.org Mon Oct 17 20:41:20 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 17 Oct 2016 20:41:20 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwEif-0000TU-Cp; Mon, 17 Oct 2016 20:41:13 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwEid-0000TC-KJ for mirageos-devel@lists.xenproject.org; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 47291 invoked from network); 17 Oct 2016 20:41:10 -0000 Received: from mail6.webfaction.com (HELO smtp.webfaction.com) (74.55.86.74) by server-7.tower-27.messagelabs.com with DHE-RSA-AES256-SHA encrypted SMTP; 17 Oct 2016 20:41:10 -0000 Received: from [192.168.5.177] (89-164-107-225.dsl.iskon.hr [89.164.107.225]) by smtp.webfaction.com (Postfix) with ESMTP id CFF1420A70EF; Mon, 17 Oct 2016 20:41:07 +0000 (UTC) Date: Mon, 17 Oct 2016 22:41:05 +0200 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: Ashish Agarwal Message-ID: <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: "=?utf-8?Q?mirageos-devel=40lists.xenproject.org?=" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 47291 invoked from network); 17 Oct 2016 20:41:10 -0000 Received: from mail6.webfaction.com (HELO smtp.webfaction.com) (74.55.86.74) by server-7.tower-27.messagelabs.com with DHE-RSA-AES256-SHA encrypted SMTP; 17 Oct 2016 20:41:10 -0000 Received: from [192.168.5.177] (89-164-107-225.dsl.iskon.hr [89.164.107.225]) by smtp.webfaction.com (Postfix) with ESMTP id CFF1420A70EF; Mon, 17 Oct 2016 20:41:07 +0000 (UTC) Date: Mon, 17 Oct 2016 22:41:05 +0200 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: Ashish Agarwal Message-ID: <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: "=?utf-8?Q?mirageos-devel=40lists.xenproject.org?=" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 21593 invoked from network); 17 Oct 2016 20:49:49 -0000 Received: from mail-qk0-f174.google.com (HELO mail-qk0-f174.google.com) (209.85.220.174) by server-12.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 17 Oct 2016 20:49:49 -0000 Received: by mail-qk0-f174.google.com with SMTP id f128so246673641qkb.1 for ; Mon, 17 Oct 2016 13:49:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=FRkksactzUU0wPRy3QJIcIx33QKYONR/mJKTs+kHVB8=; b=Emi6pXnjHt9myuPUuHxddr2a8jUEnMXzdrxdMpe0V8ZfPluOBNPUXSeLDUEyNbcCf5 /USGfkYINshEOMeMnBK/qcg0wZQFGzsJ1R6P09oomJBEecKgWI7HH+jfmdDecKJ+J6v0 eUEL2/eDzlvzMPfc7eO1WPwq4hLsVEnpy2VKkTK/Updsc6IHiUk0uoviCAWjNUBmEgQN fUaDMgVEndrrZwFQbe5QMllaJ2OlKwLEQt7F0NEOlFtidWdBtiXdbfGt8AE5lWrZu+YL SoJ4h3xkwkVmJT8Qnmi+re1udtO5GffPjtctyOj6YbftJIHyivk5liM9dbih5X7BsIbz lrbQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=FRkksactzUU0wPRy3QJIcIx33QKYONR/mJKTs+kHVB8=; b=DJ2wJyDHp4Vqtwc9hXPtC64vN+6DGZQ7MyFO+3tnLvuiczZMZLbZHMw2O/H8K9Ycli oi3TUuQtYLqFJGNV39s2i/BRAnbZmQrsK/2xTl6VT6umDfM2qPiEvjDoojq0liD2gJfN qN44qRU/QHsdO3KuVdF8dJv0luGA2CiBAXRAZaLYiRP5pFgw/mjQK4FEguEPKuo/i9+T 8T5xQ0SHjpcVUFZj86KQfoHXgw4qlE7ir/tBNeFjBVwH9li00roFg/kSAUrhHFQUTRvs XSaC8Dkw/+PtVcEG2rAOjQqsEPzm/9A9bWUQVpYYgzseUxgIj7dTMXlMVMhGbtxp+csb H3fg== X-Gm-Message-State: AA6/9RlCoJXxJdeahaj8DrckHZCZqBPK8vFODey8++j8IPD6QyLsAShuXDg8EK5mmctcTmSOTbjqf7GT1WzzWg== X-Received: by 10.55.170.83 with SMTP id t80mr25227311qke.15.1476737388391; Mon, 17 Oct 2016 13:49:48 -0700 (PDT) MIME-Version: 1.0 Received: by 10.55.185.7 with HTTP; Mon, 17 Oct 2016 13:49:27 -0700 (PDT) In-Reply-To: <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> From: Ashish Agarwal Date: Mon, 17 Oct 2016 16:49:27 -0400 Message-ID: To: =?UTF-8?Q?Daniel_B=C3=BCnzli?= Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5203614077184669046==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============5203614077184669046== Content-Type: multipart/alternative; boundary=001a114d41c87642d4053f15b7cb --001a114d41c87642d4053f15b7cb Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Mon, Oct 17, 2016 at 4:41 PM, Daniel B=C3=BCnzli wrote: As I said, monadic join. > I wasn't sure if that would cover the patterns that arise. Perhaps it does= . propagated to more generic error data types to the top level or to a > logging point. That's an interesting proposal. So you throw away the precision at some point. It seems a shame, but maybe that's good enough to get most of the value. In my own code, it's not clear to me at what points I would convert= specific errors to more general ones, but I'll keep this in mind and see i= f it could work. Thanks for the idea. --001a114d41c87642d4053f15b7cb Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On = Mon, Oct 17, 2016 at 4:41 PM, Daniel B=C3=BCnzli <daniel.buenz= li@erratique.ch> wrote:

As I said, monadic join.

I wasn= 't sure if that would cover the patterns that arise. Perhaps it does.<= /div>


propaga= ted to more generic error data types to the top level or to a logging poin= t.

That's an interesting proposal. So = you throw away the precision at some point. It seems a shame, but maybe th= at's good enough to get most of the value. In my own code, it's no= t clear to me at what points I would convert specific errors to more gener= al ones, but I'll keep this in mind and see if it could work. Thanks f= or the idea.


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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=FRkksactzUU0wPRy3QJIcIx33QKYONR/mJKTs+kHVB8=; b=DJ2wJyDHp4Vqtwc9hXPtC64vN+6DGZQ7MyFO+3tnLvuiczZMZLbZHMw2O/H8K9Ycli oi3TUuQtYLqFJGNV39s2i/BRAnbZmQrsK/2xTl6VT6umDfM2qPiEvjDoojq0liD2gJfN qN44qRU/QHsdO3KuVdF8dJv0luGA2CiBAXRAZaLYiRP5pFgw/mjQK4FEguEPKuo/i9+T 8T5xQ0SHjpcVUFZj86KQfoHXgw4qlE7ir/tBNeFjBVwH9li00roFg/kSAUrhHFQUTRvs XSaC8Dkw/+PtVcEG2rAOjQqsEPzm/9A9bWUQVpYYgzseUxgIj7dTMXlMVMhGbtxp+csb H3fg== X-Gm-Message-State: AA6/9RlCoJXxJdeahaj8DrckHZCZqBPK8vFODey8++j8IPD6QyLsAShuXDg8EK5mmctcTmSOTbjqf7GT1WzzWg== X-Received: by 10.55.170.83 with SMTP id t80mr25227311qke.15.1476737388391; Mon, 17 Oct 2016 13:49:48 -0700 (PDT) MIME-Version: 1.0 Received: by 10.55.185.7 with HTTP; Mon, 17 Oct 2016 13:49:27 -0700 (PDT) In-Reply-To: <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> From: Ashish Agarwal Date: Mon, 17 Oct 2016 16:49:27 -0400 Message-ID: To: =?UTF-8?Q?Daniel_B=C3=BCnzli?= Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5203614077184669046==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============5203614077184669046== Content-Type: multipart/alternative; boundary=001a114d41c87642d4053f15b7cb --001a114d41c87642d4053f15b7cb Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Mon, Oct 17, 2016 at 4:41 PM, Daniel B=C3=BCnzli wrote: As I said, monadic join. > I wasn't sure if that would cover the patterns that arise. Perhaps it does= . propagated to more generic error data types to the top level or to a > logging point. That's an interesting proposal. So you throw away the precision at some point. It seems a shame, but maybe that's good enough to get most of the value. In my own code, it's not clear to me at what points I would convert= specific errors to more general ones, but I'll keep this in mind and see i= f it could work. Thanks for the idea. --001a114d41c87642d4053f15b7cb Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On = Mon, Oct 17, 2016 at 4:41 PM, Daniel B=C3=BCnzli <daniel.buenz= li@erratique.ch> wrote:

As I said, monadic join.

I wasn= 't sure if that would cover the patterns that arise. Perhaps it does.<= /div>


propaga= ted to more generic error data types to the top level or to a logging poin= t.

That's an interesting proposal. So = you throw away the precision at some point. It seems a shame, but maybe th= at's good enough to get most of the value. In my own code, it's no= t clear to me at what points I would convert specific errors to more gener= al ones, but I'll keep this in mind and see if it could work. Thanks f= or the idea.


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banners=-,-,- X-VirusChecked: Checked Received: (qmail 10130 invoked from network); 18 Oct 2016 08:38:28 -0000 Received: from mail6.webfaction.com (HELO smtp.webfaction.com) (74.55.86.74) by server-4.tower-27.messagelabs.com with DHE-RSA-AES256-SHA encrypted SMTP; 18 Oct 2016 08:38:28 -0000 Received: from [192.168.5.177] (157-149.dsl.iskon.hr [89.164.157.149]) by smtp.webfaction.com (Postfix) with ESMTP id 922EE20CA861; Tue, 18 Oct 2016 08:38:26 +0000 (UTC) Date: Tue, 18 Oct 2016 10:38:24 +0200 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: Ashish Agarwal Message-ID: In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: "=?utf-8?Q?mirageos-devel=40lists.xenproject.org?=" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 10130 invoked from network); 18 Oct 2016 08:38:28 -0000 Received: from mail6.webfaction.com (HELO smtp.webfaction.com) (74.55.86.74) by server-4.tower-27.messagelabs.com with DHE-RSA-AES256-SHA encrypted SMTP; 18 Oct 2016 08:38:28 -0000 Received: from [192.168.5.177] (157-149.dsl.iskon.hr [89.164.157.149]) by smtp.webfaction.com (Postfix) with ESMTP id 922EE20CA861; Tue, 18 Oct 2016 08:38:26 +0000 (UTC) Date: Tue, 18 Oct 2016 10:38:24 +0200 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: Ashish Agarwal Message-ID: In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: "=?utf-8?Q?mirageos-devel=40lists.xenproject.org?=" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 58019 invoked from network); 18 Oct 2016 13:24:31 -0000 Received: from mail-qt0-f169.google.com (HELO mail-qt0-f169.google.com) (209.85.216.169) by server-8.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 18 Oct 2016 13:24:31 -0000 Received: by mail-qt0-f169.google.com with SMTP id q7so155946179qtq.1 for ; Tue, 18 Oct 2016 06:24:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=Ctb7tnzbr0VGjs47Ks/zt5GLUBV1cUS+n66aJ4lnK8w=; b=KpYwh0PYmyZ3EP3h1XF0Ow8QDJkN2ztlyuEEl6nBjY5Do16/0pN0aJi9mKys21irhR JTgZjLKw5zvLopXJcbbg0rGJ+LHm//H+2LkKGOywrwBJJKjrTWzKRiUE3kuSzKgz6sg8 JSdADIoM3csJRtjVYL/QM33BZXxHF0GJaPGgLN6Y8atGm9GYdUEr5aSzqpgkdsUleVNR uluW2HwQxXSOsn8a0qBjhK8QqaiYHxFD9iNgmhq46M8Mfs9LYhlsfBzan2FrqeLo1NlL RKAaPrQWRqmemn0PzQkFUI+2vj9p0HOSFyAs1FuDjG+GQ4lVUMVNh+os07MPIu39sA1S fYJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=Ctb7tnzbr0VGjs47Ks/zt5GLUBV1cUS+n66aJ4lnK8w=; b=StIboVF78RiyQCFNQepQwi3AWhdHnMFMpUPZ9Le3Y6B75VhDYPU1J1wyZDbS5mCo4r QLLKG1TsEo7Ohj27rEooyjnlfOeRHN9W/NZsugqYApuger262o0M6AY+ItuOdrKSX/O7 qQfTUNg7Iqd2PiNnjJ4NpnHlWQofLNCOZqHOYEWamiuP/Ji0EEmx1cOvEHXh27j6WaQE xdiyGoPmnw9lgO39Aj4gHCvz+UiIXDThZcPLxEr+el5JuK/fOqTxSZImsTVO/VR1C5Iw +xocMXm9ZDWa7NEzqyKHOwDIQKttkHAzelzFSEdguu5rBNTpXimJcfSDcXxBYbIKaL4e ZTBw== X-Gm-Message-State: AA6/9RnAIiuPWXiQuXQUHE6F1D1CvQlQRwLy1/iVLthLuLauolUlCHba7x0WIuggRgaL4lm3gVccWEjMtbfCWQ== X-Received: by 10.200.33.201 with SMTP id 9mr459821qtz.141.1476797070903; Tue, 18 Oct 2016 06:24:30 -0700 (PDT) MIME-Version: 1.0 Received: by 10.55.185.7 with HTTP; Tue, 18 Oct 2016 06:24:10 -0700 (PDT) In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> From: Ashish Agarwal Date: Tue, 18 Oct 2016 09:24:10 -0400 Message-ID: To: =?UTF-8?Q?Daniel_B=C3=BCnzli?= Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============0720139159970398419==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============0720139159970398419== Content-Type: multipart/alternative; boundary=001a11403834d11650053f239c18 --001a11403834d11650053f239c18 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Tue, Oct 18, 2016 at 4:38 AM, Daniel B=C3=BCnzli wrote: I think you should transform your errors according to your level of > abstraction as much as you do with your values. That's a good goal. > Also using inclusion (by tagging an error subset) rather than union for > errors reported by subsystems allows you to work with a constant set of > variants at a given abstraction level which lessens the problems. > I've tried that, and only problem was I ended up with rather big types. Appropriate naming could get around that, at least in the mli's. Crazy types might still get printed out by utop, but that doesn't bother me too much. --001a11403834d11650053f239c18 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On T= ue, Oct 18, 2016 at 4:38 AM, Daniel B=C3=BCnzli <daniel.buenzli@= erratique.ch> wrote:

I think you should transform your errors according to your level of = abstraction as much as you do with your values.

=
That's a good goal.
=C2=A0
Also using inclusion (by tagging an error subset) rather than union= for errors reported by subsystems allows you to work with a constant set o= f variants at a given abstraction level which lessens the problems.

I've tried that, and only problem was I en= ded up with rather big types. Appropriate naming could get around that, at = least in the mli's. Crazy types might still get printed out by utop, bu= t that doesn't bother me too much.

--001a11403834d11650053f239c18-- --===============0720139159970398419== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============0720139159970398419==-- From mirageos-devel-bounces@lists.xenproject.org Tue Oct 18 13:24:41 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 18 Oct 2016 13:24:41 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwUNe-0001sm-E7; Tue, 18 Oct 2016 13:24:34 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwUNd-0001sg-Kg for mirageos-devel@lists.xenproject.org; Tue, 18 Oct 2016 13:24:33 +0000 Received: from [85.158.137.68] by server-5.bemta-3.messagelabs.com id 00/A1-01171-09226085; Tue, 18 Oct 2016 13:24:32 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrJIsWRWlGSWpSXmKPExsVyMfTGSt0JSmw RBsvFLHpb77I4MHoc/nCFJYAxijUzLym/IoE1Y9FVk4I5ghVbP01hbWD8xdfFyMUhJDCPUWLv 45PsIA6LQAOrxJ1vVxm7GDk5JATmsEpcPCoIYedIPGptZoawCyQe/5rEAmLzCghKnJz5BMwWE vCU+HvjO1sXIwcHp4CNxIdrFRALutgknq7cywpSwyagI3Fo3iV2EJtFQFWic85eJog5ARK9rR 1gtjDQnA3Td4HViwg4SNw/Ow9sJrOAv8Te7eUgYWYBL4mFv04xTmAUmIXkillIUrPAOtQl1s8 TgghrSyxb+JoZwlaTuL3tKjuy+AJGtlWMGsWpRWWpRbqGhnpJRZnpGSW5iZk5uoYGxnq5qcXF iempOYlJxXrJ+bmbGIEBzgAEOxhX/3Y6xCjJwaQkyvvoMWuEEF9SfkplRmJxRnxRaU5q8SFGG Q4OJQleUUW2CCHBotT01Iq0zBxgrMGkJTh4lER4eUDSvMUFibnFmekQqVOMxhxbfl9by8Sxbe q9tUxCLHn5ealS4rxqIKUCIKUZpXlwg2Ap4BKjrJQwLyPQaUI8BalFuZklqPKvGMU5GJWEeRe ATOHJzCuB2/cK6BQmoFPO5bGAnFKSiJCSamCcuHO5w8urq9d52zZPaJQw7HK9XiJTs/Sj8fLH dpsar7ZO0g6JjE829GBe2xXzu4Zb8LXF2YVallWrV34p3P/g3tyt0fWbp/DENH+p1OScWnvUZ rG4h+HVWJFki8d/utyUr+X3JntvT+JN/3k/RMKAY1GhT1GSmvf+GlOzH09OVlecYN/37KwSS3 FGoqEWc1FxIgDYIuYK/AIAAA== X-Env-Sender: agarwal1975@gmail.com X-Msg-Ref: server-8.tower-31.messagelabs.com!1476797071!66808132!1 X-Originating-IP: [209.85.216.169] X-SpamReason: No, hits=1.4 required=7.0 tests=BODY_RANDOM_LONG, HTML_40_50,HTML_MESSAGE,RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 8.84; banners=-,-,- X-VirusChecked: Checked Received: (qmail 58019 invoked from network); 18 Oct 2016 13:24:31 -0000 Received: from mail-qt0-f169.google.com (HELO mail-qt0-f169.google.com) (209.85.216.169) by server-8.tower-31.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 18 Oct 2016 13:24:31 -0000 Received: by mail-qt0-f169.google.com with SMTP id q7so155946179qtq.1 for ; Tue, 18 Oct 2016 06:24:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=Ctb7tnzbr0VGjs47Ks/zt5GLUBV1cUS+n66aJ4lnK8w=; b=KpYwh0PYmyZ3EP3h1XF0Ow8QDJkN2ztlyuEEl6nBjY5Do16/0pN0aJi9mKys21irhR JTgZjLKw5zvLopXJcbbg0rGJ+LHm//H+2LkKGOywrwBJJKjrTWzKRiUE3kuSzKgz6sg8 JSdADIoM3csJRtjVYL/QM33BZXxHF0GJaPGgLN6Y8atGm9GYdUEr5aSzqpgkdsUleVNR uluW2HwQxXSOsn8a0qBjhK8QqaiYHxFD9iNgmhq46M8Mfs9LYhlsfBzan2FrqeLo1NlL RKAaPrQWRqmemn0PzQkFUI+2vj9p0HOSFyAs1FuDjG+GQ4lVUMVNh+os07MPIu39sA1S fYJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=Ctb7tnzbr0VGjs47Ks/zt5GLUBV1cUS+n66aJ4lnK8w=; b=StIboVF78RiyQCFNQepQwi3AWhdHnMFMpUPZ9Le3Y6B75VhDYPU1J1wyZDbS5mCo4r QLLKG1TsEo7Ohj27rEooyjnlfOeRHN9W/NZsugqYApuger262o0M6AY+ItuOdrKSX/O7 qQfTUNg7Iqd2PiNnjJ4NpnHlWQofLNCOZqHOYEWamiuP/Ji0EEmx1cOvEHXh27j6WaQE xdiyGoPmnw9lgO39Aj4gHCvz+UiIXDThZcPLxEr+el5JuK/fOqTxSZImsTVO/VR1C5Iw +xocMXm9ZDWa7NEzqyKHOwDIQKttkHAzelzFSEdguu5rBNTpXimJcfSDcXxBYbIKaL4e ZTBw== X-Gm-Message-State: AA6/9RnAIiuPWXiQuXQUHE6F1D1CvQlQRwLy1/iVLthLuLauolUlCHba7x0WIuggRgaL4lm3gVccWEjMtbfCWQ== X-Received: by 10.200.33.201 with SMTP id 9mr459821qtz.141.1476797070903; Tue, 18 Oct 2016 06:24:30 -0700 (PDT) MIME-Version: 1.0 Received: by 10.55.185.7 with HTTP; Tue, 18 Oct 2016 06:24:10 -0700 (PDT) In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> From: Ashish Agarwal Date: Tue, 18 Oct 2016 09:24:10 -0400 Message-ID: To: =?UTF-8?Q?Daniel_B=C3=BCnzli?= Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============0720139159970398419==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============0720139159970398419== Content-Type: multipart/alternative; boundary=001a11403834d11650053f239c18 --001a11403834d11650053f239c18 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On Tue, Oct 18, 2016 at 4:38 AM, Daniel B=C3=BCnzli wrote: I think you should transform your errors according to your level of > abstraction as much as you do with your values. That's a good goal. > Also using inclusion (by tagging an error subset) rather than union for > errors reported by subsystems allows you to work with a constant set of > variants at a given abstraction level which lessens the problems. > I've tried that, and only problem was I ended up with rather big types. Appropriate naming could get around that, at least in the mli's. Crazy types might still get printed out by utop, but that doesn't bother me too much. --001a11403834d11650053f239c18 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On T= ue, Oct 18, 2016 at 4:38 AM, Daniel B=C3=BCnzli <daniel.buenzli@= erratique.ch> wrote:

I think you should transform your errors according to your level of = abstraction as much as you do with your values.

=
That's a good goal.
=C2=A0
Also using inclusion (by tagging an error subset) rather than union= for errors reported by subsystems allows you to work with a constant set o= f variants at a given abstraction level which lessens the problems.

I've tried that, and only problem was I en= ded up with rather big types. Appropriate naming could get around that, at = least in the mli's. Crazy types might still get printed out by utop, bu= t that doesn't bother me too much.

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[209.85.161.177]) by smtp.gmail.com with ESMTPSA id t142sm4682572ywe.12.2016.10.18.06.41.30 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 18 Oct 2016 06:41:30 -0700 (PDT) Received: by mail-yw0-f177.google.com with SMTP id u124so137956663ywg.3 for ; Tue, 18 Oct 2016 06:41:30 -0700 (PDT) X-Received: by 10.13.198.71 with SMTP id i68mr600387ywd.167.1476798089904; Tue, 18 Oct 2016 06:41:29 -0700 (PDT) MIME-Version: 1.0 Received: by 10.129.161.16 with HTTP; Tue, 18 Oct 2016 06:41:28 -0700 (PDT) In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> From: Richard Mortier Date: Tue, 18 Oct 2016 14:41:28 +0100 X-Gmail-Original-Message-ID: Message-ID: To: Ashish Agarwal Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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[209.85.161.177]) by smtp.gmail.com with ESMTPSA id t142sm4682572ywe.12.2016.10.18.06.41.30 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 18 Oct 2016 06:41:30 -0700 (PDT) Received: by mail-yw0-f177.google.com with SMTP id u124so137956663ywg.3 for ; Tue, 18 Oct 2016 06:41:30 -0700 (PDT) X-Received: by 10.13.198.71 with SMTP id i68mr600387ywd.167.1476798089904; Tue, 18 Oct 2016 06:41:29 -0700 (PDT) MIME-Version: 1.0 Received: by 10.129.161.16 with HTTP; Tue, 18 Oct 2016 06:41:28 -0700 (PDT) In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> From: Richard Mortier Date: Tue, 18 Oct 2016 14:41:28 +0100 X-Gmail-Original-Message-ID: Message-ID: To: Ashish Agarwal Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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Tue, 18 Oct 2016 14:49:43 +0100 (BST) From: Anil Madhavapeddy Date: Tue, 18 Oct 2016 14:49:41 +0100 Message-Id: <4837AFAF-98EE-4A3D-983F-010EC81DF923@recoil.org> To: mirageos-devel Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) X-Mailer: Apple Mail (2.3124) Cc: takayuki.imada@gmail.com Subject: [MirageOS-devel] [cambridge] welcome Takayuki Imada X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" RGVhciBNaXJhZ2VycywKCkknZCBsaWtlIHRvIGludHJvZHVjZSBUYWtheXVraSBJbWFkYSwgd2hv IGlzIGpvaW5pbmcgdGhlIENhbWJyaWRnZSBDb21wdXRlciBMYWIgdGhpcyB3ZWVrIGFzIGEgdmlz aXRvciBmb3IgYSB5ZWFyLWxvbmcgc2FiYmF0aWNhbCBmcm9tIEhpdGFjaGkgaW4gSmFwYW4uCgpU YWtheXVraSBkZXNjcmliZXMgaGltc2VsZiBhcyBhICJzb2Z0d2FyZSB2aXJ0dWFsaXNhdGlvbiBn dXkiIGFuZCB0aGUgZ29hbCBvZiBoaXMgc2FiYmF0aWNhbCBpcyB0byBleHBlcmltZW50IHdpdGgg dmFyaW91cyBwbGF0Zm9ybXMgZm9yIGludGVncmF0aW5nIHVuaWtlcm5lbCB0ZWNoLCBhbmQgcGFy dGljdWxhcmx5IE1pcmFnZU9TLCBpbnRvIG5ldHdvcmsgZGV2aWNlcyAoaW5jbHVkaW5nIEFSTSBh cyB3ZWxsIGFzIHg4NikuCgpBcyBwYXJ0IG9mIHRoaXMsIGhlIHdpbGwgdGFraW5nIGEgY2xvc2Ug bG9vayBhdCB0aGUgTWlyYWdlIG5ldHdvcmtpbmcgc3Vic3lzdGVtIGFuZCBob3cgdGVjaG5vbG9n aWVzIHN1Y2ggYXMgU1ItSU9WIHBhc3N0aHJvdWdoIGNhbiBsaW5rIHVwIHdpdGggdGhlIHZhcmlv dXMgTWlyYWdlIGJhY2tlbmRzIChzdWNoIGFzIFhlbiB3aGVyZSBoYXJkd2FyZSBwYXNzdGhyb3Vn aCBpcyByZWxhdGl2ZWx5IG1hdHVyZSwgYW5kIG5ld2VyIGJhY2tlbmRzIHN1Y2ggYXMgU29sbzUg d2hlcmUgc29tZSB3b3JrIG5lZWRzIHRvIGhhcHBlbiBvbiBMaW51eCBLVk0gYW5kIEZyZWVCU0Qg Zm9yIGVxdWl2YWxlbnQgZnVuY3Rpb25hbGl0eSkuIAoKSGlzIGZpcnN0IHN0ZXAgaXMgc3RhcnRp bmcgdG8gbGVhcm4gT0NhbWwsIGFuZCBoZSBhdHRlbmRlZCB0aGUgSUNGUCB0dXRvcmlhbCB0aGF0 IE1pbmR5IGFuZCBHZW1tYSByYW4gcmVjZW50bHkuICBIZSBpcyBub3cgdXNpbmcgUmVhbCBXb3Js ZCBPQ2FtbCBhcyBoaXMgcmVmZXJlbmNlIHRleHQsIHNvIHBsZWFzZSBkbyBhc3Npc3QgaGltIHdp dGggYW55IHF1ZXN0aW9ucyBoZSBtaWdodCBoYXZlIHdoaWxlIHdlIHBsdWcgdGhlIGRvY3VtZW50 YXRpb24gZ2FwcyBpbiBNaXJhZ2UzLiAgSWYgeW91J3JlIGEgbmV0d29yayBoYWNrZXIgKG9yIG90 aGVyd2lzZSEpIGZlZWwgZnJlZSB0byBmaW5kIGhpbSBpbiB0aGUgQ1VDTCBpbiBGVzAxLgoKV2Vs Y29tZSBUYWtheXVraSEKCnJlZ2FyZHMKQW5pbAoKX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1MtZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9T LWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcv Y2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFnZW9zLWRldmVsCg== From mirageos-devel-bounces@lists.xenproject.org Tue Oct 18 13:49:47 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 18 Oct 2016 13:49:47 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwUm3-0003KY-4m; 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Tue, 18 Oct 2016 14:49:43 +0100 (BST) From: Anil Madhavapeddy Date: Tue, 18 Oct 2016 14:49:41 +0100 Message-Id: <4837AFAF-98EE-4A3D-983F-010EC81DF923@recoil.org> To: mirageos-devel Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) X-Mailer: Apple Mail (2.3124) Cc: takayuki.imada@gmail.com Subject: [MirageOS-devel] [cambridge] welcome Takayuki Imada X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" RGVhciBNaXJhZ2VycywKCkknZCBsaWtlIHRvIGludHJvZHVjZSBUYWtheXVraSBJbWFkYSwgd2hv IGlzIGpvaW5pbmcgdGhlIENhbWJyaWRnZSBDb21wdXRlciBMYWIgdGhpcyB3ZWVrIGFzIGEgdmlz aXRvciBmb3IgYSB5ZWFyLWxvbmcgc2FiYmF0aWNhbCBmcm9tIEhpdGFjaGkgaW4gSmFwYW4uCgpU YWtheXVraSBkZXNjcmliZXMgaGltc2VsZiBhcyBhICJzb2Z0d2FyZSB2aXJ0dWFsaXNhdGlvbiBn dXkiIGFuZCB0aGUgZ29hbCBvZiBoaXMgc2FiYmF0aWNhbCBpcyB0byBleHBlcmltZW50IHdpdGgg dmFyaW91cyBwbGF0Zm9ybXMgZm9yIGludGVncmF0aW5nIHVuaWtlcm5lbCB0ZWNoLCBhbmQgcGFy dGljdWxhcmx5IE1pcmFnZU9TLCBpbnRvIG5ldHdvcmsgZGV2aWNlcyAoaW5jbHVkaW5nIEFSTSBh cyB3ZWxsIGFzIHg4NikuCgpBcyBwYXJ0IG9mIHRoaXMsIGhlIHdpbGwgdGFraW5nIGEgY2xvc2Ug bG9vayBhdCB0aGUgTWlyYWdlIG5ldHdvcmtpbmcgc3Vic3lzdGVtIGFuZCBob3cgdGVjaG5vbG9n aWVzIHN1Y2ggYXMgU1ItSU9WIHBhc3N0aHJvdWdoIGNhbiBsaW5rIHVwIHdpdGggdGhlIHZhcmlv dXMgTWlyYWdlIGJhY2tlbmRzIChzdWNoIGFzIFhlbiB3aGVyZSBoYXJkd2FyZSBwYXNzdGhyb3Vn aCBpcyByZWxhdGl2ZWx5IG1hdHVyZSwgYW5kIG5ld2VyIGJhY2tlbmRzIHN1Y2ggYXMgU29sbzUg d2hlcmUgc29tZSB3b3JrIG5lZWRzIHRvIGhhcHBlbiBvbiBMaW51eCBLVk0gYW5kIEZyZWVCU0Qg Zm9yIGVxdWl2YWxlbnQgZnVuY3Rpb25hbGl0eSkuIAoKSGlzIGZpcnN0IHN0ZXAgaXMgc3RhcnRp bmcgdG8gbGVhcm4gT0NhbWwsIGFuZCBoZSBhdHRlbmRlZCB0aGUgSUNGUCB0dXRvcmlhbCB0aGF0 IE1pbmR5IGFuZCBHZW1tYSByYW4gcmVjZW50bHkuICBIZSBpcyBub3cgdXNpbmcgUmVhbCBXb3Js ZCBPQ2FtbCBhcyBoaXMgcmVmZXJlbmNlIHRleHQsIHNvIHBsZWFzZSBkbyBhc3Npc3QgaGltIHdp dGggYW55IHF1ZXN0aW9ucyBoZSBtaWdodCBoYXZlIHdoaWxlIHdlIHBsdWcgdGhlIGRvY3VtZW50 YXRpb24gZ2FwcyBpbiBNaXJhZ2UzLiAgSWYgeW91J3JlIGEgbmV0d29yayBoYWNrZXIgKG9yIG90 aGVyd2lzZSEpIGZlZWwgZnJlZSB0byBmaW5kIGhpbSBpbiB0aGUgQ1VDTCBpbiBGVzAxLgoKV2Vs Y29tZSBUYWtheXVraSEKCnJlZ2FyZHMKQW5pbAoKX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1MtZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9T LWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcv Y2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFnZW9zLWRldmVsCg== From mirageos-devel-bounces@lists.xenproject.org Tue Oct 18 14:00:15 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 18 Oct 2016 14:00:15 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwUw8-0004l3-QO; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 48796 invoked from network); 18 Oct 2016 14:00:09 -0000 Received: from mail6.webfaction.com (HELO smtp.webfaction.com) (74.55.86.74) by server-14.tower-206.messagelabs.com with DHE-RSA-AES256-SHA encrypted SMTP; 18 Oct 2016 14:00:09 -0000 Received: from [192.168.5.177] (157-149.dsl.iskon.hr [89.164.157.149]) by smtp.webfaction.com (Postfix) with ESMTP id 54AFD214FEA6; Tue, 18 Oct 2016 14:00:06 +0000 (UTC) Date: Tue, 18 Oct 2016 16:00:05 +0200 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: Richard Mortier Message-ID: <065753F4BEA14E95AF635472A302085F@erratique.ch> In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: "=?utf-8?Q?mirageos-devel=40lists.xenproject.org?=" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 48796 invoked from network); 18 Oct 2016 14:00:09 -0000 Received: from mail6.webfaction.com (HELO smtp.webfaction.com) (74.55.86.74) by server-14.tower-206.messagelabs.com with DHE-RSA-AES256-SHA encrypted SMTP; 18 Oct 2016 14:00:09 -0000 Received: from [192.168.5.177] (157-149.dsl.iskon.hr [89.164.157.149]) by smtp.webfaction.com (Postfix) with ESMTP id 54AFD214FEA6; Tue, 18 Oct 2016 14:00:06 +0000 (UTC) Date: Tue, 18 Oct 2016 16:00:05 +0200 From: =?utf-8?Q?Daniel_B=C3=BCnzli?= To: Richard Mortier Message-ID: <065753F4BEA14E95AF635472A302085F@erratique.ch> In-Reply-To: References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> X-Mailer: sparrow 1.6.4 (build 1178) MIME-Version: 1.0 Content-Disposition: inline Cc: "=?utf-8?Q?mirageos-devel=40lists.xenproject.org?=" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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[209.85.213.179]) by smtp.gmail.com with ESMTPSA id 204sm13744428yww.9.2016.10.18.07.01.27 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 18 Oct 2016 07:01:27 -0700 (PDT) Received: by mail-yb0-f179.google.com with SMTP id 191so77091680ybv.3 for ; Tue, 18 Oct 2016 07:01:27 -0700 (PDT) X-Received: by 10.37.43.73 with SMTP id r70mr663031ybr.86.1476799287058; Tue, 18 Oct 2016 07:01:27 -0700 (PDT) MIME-Version: 1.0 Received: by 10.129.161.16 with HTTP; Tue, 18 Oct 2016 07:01:25 -0700 (PDT) In-Reply-To: <065753F4BEA14E95AF635472A302085F@erratique.ch> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> <065753F4BEA14E95AF635472A302085F@erratique.ch> From: Richard Mortier Date: Tue, 18 Oct 2016 15:01:25 +0100 X-Gmail-Original-Message-ID: Message-ID: To: =?UTF-8?Q?Daniel_B=C3=BCnzli?= Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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[209.85.213.179]) by smtp.gmail.com with ESMTPSA id 204sm13744428yww.9.2016.10.18.07.01.27 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 18 Oct 2016 07:01:27 -0700 (PDT) Received: by mail-yb0-f179.google.com with SMTP id 191so77091680ybv.3 for ; Tue, 18 Oct 2016 07:01:27 -0700 (PDT) X-Received: by 10.37.43.73 with SMTP id r70mr663031ybr.86.1476799287058; Tue, 18 Oct 2016 07:01:27 -0700 (PDT) MIME-Version: 1.0 Received: by 10.129.161.16 with HTTP; Tue, 18 Oct 2016 07:01:25 -0700 (PDT) In-Reply-To: <065753F4BEA14E95AF635472A302085F@erratique.ch> References: <8838630A-C831-4B54-A02B-B9061D28C382@recoil.org> <7a2db963-03d4-4404-53b4-2826a93b8d52@mehnert.org> <55B5C72C-93A9-462D-BAB9-35476BB07368@recoil.org> <55A44E1BEB344E01B12CA2C31EEACC9F@erratique.ch> <5F9EEA2C65FB453F9CC15004126822D2@erratique.ch> <065753F4BEA14E95AF635472A302085F@erratique.ch> From: Richard Mortier Date: Tue, 18 Oct 2016 15:01:25 +0100 X-Gmail-Original-Message-ID: Message-ID: To: =?UTF-8?Q?Daniel_B=C3=BCnzli?= Cc: "mirageos-devel@lists.xenproject.org" Subject: Re: [MirageOS-devel] Using Result instead of Option in libraries X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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q=dns; s= selector1; b=qj9iKo02Mio/q5u48nhgzrl+8dW+ope9qsFjP/pLT3qeXgi3dlQ fTEtQuMQRROVASy0EuXnZaXabXPIInMVOjZFgW9J3MN5vNwJp8I31fi3Dz8zWzQF LLvR4hxWV8eNyrnowl/GphViIybZYag/GdXBJOo6cneLnlvxGUH80kbc= Received: from [172.16.10.191] (mail.astons-coaches.co.uk [194.72.166.2]) by bark.recoil.org (OpenSMTPD) with ESMTPSA id db4a75fd (TLSv1:ECDHE-RSA-AES256-SHA:256:NO); Tue, 18 Oct 2016 16:08:54 +0100 (BST) Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Anil Madhavapeddy In-Reply-To: <135c2cd3-9577-e400-f1ba-bd3f91ace472@gmail.com> Date: Tue, 18 Oct 2016 16:08:53 +0100 Message-Id: References: <4837AFAF-98EE-4A3D-983F-010EC81DF923@recoil.org> <135c2cd3-9577-e400-f1ba-bd3f91ace472@gmail.com> To: Nick Betteridge X-Mailer: Apple Mail (2.3124) Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] ARM experiences (was: [cambridge] welcome Takayuki Imada) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 45985 invoked from network); 18 Oct 2016 17:11:24 -0000 Received: from abts-kk-static-099.241.166.122.airtelbroadband.in (HELO fooobar.mooo.com) (122.166.241.99) by server-15.tower-21.messagelabs.com with SMTP; 18 Oct 2016 17:11:24 -0000 Received: from [100.107.166.122] (unknown [27.107.105.158]) by fooobar.mooo.com (Postfix) with ESMTPSA id F297266635E; Wed, 19 Oct 2016 04:10:47 +0530 (IST) In-Reply-To: References: <4837AFAF-98EE-4A3D-983F-010EC81DF923@recoil.org> <135c2cd3-9577-e400-f1ba-bd3f91ace472@gmail.com> MIME-Version: 1.0 From: "Cherry G. Mathew" Date: Tue, 18 Oct 2016 17:11:08 +0000 To: Anil Madhavapeddy , Nick Betteridge Message-ID: Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] ARM experiences (was: [cambridge] welcome Takayuki Imada) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTggT2N0b2JlciAyMDE2IDg6Mzg6NTMgcG0gSVNULCBBbmlsIE1hZGhhdmFwZWRkeSA8YW5p bEByZWNvaWwub3JnPiB3cm90ZToKPk9uIDE4IE9jdCAyMDE2LCBhdCAxNjowMSwgTmljayBCZXR0 ZXJpZGdlCj48bGlzdHMubmljay5iZXR0ZXJpZGdlQGdtYWlsLmNvbT4gd3JvdGU6Cj4+IEl0IHdv dWxkIGJlIGdyZWF0LCBhIGxpdHRsZSBsYXRlciBkb3duIHRoZSByb2FkLCBpZiB3ZSBjb3VsZCBz ZXQgdXAgYQo+PiByZXBvc2l0b3J5LCBsaWtlIFNvbG81LCB3aGVyZSB3ZSBjYW4gYm90aCBsZWFy biBhbmQgY29udHJpYnV0ZSB0bwo+PiBhbnl0aGluZyBoYXJkd2FyZSByZWxhdGVkIC0gaW4gdGhl IGZvcm0gb2YgYm90aCBzbmlwcGV0cyBhbmQKPmRlbW9uc3RyYXRvcnMuCj4+IAo+PiBUaGUgZnV0 dXJlIGlzIGxvb2tpbmcgcm9zeSA6LSkKPgo+QWJzb2x1dGVseSAtIGl0J3MgY2xlYXIgZnJvbSB0 aGUgZWFybGllciB0aHJlYWQgb24gQVJNIHRoYXQgaGFyZHdhcmUKPmNvbnRpbnVlcyB0byBiZSBm cmFnbWVudGVkLCBhbmQgYnVpbGQgc3lzdGVtcyBjb250aW51ZSB0byBiZSBjb25mdXNpbmcKPndp dGggcmVzcGVjdCB0byBnZXR0aW5nIGJvb3RhYmxlIGltYWdlcy4KPgoKRldJVywgdGhlIG5ldGJz ZCBidWlsZCBzeXN0ZW0gc3RhbmRzIG91dCBpbiBhIHdvcmxkIG9mIG11Y2suCgpXZSd2ZSBqdXN0 IGZpbmlzaGVkIHJlb3JnYW5pc2luZywgdW5pdCB0ZXN0aW5nIGFuZCBidWlsZGluZyBhIGNyaXRp Y2FsIGtlcm5lbCBWTSBjb21wb25lbnQgaW4gdXNlcmxhbmQsIGZyb20gKndpbmRvd3MqCgotLSAK fmNoZXJyeQoKU2VudCB2aWEgcGhvbmUgZGV2aWNlLiBzb3JyeSBpdCdzIHNob3J0LgoKX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1MtZGV2ZWwg bWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8v bGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFnZW9zLWRl dmVsCg== From mirageos-devel-bounces@lists.xenproject.org Tue Oct 18 17:11:35 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 18 Oct 2016 17:11:35 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwXvD-0002Fo-Fe; Tue, 18 Oct 2016 17:11:27 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwXvC-0002Fi-H8 for mirageos-devel@lists.xenproject.org; Tue, 18 Oct 2016 17:11:26 +0000 Received: from [85.158.143.35] by server-8.bemta-6.messagelabs.com id 07/09-28497-DB756085; Tue, 18 Oct 2016 17:11:25 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprAIsWRWlGSWpSXmKPExsVStexjsu6ecLY IgyWn9C16W++yODB6HP5whSWAMYo1My8pvyKBNeP2/3fsBRfYKo4/bWNpYNzH2sXIxSEkMI9R 4sGND+xdjJwcnAJ2EvOfbwWzhQQWMErsPmIDYvMKCEqcnPmEBcRmFpCXaN46mxnC1pA4uuEGW FxYIFziTu9kMJsNKL708HqwGhYBVYk5HyYwdTFycIgIREo8++sA0aou8fV+AwvEeEuJ29M/ME 5g5JmFZNssJNtmIdm2gJF5FaN6cWpRWWqRrrFeUlFmekZJbmJmjq6hgZlebmpxcWJ6ak5iUrF ecn7uJkZg6DAAwQ7Gjn9OhxglOZiURHlbvdkihPiS8lMqMxKLM+KLSnNSiw8xynBwKEnwvgwD ygkWpaanVqRl5gCDGCYtwcGjJMKbApLmLS5IzC3OTIdInWLU5Vjw4/ZaJiGWvPy8VClx3iSQI gGQoozSPLgRsIi6xCgrJczLCHSUEE9BalFuZgmq/CtGcQ5GJWHeLyBTeDLzSuA2vQI6ggnoiH N5LCBHlCQipKQaGL08Cuy6bZXKvVoNvvu6/Hs0Ne2dYWhpwQvRE8pHjMOdDpgmOHjfEj24s/3 y79upd2Z1lC+MVlV2YExbIemefXb3oo4XNyzv/404uEe0RfX6MtVJ211UvX5JWB86sfXKRjG5 L6uK3dubPhtNOHpqWZSB2HS3N4Xfszeptyu7dxfVBe1iX7d6uxJLcUaioRZzUXEiAEqZulOjA gAA X-Env-Sender: cherry@zyx.in X-Msg-Ref: server-15.tower-21.messagelabs.com!1476810683!38658665!1 X-Originating-IP: [122.166.241.99] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 9.0.13; banners=-,-,- X-VirusChecked: Checked Received: (qmail 45985 invoked from network); 18 Oct 2016 17:11:24 -0000 Received: from abts-kk-static-099.241.166.122.airtelbroadband.in (HELO fooobar.mooo.com) (122.166.241.99) by server-15.tower-21.messagelabs.com with SMTP; 18 Oct 2016 17:11:24 -0000 Received: from [100.107.166.122] (unknown [27.107.105.158]) by fooobar.mooo.com (Postfix) with ESMTPSA id F297266635E; Wed, 19 Oct 2016 04:10:47 +0530 (IST) In-Reply-To: References: <4837AFAF-98EE-4A3D-983F-010EC81DF923@recoil.org> <135c2cd3-9577-e400-f1ba-bd3f91ace472@gmail.com> MIME-Version: 1.0 From: "Cherry G. Mathew" Date: Tue, 18 Oct 2016 17:11:08 +0000 To: Anil Madhavapeddy , Nick Betteridge Message-ID: Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] ARM experiences (was: [cambridge] welcome Takayuki Imada) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTggT2N0b2JlciAyMDE2IDg6Mzg6NTMgcG0gSVNULCBBbmlsIE1hZGhhdmFwZWRkeSA8YW5p bEByZWNvaWwub3JnPiB3cm90ZToKPk9uIDE4IE9jdCAyMDE2LCBhdCAxNjowMSwgTmljayBCZXR0 ZXJpZGdlCj48bGlzdHMubmljay5iZXR0ZXJpZGdlQGdtYWlsLmNvbT4gd3JvdGU6Cj4+IEl0IHdv dWxkIGJlIGdyZWF0LCBhIGxpdHRsZSBsYXRlciBkb3duIHRoZSByb2FkLCBpZiB3ZSBjb3VsZCBz ZXQgdXAgYQo+PiByZXBvc2l0b3J5LCBsaWtlIFNvbG81LCB3aGVyZSB3ZSBjYW4gYm90aCBsZWFy biBhbmQgY29udHJpYnV0ZSB0bwo+PiBhbnl0aGluZyBoYXJkd2FyZSByZWxhdGVkIC0gaW4gdGhl IGZvcm0gb2YgYm90aCBzbmlwcGV0cyBhbmQKPmRlbW9uc3RyYXRvcnMuCj4+IAo+PiBUaGUgZnV0 dXJlIGlzIGxvb2tpbmcgcm9zeSA6LSkKPgo+QWJzb2x1dGVseSAtIGl0J3MgY2xlYXIgZnJvbSB0 aGUgZWFybGllciB0aHJlYWQgb24gQVJNIHRoYXQgaGFyZHdhcmUKPmNvbnRpbnVlcyB0byBiZSBm cmFnbWVudGVkLCBhbmQgYnVpbGQgc3lzdGVtcyBjb250aW51ZSB0byBiZSBjb25mdXNpbmcKPndp dGggcmVzcGVjdCB0byBnZXR0aW5nIGJvb3RhYmxlIGltYWdlcy4KPgoKRldJVywgdGhlIG5ldGJz ZCBidWlsZCBzeXN0ZW0gc3RhbmRzIG91dCBpbiBhIHdvcmxkIG9mIG11Y2suCgpXZSd2ZSBqdXN0 IGZpbmlzaGVkIHJlb3JnYW5pc2luZywgdW5pdCB0ZXN0aW5nIGFuZCBidWlsZGluZyBhIGNyaXRp Y2FsIGtlcm5lbCBWTSBjb21wb25lbnQgaW4gdXNlcmxhbmQsIGZyb20gKndpbmRvd3MqCgotLSAK fmNoZXJyeQoKU2VudCB2aWEgcGhvbmUgZGV2aWNlLiBzb3JyeSBpdCdzIHNob3J0LgoKX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1MtZGV2ZWwg bWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8v bGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFnZW9zLWRl dmVsCg== From mirageos-devel-bounces@lists.xenproject.org Tue Oct 18 17:27:34 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 18 Oct 2016 17:27:34 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwYAm-00032K-4i; 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Mathew" X-Mailer: Apple Mail (2.3124) Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] ARM experiences (was: [cambridge] welcome Takayuki Imada) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" Cj4gT24gMTggT2N0IDIwMTYsIGF0IDE4OjExLCBDaGVycnkgRy4gTWF0aGV3IDxjaGVycnlAenl4 LmluPiB3cm90ZToKPiAKPiBPbiAxOCBPY3RvYmVyIDIwMTYgODozODo1MyBwbSBJU1QsIEFuaWwg TWFkaGF2YXBlZGR5IDxhbmlsQHJlY29pbC5vcmc+IHdyb3RlOgo+PiBPbiAxOCBPY3QgMjAxNiwg YXQgMTY6MDEsIE5pY2sgQmV0dGVyaWRnZQo+PiA8bGlzdHMubmljay5iZXR0ZXJpZGdlQGdtYWls LmNvbT4gd3JvdGU6Cj4+PiBJdCB3b3VsZCBiZSBncmVhdCwgYSBsaXR0bGUgbGF0ZXIgZG93biB0 aGUgcm9hZCwgaWYgd2UgY291bGQgc2V0IHVwIGEKPj4+IHJlcG9zaXRvcnksIGxpa2UgU29sbzUs IHdoZXJlIHdlIGNhbiBib3RoIGxlYXJuIGFuZCBjb250cmlidXRlIHRvCj4+PiBhbnl0aGluZyBo YXJkd2FyZSByZWxhdGVkIC0gaW4gdGhlIGZvcm0gb2YgYm90aCBzbmlwcGV0cyBhbmQKPj4gZGVt b25zdHJhdG9ycy4KPj4+IAo+Pj4gVGhlIGZ1dHVyZSBpcyBsb29raW5nIHJvc3kgOi0pCj4+IAo+ PiBBYnNvbHV0ZWx5IC0gaXQncyBjbGVhciBmcm9tIHRoZSBlYXJsaWVyIHRocmVhZCBvbiBBUk0g dGhhdCBoYXJkd2FyZQo+PiBjb250aW51ZXMgdG8gYmUgZnJhZ21lbnRlZCwgYW5kIGJ1aWxkIHN5 c3RlbXMgY29udGludWUgdG8gYmUgY29uZnVzaW5nCj4+IHdpdGggcmVzcGVjdCB0byBnZXR0aW5n IGJvb3RhYmxlIGltYWdlcy4KPj4gCj4gCj4gRldJVywgdGhlIG5ldGJzZCBidWlsZCBzeXN0ZW0g c3RhbmRzIG91dCBpbiBhIHdvcmxkIG9mIG11Y2suCj4gCj4gV2UndmUganVzdCBmaW5pc2hlZCBy ZW9yZ2FuaXNpbmcsIHVuaXQgdGVzdGluZyBhbmQgYnVpbGRpbmcgYSBjcml0aWNhbCBrZXJuZWwg Vk0gY29tcG9uZW50IGluIHVzZXJsYW5kLCBmcm9tICp3aW5kb3dzKgoKV2UgYXJlIHNhZGx5IHN0 dWNrIGJ1aWxkaW5nIExpbnV4IGtlcm5lbHMgYXQgdGhpcyBzdGFnZSA6LSkKCk9uZSB0aGluZyB0 aGF0IGhhcyBmcmVxdWVudGx5IG9jY3VycmVkIHRvIG1lIGlzIHRoYXQgaXQgbWlnaHQKYmUgbmlj ZSB0byB1c2UgTmV0QlNEIHBrZ3NyYyBhcyB0aGUgYmFzaXMgZm9yIEMgc3R1YiBjb21waWxhdGlv bgphbmQgaW50ZXJmYWNpbmcgd2l0aCBPUyBsaWJyYXJpZXMsIGJ1dCBJJ3ZlIG5ldmVyIGludmVz dGlnYXRlZAppbiBkZXB0aC4gIFRoZSBtYWluIGlzc3VlIHdpdGggdGhpcyAoYXMgSSB1bmRlcnN0 YW5kIGl0KSBpcyB0aGF0CnBrZ3NyYyBwcmVmZXJzIHRvIG93biB0aGUgY29tcGlsYXRpb24gb2Yg YWxsIGxpYnJhcmllcyBhbmQgbm90CnBhc3MgdGhyb3VnaCB0byBwcmVpbnN0YWxsZWQgT1MgdmVy c2lvbnMuICBTdGlsbCwgc2luY2UgUnVtcApoYXMgYmVlbiB1cHN0cmVhbWVkIHRvIE5ldEJTRCB0 aGUgc2l0dWF0aW9uIGZvciB0aGUgYmFzZQpidWlsZCBjYW4gb25seSBiZSBnZXR0aW5nIGJldHRl ciB3aXRoIHJlc3BlY3QgdG8gdW5pa2VybmVsCnN1cHBvcnQuCgpBbmlsCgpfX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpNaXJhZ2VPUy1kZXZlbCBtYWlsaW5n IGxpc3QKTWlyYWdlT1MtZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54 ZW5wcm9qZWN0Lm9yZy9jZ2ktYmluL21haWxtYW4vbGlzdGluZm8vbWlyYWdlb3MtZGV2ZWwK From mirageos-devel-bounces@lists.xenproject.org Tue Oct 18 17:27:34 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 18 Oct 2016 17:27:34 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwYAm-00032K-4i; 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Mathew" X-Mailer: Apple Mail (2.3124) Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] ARM experiences (was: [cambridge] welcome Takayuki Imada) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" Cj4gT24gMTggT2N0IDIwMTYsIGF0IDE4OjExLCBDaGVycnkgRy4gTWF0aGV3IDxjaGVycnlAenl4 LmluPiB3cm90ZToKPiAKPiBPbiAxOCBPY3RvYmVyIDIwMTYgODozODo1MyBwbSBJU1QsIEFuaWwg TWFkaGF2YXBlZGR5IDxhbmlsQHJlY29pbC5vcmc+IHdyb3RlOgo+PiBPbiAxOCBPY3QgMjAxNiwg YXQgMTY6MDEsIE5pY2sgQmV0dGVyaWRnZQo+PiA8bGlzdHMubmljay5iZXR0ZXJpZGdlQGdtYWls LmNvbT4gd3JvdGU6Cj4+PiBJdCB3b3VsZCBiZSBncmVhdCwgYSBsaXR0bGUgbGF0ZXIgZG93biB0 aGUgcm9hZCwgaWYgd2UgY291bGQgc2V0IHVwIGEKPj4+IHJlcG9zaXRvcnksIGxpa2UgU29sbzUs IHdoZXJlIHdlIGNhbiBib3RoIGxlYXJuIGFuZCBjb250cmlidXRlIHRvCj4+PiBhbnl0aGluZyBo YXJkd2FyZSByZWxhdGVkIC0gaW4gdGhlIGZvcm0gb2YgYm90aCBzbmlwcGV0cyBhbmQKPj4gZGVt b25zdHJhdG9ycy4KPj4+IAo+Pj4gVGhlIGZ1dHVyZSBpcyBsb29raW5nIHJvc3kgOi0pCj4+IAo+ PiBBYnNvbHV0ZWx5IC0gaXQncyBjbGVhciBmcm9tIHRoZSBlYXJsaWVyIHRocmVhZCBvbiBBUk0g dGhhdCBoYXJkd2FyZQo+PiBjb250aW51ZXMgdG8gYmUgZnJhZ21lbnRlZCwgYW5kIGJ1aWxkIHN5 c3RlbXMgY29udGludWUgdG8gYmUgY29uZnVzaW5nCj4+IHdpdGggcmVzcGVjdCB0byBnZXR0aW5n IGJvb3RhYmxlIGltYWdlcy4KPj4gCj4gCj4gRldJVywgdGhlIG5ldGJzZCBidWlsZCBzeXN0ZW0g c3RhbmRzIG91dCBpbiBhIHdvcmxkIG9mIG11Y2suCj4gCj4gV2UndmUganVzdCBmaW5pc2hlZCBy ZW9yZ2FuaXNpbmcsIHVuaXQgdGVzdGluZyBhbmQgYnVpbGRpbmcgYSBjcml0aWNhbCBrZXJuZWwg Vk0gY29tcG9uZW50IGluIHVzZXJsYW5kLCBmcm9tICp3aW5kb3dzKgoKV2UgYXJlIHNhZGx5IHN0 dWNrIGJ1aWxkaW5nIExpbnV4IGtlcm5lbHMgYXQgdGhpcyBzdGFnZSA6LSkKCk9uZSB0aGluZyB0 aGF0IGhhcyBmcmVxdWVudGx5IG9jY3VycmVkIHRvIG1lIGlzIHRoYXQgaXQgbWlnaHQKYmUgbmlj ZSB0byB1c2UgTmV0QlNEIHBrZ3NyYyBhcyB0aGUgYmFzaXMgZm9yIEMgc3R1YiBjb21waWxhdGlv bgphbmQgaW50ZXJmYWNpbmcgd2l0aCBPUyBsaWJyYXJpZXMsIGJ1dCBJJ3ZlIG5ldmVyIGludmVz dGlnYXRlZAppbiBkZXB0aC4gIFRoZSBtYWluIGlzc3VlIHdpdGggdGhpcyAoYXMgSSB1bmRlcnN0 YW5kIGl0KSBpcyB0aGF0CnBrZ3NyYyBwcmVmZXJzIHRvIG93biB0aGUgY29tcGlsYXRpb24gb2Yg YWxsIGxpYnJhcmllcyBhbmQgbm90CnBhc3MgdGhyb3VnaCB0byBwcmVpbnN0YWxsZWQgT1MgdmVy c2lvbnMuICBTdGlsbCwgc2luY2UgUnVtcApoYXMgYmVlbiB1cHN0cmVhbWVkIHRvIE5ldEJTRCB0 aGUgc2l0dWF0aW9uIGZvciB0aGUgYmFzZQpidWlsZCBjYW4gb25seSBiZSBnZXR0aW5nIGJldHRl ciB3aXRoIHJlc3BlY3QgdG8gdW5pa2VybmVsCnN1cHBvcnQuCgpBbmlsCgpfX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpNaXJhZ2VPUy1kZXZlbCBtYWlsaW5n IGxpc3QKTWlyYWdlT1MtZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54 ZW5wcm9qZWN0Lm9yZy9jZ2ktYmluL21haWxtYW4vbGlzdGluZm8vbWlyYWdlb3MtZGV2ZWwK From mirageos-devel-bounces@lists.xenproject.org Tue Oct 18 18:10:16 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Tue, 18 Oct 2016 18:10:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwYq4-0006AW-8L; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 46029 invoked from network); 18 Oct 2016 18:10:09 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-13.tower-21.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 18 Oct 2016 18:10:09 -0000 Received: from [10.1.2.240] (unknown [160.176.188.221]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id 3C9833695 for ; Tue, 18 Oct 2016 20:10:08 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: <4837AFAF-98EE-4A3D-983F-010EC81DF923@recoil.org> From: Hannes Mehnert Message-ID: <027d9fe2-e22d-a8ca-2287-01e9c235e8f8@mehnert.org> Date: Tue, 18 Oct 2016 19:09:38 +0100 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <4837AFAF-98EE-4A3D-983F-010EC81DF923@recoil.org> Subject: Re: [MirageOS-devel] [cambridge] welcome Takayuki Imada X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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Wed, 19 Oct 2016 01:30:29 -0700 (PDT) From: Gemma Gordon Date: Wed, 19 Oct 2016 09:30:29 +0100 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel@lists.xenproject.org Subject: [MirageOS-devel] Canopy and Liveblogging X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5856743947515307322==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============5856743947515307322== Content-Type: multipart/alternative; boundary=089e013c6b70f5d049053f33a0f4 --089e013c6b70f5d049053f33a0f4 Content-Type: text/plain; charset=UTF-8 Hi all, I have spent a lot of time recently using Canopy for liveblogging various Mirage-related events specifically ICFP and the Docker Distributed Systems Summit. I'd like to thank Enguerrand Decorne for his help with Canopy, Anil Madhavapeddy for his help in making it even easier to contribute to, Joel Jakubovic, Ciaran Lawlor, Mindy Preston, and Olivier Nicole for all using it during ICFP/OCaml workshop and CUFP, and also Gabriel Scherer for making everyone aware of it and encouraging its use. We collectively covered 54 talks that week, and you can see the liveblogs here: http://icfp2016.mirage.io/OCaml along with a summary post here: http://reynard.io/2016/10/19/icfp-2016-roundup.html (new blog under construction!). I also made a few small changes to the mirage-canopy site to cover the Docker summit: http://canopy.mirage.io/Liveblog and wrote summaries of each talk plus Q&As. The focus of the summit was distributed systems, and much of the work featured was open-source, OCaml-related, or relevant to Mirage e.g. the TUF Framework: http://canopy.mirage.io/Liveblog/TUFDDS2016 Thanks, Gemma --089e013c6b70f5d049053f33a0f4 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
= Hi all,

<= /div>
I have spent a lot of time recently using Canopy for liveblogging variou= s Mirage-related events specifically ICFP and the Docker Distributed System= s Summit.

I'd like to thank Enguerrand Decorne= for his help with Canopy, Anil Madhavapeddy for his help in making it even= easier to contribute to, Joel Jakubovic, Ciaran Lawlor, Mindy Preston, and= Olivier Nicole for all using it during ICFP/OCaml workshop and CUFP, and a= lso Gabriel Scherer for making everyone aware of it and encouraging its use= . We collectively covered 54 talks that week, and you can see the liveblogs= here:=C2=A0

http://icfp2016.mirage.io/OCaml along with a summary post here:<= /font>

http://reynard.io/2016/10/19/icfp-2016-roundup.html (new = blog under construction!).

I also made a few small= changes to the mirage-canopy site to cover the Docker summit: http://canopy.mirage.io/Liveblog and w= rote summaries of each talk plus Q&As. The focus of the summit was dist= ributed systems, and much of the work featured was open-source, OCaml-relat= ed, or relevant to Mirage e.g. the TUF Framework: http://canopy.mirage.io/Liveblog/TUFDDS2016<= /a>

Thanks,

Gemma
=
--089e013c6b70f5d049053f33a0f4-- --===============5856743947515307322== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============5856743947515307322==-- From mirageos-devel-bounces@lists.xenproject.org Wed Oct 19 08:31:14 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 19 Oct 2016 08:31:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwmHA-0008Ry-LZ; Wed, 19 Oct 2016 08:31:04 +0000 Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwmH9-0008Rr-3s for mirageos-devel@lists.xenproject.org; Wed, 19 Oct 2016 08:31:03 +0000 Received: from [85.158.137.68] by server-6.bemta-3.messagelabs.com id 21/06-28813-54F27085; Wed, 19 Oct 2016 08:31:01 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrBIsWRWlGSWpSXmKPExsXSnM/Rq+uizx5 h8PqrjEVv610WB0aPwx+usAQwRrFm5iXlVySwZhz4NJO54Lh8xcaF51kaGKfLdDFyckgIKEps bdzI3MXIAWRbSrxaU9DFyMUhJPCMSaL78n5mCGceo8SKw1OYIBpyJM4cXMgKYZdIXNv8CszmF RCUODnzCQvIICEBb4mDTw1BwmwC6hL9u1vYQGwWAVWJ0+vOMEO0Jkoce9gJ1RogsfjXSxYQW1 hAQWLdvnNgcRGg3mWn7jOC2MwCXhL7Xl5lhKjRkfj75jfjBEaBWUg2z0JSNgvoCmag9vXzhCD CahK3t11lh7C1JZYtfM28gJF1FaNGcWpRWWqRrqGpXlJRZnpGSW5iZo6uoYGxXm5qcXFiempO YlKxXnJ+7iZGYCgzAMEOxjXbPQ8xSnIwKYnyHp7KFiHEl5SfUpmRWJwRX1Sak1p8iFGGg0NJg tdHjz1CSLAoNT21Ii0zBxhVMGkJDh4lEd58kDRvcUFibnFmOkTqFKMux5ap99YyCbHk5eelSo nz+oIUCYAUZZTmwY2ARfglRlkpYV5GoKOEeApSi3IzS1DlXzGKczAqCfN2gkzhycwrgdv0Cug IJqAjzuWxgBxRkoiQkmpgnBW3S+qW25vCfCne/X7LSuWWzvhw8OtG5yUzZ15bXr/VsfHFruCG A6zr/pyvYbS/vb/4h/2513fPTxCOemRyTKyp6PeqSX9tKi4YKNmn/HI9/dtcqn9LH5Nu2GGNm Mnx8l22tk8XZdZODzmqFZng8+7tRqn7R+8uWq3ClLn/4K+WgEdK9V+iFymxFGckGmoxFxUnAg CNK1nD6wIAAA== X-Env-Sender: gg417@hermes.cam.ac.uk X-Msg-Ref: server-2.tower-31.messagelabs.com!1476865860!66838719!1 X-Originating-IP: [131.111.8.141] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMTMxLjExMS44LjE0MSA9PiAxNTQ4NjI=\n X-StarScan-Received: X-StarScan-Version: 8.84; banners=-,-,- X-VirusChecked: Checked Received: (qmail 21580 invoked from network); 19 Oct 2016 08:31:00 -0000 Received: from ppsw-41.csi.cam.ac.uk (HELO ppsw-41.csi.cam.ac.uk) (131.111.8.141) by server-2.tower-31.messagelabs.com with SMTP; 19 Oct 2016 08:31:00 -0000 X-Cam-AntiVirus: no malware found X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/ Received: from mail-wm0-f42.google.com ([74.125.82.42]:35844) by ppsw-41.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.159]:587) with esmtpsa (PLAIN:gg417) (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) id 1bwmH6-0001L4-Q8 (Exim 4.86_36-e07b163) for mirageos-devel@lists.xenproject.org (return-path ); Wed, 19 Oct 2016 09:31:00 +0100 Received: by mail-wm0-f42.google.com with SMTP id f193so44585486wmg.1 for ; Wed, 19 Oct 2016 01:31:00 -0700 (PDT) X-Gm-Message-State: AA6/9RlV0cO9tBjLC/CiuDO9yQ7ekfrog7nuYLIn0H/ZJRb2H0jc1+nfmEOoE+WI9NGj4792iK9Vx2FLq76jzw== X-Received: by 10.194.157.169 with SMTP id wn9mr3300002wjb.195.1476865859896; Wed, 19 Oct 2016 01:30:59 -0700 (PDT) MIME-Version: 1.0 Received: by 10.28.152.150 with HTTP; Wed, 19 Oct 2016 01:30:29 -0700 (PDT) From: Gemma Gordon Date: Wed, 19 Oct 2016 09:30:29 +0100 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel@lists.xenproject.org Subject: [MirageOS-devel] Canopy and Liveblogging X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5856743947515307322==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============5856743947515307322== Content-Type: multipart/alternative; boundary=089e013c6b70f5d049053f33a0f4 --089e013c6b70f5d049053f33a0f4 Content-Type: text/plain; charset=UTF-8 Hi all, I have spent a lot of time recently using Canopy for liveblogging various Mirage-related events specifically ICFP and the Docker Distributed Systems Summit. I'd like to thank Enguerrand Decorne for his help with Canopy, Anil Madhavapeddy for his help in making it even easier to contribute to, Joel Jakubovic, Ciaran Lawlor, Mindy Preston, and Olivier Nicole for all using it during ICFP/OCaml workshop and CUFP, and also Gabriel Scherer for making everyone aware of it and encouraging its use. We collectively covered 54 talks that week, and you can see the liveblogs here: http://icfp2016.mirage.io/OCaml along with a summary post here: http://reynard.io/2016/10/19/icfp-2016-roundup.html (new blog under construction!). I also made a few small changes to the mirage-canopy site to cover the Docker summit: http://canopy.mirage.io/Liveblog and wrote summaries of each talk plus Q&As. The focus of the summit was distributed systems, and much of the work featured was open-source, OCaml-related, or relevant to Mirage e.g. the TUF Framework: http://canopy.mirage.io/Liveblog/TUFDDS2016 Thanks, Gemma --089e013c6b70f5d049053f33a0f4 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
= Hi all,

<= /div>
I have spent a lot of time recently using Canopy for liveblogging variou= s Mirage-related events specifically ICFP and the Docker Distributed System= s Summit.

I'd like to thank Enguerrand Decorne= for his help with Canopy, Anil Madhavapeddy for his help in making it even= easier to contribute to, Joel Jakubovic, Ciaran Lawlor, Mindy Preston, and= Olivier Nicole for all using it during ICFP/OCaml workshop and CUFP, and a= lso Gabriel Scherer for making everyone aware of it and encouraging its use= . We collectively covered 54 talks that week, and you can see the liveblogs= here:=C2=A0

http://icfp2016.mirage.io/OCaml along with a summary post here:<= /font>

http://reynard.io/2016/10/19/icfp-2016-roundup.html (new = blog under construction!).

I also made a few small= changes to the mirage-canopy site to cover the Docker summit: http://canopy.mirage.io/Liveblog and w= rote summaries of each talk plus Q&As. The focus of the summit was dist= ributed systems, and much of the work featured was open-source, OCaml-relat= ed, or relevant to Mirage e.g. the TUF Framework: http://canopy.mirage.io/Liveblog/TUFDDS2016<= /a>

Thanks,

Gemma
=
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Wed, 19 Oct 2016 08:37:58 +0000 Received: from [85.158.143.35] by server-1.bemta-6.messagelabs.com id A5/F2-01767-5E037085; Wed, 19 Oct 2016 08:37:57 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrJIsWRWlGSWpSXmKPExsVyMfTqWt3HBuw RBr+3m1r0tt5lcWD0OPzhCksAYxRrZl5SfkUCa0bX/XXMBbtMKk4fbmZpYNyk38XIxSEkMJdR 4mTzUyYQh0XgM4vE9hNrmEEcCYGZrBKbupeydTFyAjk5EsdWXGSCsIskfvy9yAxi8woISpyc+ YQFxBYSCJC4/+8JO4jNKRAosf3IWVYQm01AX+LDzE6wXhYBVYn2GxfYIHoDJB5snwsWFxYwlf hz9QUjiC0i4CVxa8pasBpmIPvHy83sExj5ZiFZNwtJahYjB5CtLrF+nhBEWE3i9rar7BC2tsS yha+ZFzCyrmLUKE4tKkst0jUy0EsqykzPKMlNzMzRNTQw08tNLS5OTE/NSUwq1kvOz93ECAxQ BiDYwfhrWcAhRkkOJiVR3sNT2SKE+JLyUyozEosz4otKc1KLDzHKcHAoSfDe1mePEBIsSk1Pr UjLzAHGCkxagoNHSYR3Nkiat7ggMbc4Mx0idYrRmGPL72trmTi2Tb23lkmIJS8/L1VKnHcLSK kASGlGaR7cIFgMX2KUlRLmZQQ6TYinILUoN7MEVf4VozgHo5Iw7xeQKTyZeSVw+14BncIEdMq 5PBaQU0oSEVJSDYyppuEe9YZOYRsvq6quXvVSMWndpbgXknW5S6KviV7vkOW89mra9aqGA+HP 8mzCXm5oZ3wxJ3qO84XZ3+O+CObMZjq99oj4sfsc//iu3OYTuC234WBNpHMt99MNa8JdDLYos a7TL7GZciK/tHT3nNUsP03Wv5z1Ss6s4S/jjSNfo1f5ZmvV7TZTYinOSDTUYi4qTgQAPWx0t9 wCAAA= X-Env-Sender: decorne.en@gmail.com X-Msg-Ref: server-9.tower-21.messagelabs.com!1476866275!38753187!1 X-Originating-IP: [209.85.213.173] X-SpamReason: No, hits=0.6 required=7.0 tests=HTML_60_70,HTML_MESSAGE, MAILTO_TO_SPAM_ADDR X-StarScan-Received: X-StarScan-Version: 9.0.13; banners=-,-,- X-VirusChecked: Checked Received: (qmail 49091 invoked from network); 19 Oct 2016 08:37:55 -0000 Received: from mail-yb0-f173.google.com (HELO mail-yb0-f173.google.com) (209.85.213.173) by server-9.tower-21.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 19 Oct 2016 08:37:55 -0000 Received: by mail-yb0-f173.google.com with SMTP id 184so6486209yby.2 for ; Wed, 19 Oct 2016 01:37:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=24e+c/ZQTiccQu4YLFqOaAQ18m85B6mLLtBAeY1txN4=; b=bpxzeUGuIbx5t++4gGGqGsk3dP9BWUtc4axYC0s3ytuvhfn7Es5C+Io42qKaKwvpjB pVIbp9SPHRBVcqusdUj/4oAnYVy3p/iu6q1XQdZze1U37kUHOqFw/zze8xVkWfWlhYZK 3qbHin0065rBj/lmsSMlekm/7r6GXccMY12PyuZoXPDN8FK/PG0Whoj7jHhqH7fzgITZ aV32F1uM+mk3B+Rixi8yjUuh9u4FcdbpHDQdeBtXnwNz3vtTMVdX2fwftko2cX1MMXj8 hVeC/8sfueDFDGUR0mGAYSZ6E3yOAb5SxAEO6hY0vA/LV87Wel8LkRl3rsoi3Wa0zjpY 6p+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=24e+c/ZQTiccQu4YLFqOaAQ18m85B6mLLtBAeY1txN4=; b=k8AIXM0GCVsYNVW3QVNXSMskpzCpzHKe+vUMsyFlzjnb+NcsF92BD6lDEmlEAXU0eP we11+TdnAeh14tcOl+ATCYY9CHvQ5pWmx86gXQqTjyP3fkSv1gHAWF3RL1lQuaZrLys0 0aeedYChatEpDL1gbvh3W+5YvkrEbXOLacb8JzE6jzJbSmpXtS3RgH57omAKt2WAUE3k MgMgQTxn1YxX7hZrUlLXDH4CRV0ntS5x5WXq64uZ4WLPlcXDl8Vq0U2/VVJwV5Osb3O5 LlXN2CpzepOez8gdl2drZ4qJKn9pvo8iPzrXWG73yFpa+1Ljwy2HbNY0W4F91DHrss+X fS8A== X-Gm-Message-State: AA6/9RlBhIQdGCjViNLEUC7FRulwEnZzScd5qgjWvmqe/x8wwyxtRd4H5f13C6hYsmvUNlF4GkNAvJ7Zn5bb5g== X-Received: by 10.37.165.10 with SMTP id h10mr4732968ybi.123.1476866274667; Wed, 19 Oct 2016 01:37:54 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Enguerrand Decorne Date: Wed, 19 Oct 2016 08:37:44 +0000 Message-ID: To: Gemma Gordon , mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Canopy and Liveblogging X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============3468786759595805499==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============3468786759595805499== Content-Type: multipart/alternative; boundary=94eb2c19f636aed590053f33b9b4 --94eb2c19f636aed590053f33b9b4 Content-Type: text/plain; charset=UTF-8 On Wed, Oct 19, 2016, 5:32 PM Gemma Gordon wrote: > Hi all, > > I have spent a lot of time recently using Canopy for liveblogging various > Mirage-related events specifically ICFP and the Docker Distributed Systems > Summit. > > I'd like to thank Enguerrand Decorne for his help with Canopy, > And also Hannes for his nice work on improving Canopy, making it usable. :-) Anil Madhavapeddy for his help in making it even easier to contribute to, > Joel Jakubovic, Ciaran Lawlor, Mindy Preston, and Olivier Nicole for all > using it during ICFP/OCaml workshop and CUFP, and also Gabriel Scherer for > making everyone aware of it and encouraging its use. We collectively > covered 54 talks that week, and you can see the liveblogs here: > > http://icfp2016.mirage.io/OCaml along with a summary post here: > > http://reynard.io/2016/10/19/icfp-2016-roundup.html (new blog under > construction!). > > I also made a few small changes to the mirage-canopy site to cover the > Docker summit: http://canopy.mirage.io/Liveblog and wrote summaries of > each talk plus Q&As. The focus of the summit was distributed systems, and > much of the work featured was open-source, OCaml-related, or relevant to > Mirage e.g. the TUF Framework: http://canopy.mirage.io/Liveblog/TUFDDS2016 > > Thanks, > > Gemma > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > -- Enguerrand Decorne, Baker at Rainbow Cookies --94eb2c19f636aed590053f33b9b4 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Hi all,

I have spent = a lot of time recently using Canopy for liveblogging various Mirage-relate= d events specifically ICFP and the Docker Distributed Systems Summit.

=
I'd like to thank Enguerrand Decorne for = his help with Canopy,
And also Hannes for his nice work on improving Canopy, making = it usable. :-)

Anil Madhavapeddy for h= is help in making it even easier to contribute to, Joel Jakubovic, Ciaran = Lawlor, Mindy Preston, and Olivier Nicole for all using it during ICFP/OCa= ml workshop and CUFP, and also Gabriel Scherer for making everyone aware o= f it and encouraging its use. We collectively covered 54 talks that week, = and you can see the liveblogs here:=C2=A0

http://icfp2016.mirage.io/OCaml along with a summary post her= e:

http://rey= nard.io/2016/10/19/icfp-2016-roundup.html (new blog under construction= !).

I also made a few small changes to th= e mirage-canopy site to cover the Docker summit: http://canopy.mi= rage.io/Liveblog and wrote summaries of each talk plus Q&As. The f= ocus of the summit was distributed systems, and much of the work featured = was open-source, OCaml-related, or relevant to Mirage e.g. the TUF Framewo= rk: http://canopy.mirage.io/Liveblog/TUFDDS2016

Thanks,

Gemma
_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@lists.xenproject.org
https://li= sts.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel
--
Enguerrand Decorne,
Baker at Rainbow Co= okies
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boundary="===============3468786759595805499==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============3468786759595805499== Content-Type: multipart/alternative; boundary=94eb2c19f636aed590053f33b9b4 --94eb2c19f636aed590053f33b9b4 Content-Type: text/plain; charset=UTF-8 On Wed, Oct 19, 2016, 5:32 PM Gemma Gordon wrote: > Hi all, > > I have spent a lot of time recently using Canopy for liveblogging various > Mirage-related events specifically ICFP and the Docker Distributed Systems > Summit. > > I'd like to thank Enguerrand Decorne for his help with Canopy, > And also Hannes for his nice work on improving Canopy, making it usable. :-) Anil Madhavapeddy for his help in making it even easier to contribute to, > Joel Jakubovic, Ciaran Lawlor, Mindy Preston, and Olivier Nicole for all > using it during ICFP/OCaml workshop and CUFP, and also Gabriel Scherer for > making everyone aware of it and encouraging its use. We collectively > covered 54 talks that week, and you can see the liveblogs here: > > http://icfp2016.mirage.io/OCaml along with a summary post here: > > http://reynard.io/2016/10/19/icfp-2016-roundup.html (new blog under > construction!). > > I also made a few small changes to the mirage-canopy site to cover the > Docker summit: http://canopy.mirage.io/Liveblog and wrote summaries of > each talk plus Q&As. The focus of the summit was distributed systems, and > much of the work featured was open-source, OCaml-related, or relevant to > Mirage e.g. the TUF Framework: http://canopy.mirage.io/Liveblog/TUFDDS2016 > > Thanks, > > Gemma > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > -- Enguerrand Decorne, Baker at Rainbow Cookies --94eb2c19f636aed590053f33b9b4 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

On Wed, Oct 19, 2016, = 5:32 PM Gemma Gordon <gg417@cl.ca= m.ac.uk> wrote:
Hi all,

I have spent = a lot of time recently using Canopy for liveblogging various Mirage-relate= d events specifically ICFP and the Docker Distributed Systems Summit.

=
I'd like to thank Enguerrand Decorne for = his help with Canopy,
And also Hannes for his nice work on improving Canopy, making = it usable. :-)

Anil Madhavapeddy for h= is help in making it even easier to contribute to, Joel Jakubovic, Ciaran = Lawlor, Mindy Preston, and Olivier Nicole for all using it during ICFP/OCa= ml workshop and CUFP, and also Gabriel Scherer for making everyone aware o= f it and encouraging its use. We collectively covered 54 talks that week, = and you can see the liveblogs here:=C2=A0

http://icfp2016.mirage.io/OCaml along with a summary post her= e:

http://rey= nard.io/2016/10/19/icfp-2016-roundup.html (new blog under construction= !).

I also made a few small changes to th= e mirage-canopy site to cover the Docker summit: http://canopy.mi= rage.io/Liveblog and wrote summaries of each talk plus Q&As. The f= ocus of the summit was distributed systems, and much of the work featured = was open-source, OCaml-related, or relevant to Mirage e.g. the TUF Framewo= rk: http://canopy.mirage.io/Liveblog/TUFDDS2016

Thanks,

Gemma
_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@lists.xenproject.org
https://li= sts.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel
--
Enguerrand Decorne,
Baker at Rainbow Co= okies
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19 Oct 2016 11:56:54 +0200 (CEST) Date: Wed, 19 Oct 2016 11:56:54 +0200 From: Martin Lucina To: mirageos-devel@lists.xenproject.org Message-ID: <20161019095654.GB18717@nodbug.lucina.net> Mail-Followup-To: mirageos-devel@lists.xenproject.org References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Subject: Re: [MirageOS-devel] docs.mirage.io building again X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gRnJpZGF5LCAxNC4xMC4yMDE2IGF0wqAxMToyOSwgQW5pbCBNYWRoYXZhcGVkZHkgd3JvdGU6 Cj4gR29vZCBuZXdzIGV2ZXJ5b25lISBUaGUgZXhwZXJpbWVudGFsIGRvY3VtZW50YXRpb24gcmVw b3NpdG9yeSBhdCBodHRwOi8vZG9jcy5taXJhZ2UuaW8gbm93IGJ1aWxkcyBhZ2FpbiwgYW5kIGhh 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Wed, 19 Oct 2016 03:53:19 -0700 (PDT) From: Gemma Gordon Date: Wed, 19 Oct 2016 11:53:19 +0100 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel@lists.xenproject.org Subject: [MirageOS-devel] MirageOS feedback and fortnightly catchup - Wednesday 19 October 4pm UK time (UTC+1) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5618110015646363213==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============5618110015646363213== Content-Type: multipart/alternative; boundary=089e0102e3d0c2559a053f359f07 --089e0102e3d0c2559a053f359f07 Content-Type: text/plain; charset=UTF-8 Hi all, We'll be using IRC again so please join #mirage on Freenode. We would like to gather some feedback on the fortnightly calls/chats, so please fill out this *anonymous* form with your thoughts here: https://goo.gl/forms/NnNnk2JpD0ujbBoV2 by Monday 24th October. IRC logs from previous session are currently up at: *http://canopy.mirage.io/irclogs/05-10-2016 * and this session will also be logged at: http://canopy.mirage.io/irclogs The agenda for the meeting is at: https://github.com/mirage/mirage-www/wiki/Call-Agenda Please add items to the agenda to be discussed. Thanks, Gemma --089e0102e3d0c2559a053f359f07 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi all,

We'll be using IRC aga= in so please join #mirage=C2=A0on Freenode.

We would like to gather some feedback on the fortnightly calls/chats, so = please fill out this anonymous form with your thoughts here: https://goo.gl/forms/NnNnk2Jp= D0ujbBoV2=C2=A0by Monday 24th October.

IRC log= s from previous session are currently=C2=A0up=C2=A0= at:
http://canopy.mirage.io/irclogs/05-10-2016
and this session will also be logged at:
http://canopy.mirage.io/irclogs

The agenda for the meeting is at:
<= a href=3D"https://github.com/mirage/mirage-www/wiki/Call-Agenda" rel=3D"no= referrer" target=3D"_blank" style=3D"font-size:12.8px">https://github.com/= mirage/mirag= e-www/wiki/Call-Agenda

Please add items to the agenda to be discussed.

Thanks,
=

Gemma<= /div>

<= br>
--089e0102e3d0c2559a053f359f07-- --===============5618110015646363213== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============5618110015646363213==-- From mirageos-devel-bounces@lists.xenproject.org Wed Oct 19 10:53:57 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 19 Oct 2016 10:53:57 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwoVP-0001QZ-Rk; Wed, 19 Oct 2016 10:53:55 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwoVO-0001QT-2B for mirageos-devel@lists.xenproject.org; Wed, 19 Oct 2016 10:53:54 +0000 Received: from [85.158.139.211] by server-15.bemta-5.messagelabs.com id 67/F5-01343-1C057085; Wed, 19 Oct 2016 10:53:53 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrCIsWRWlGSWpSXmKPExsXSnM/RpLs/gD3 CoPklo0Vv610WB0aPwx+usAQwRrFm5iXlVySwZvw6cJi54L1kxYwbV1gbGL+LdzFyckgIKEps bdzI3MXIAWRbSrxaU9DFyMUhJPCSSWJ903pGCGc+o8TBw49YIIpyJC73+kH0FkncaJrMDGLzC ghKnJz5hAXEFhLwlrj8aj4TiM0moC7Rv7uFDcRmEVCVOLnoLCNEb6LE6S8d7BC9ARJLexaC1Q gL5Eu07rsN1isC1Lvs1H2wemYBL4nJ2+8xQdToSPx985txAqPALCSrZyEpmwV0KTNQ+/p5QhB hNYnb266yQ9jaEssWvmZewMi6ilGjOLWoLLVI18hQL6koMz2jJDcxM0fX0MBULze1uDgxPTUn MalYLzk/dxMjMJTrGRgYdzDenex3iFGSg0lJlPfwVLYIIb6k/JTKjMTijPii0pzU4kOMMhwcS hK8l/3ZI4QEi1LTUyvSMnOAUQWTluDgURLhvQiS5i0uSMwtzkyHSJ1itOTY8vvaWiaOWavuAM ltU++tZRJiycvPS5US510J0iAA0pBRmgc3Dhb5lxhlpYR5GRkYGIR4ClKLcjNLUOVfMYpzMCo J8xqBTOHJzCuB2/oK6CAmoIPO5bGAHFSSiJCSamBUzJFgLavdbcvoMOn2+bfiCZOO/jxS0ZUa O8mlzNPCX/2AT0jMmc3/clbpWn1ivjBD1XNl+O7n+Xrhu+bf/Vyg+3Pdb6v91l6t567cyl8oa +o9s3/SbddkMablhXIlJ7I29pUdZn1zwvQkv675rgO8jKctlRh0tX++t3y/p+Nhh6ofawtfOb MSS3FGoqEWc1FxIgDeOq+Z9wIAAA== X-Env-Sender: gg417@hermes.cam.ac.uk X-Msg-Ref: server-10.tower-206.messagelabs.com!1476874430!48482513!1 X-Originating-IP: [131.111.8.130] X-SpamReason: No, hits=0.3 required=7.0 tests=HTML_MESSAGE, ML_RADAR_SPEW_LINKS_8,RCVD_BY_IP,spamassassin: X-StarScan-Received: X-StarScan-Version: 9.0.13; banners=-,-,- X-VirusChecked: Checked Received: (qmail 30859 invoked from network); 19 Oct 2016 10:53:51 -0000 Received: from ppsw-30.csi.cam.ac.uk (HELO ppsw-30.csi.cam.ac.uk) (131.111.8.130) by server-10.tower-206.messagelabs.com with SMTP; 19 Oct 2016 10:53:51 -0000 X-Cam-AntiVirus: no malware found X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/ Received: from mail-qk0-f170.google.com ([209.85.220.170]:34717) by ppsw-30.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.156]:587) with esmtpsa (PLAIN:gg417) (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) id 1bwoVK-0003rP-ef (Exim 4.86_36-e07b163) for mirageos-devel@lists.xenproject.org (return-path ); Wed, 19 Oct 2016 11:53:50 +0100 Received: by mail-qk0-f170.google.com with SMTP id f128so26611869qkb.1 for ; Wed, 19 Oct 2016 03:53:50 -0700 (PDT) X-Gm-Message-State: AA6/9RkB1shKtdLgvpFd6Mi/O4YNoMQQXccRyxrbOl5s9jQQYRfwW7B8p0Lho2ZbuSx9CnkSOD78FmIBo5gVxg== X-Received: by 10.194.87.42 with SMTP id u10mr3884555wjz.213.1476874429679; Wed, 19 Oct 2016 03:53:49 -0700 (PDT) MIME-Version: 1.0 Received: by 10.28.152.150 with HTTP; Wed, 19 Oct 2016 03:53:19 -0700 (PDT) From: Gemma Gordon Date: Wed, 19 Oct 2016 11:53:19 +0100 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel@lists.xenproject.org Subject: [MirageOS-devel] MirageOS feedback and fortnightly catchup - Wednesday 19 October 4pm UK time (UTC+1) X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5618110015646363213==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============5618110015646363213== Content-Type: multipart/alternative; boundary=089e0102e3d0c2559a053f359f07 --089e0102e3d0c2559a053f359f07 Content-Type: text/plain; charset=UTF-8 Hi all, We'll be using IRC again so please join #mirage on Freenode. We would like to gather some feedback on the fortnightly calls/chats, so please fill out this *anonymous* form with your thoughts here: https://goo.gl/forms/NnNnk2JpD0ujbBoV2 by Monday 24th October. IRC logs from previous session are currently up at: *http://canopy.mirage.io/irclogs/05-10-2016 * and this session will also be logged at: http://canopy.mirage.io/irclogs The agenda for the meeting is at: https://github.com/mirage/mirage-www/wiki/Call-Agenda Please add items to the agenda to be discussed. Thanks, Gemma --089e0102e3d0c2559a053f359f07 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi all,

We'll be using IRC aga= in so please join #mirage=C2=A0on Freenode.

We would like to gather some feedback on the fortnightly calls/chats, so = please fill out this anonymous form with your thoughts here: https://goo.gl/forms/NnNnk2Jp= D0ujbBoV2=C2=A0by Monday 24th October.

IRC log= s from previous session are currently=C2=A0up=C2=A0= at:
http://canopy.mirage.io/irclogs/05-10-2016
and this session will also be logged at:
http://canopy.mirage.io/irclogs

The agenda for the meeting is at:
<= a href=3D"https://github.com/mirage/mirage-www/wiki/Call-Agenda" rel=3D"no= referrer" target=3D"_blank" style=3D"font-size:12.8px">https://github.com/= mirage/mirag= e-www/wiki/Call-Agenda

Please add items to the agenda to be discussed.

Thanks,
=

Gemma<= /div>

<= br>
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boundary="===============4962141332290562795==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============4962141332290562795== Content-Type: multipart/alternative; boundary=001a114070b2591ad8053f35a226 --001a114070b2591ad8053f35a226 Content-Type: text/plain; charset=UTF-8 On Wed, Oct 19, 2016 at 9:30 AM, Gemma Gordon wrote: > Hi all, > > I have spent a lot of time recently using Canopy for liveblogging various > Mirage-related events specifically ICFP and the Docker Distributed Systems > Summit. > > I'd like to thank Enguerrand Decorne for his help with Canopy, Anil > Madhavapeddy for his help in making it even easier to contribute to, Joel > Jakubovic, Ciaran Lawlor, Mindy Preston, and Olivier Nicole for all using > it during ICFP/OCaml workshop and CUFP, and also Gabriel Scherer for making > everyone aware of it and encouraging its use. We collectively covered 54 > talks that week, and you can see the liveblogs here: > > http://icfp2016.mirage.io/OCaml along with a summary post here: > > http://reynard.io/2016/10/19/icfp-2016-roundup.html (new blog under > construction!). > > I also made a few small changes to the mirage-canopy site to cover the > Docker summit: http://canopy.mirage.io/Liveblog and wrote summaries of > each talk plus Q&As. The focus of the summit was distributed systems, and > much of the work featured was open-source, OCaml-related, or relevant to > Mirage e.g. the TUF Framework: http://canopy.mirage.io/Liveblog/TUFDDS2016 > I wasn't able to go to the Docker summit but I found the notes very useful -- thanks for taking the time to create them! Cheers, Dave > > Thanks, > > Gemma > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > > --001a114070b2591ad8053f35a226 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Wed, Oct 19, 2016 at 9:30 AM, Gemma Gordon <<= a href=3D"mailto:gg417@cl.cam.ac.uk" target=3D"_blank">gg417@cl.cam.ac.uk<= /a>> wrote:
=
Hi all,
=

I have spent a lot of time recent= ly using Canopy for liveblogging various Mirage-related events specificall= y ICFP and the Docker Distributed Systems Summit.

I'd like to thank Enguerrand Decorne for = his help with Canopy, Anil Madhavapeddy for his help in making it even eas= ier to contribute to, Joel Jakubovic, Ciaran Lawlor, Mindy Preston, and Ol= ivier Nicole for all using it during ICFP/OCaml workshop and CUFP, and als= o Gabriel Scherer for making everyone aware of it and encouraging its use.= We collectively covered 54 talks that week, and you can see the liveblogs= here:=C2=A0
=
http://icfp2016.mirage= .io/OCaml along with a summary post here:

=
I also made a few small changes to the= mirage-canopy site to cover the Docker summit: http://canopy.mirage.io/Liveblog= and wrote summaries of each talk plus Q&As. The focus of the summ= it was distributed systems, and much of the work featured was open-source,= OCaml-related, or relevant to Mirage e.g. the TUF Framework: http://canop= y.mirage.io/Liveblog/TUFDDS2016

I wasn't able to go to the Docker summit but I= found the notes very useful -- thanks for taking the time to create them!=

Cheers,
Dave
=C2=A0

Thanks,

Gemma

_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@list= s.xenproject.org
https://lists.xenproject.org/<= wbr>cgi-bin/mailman/listinfo/mirageos-devel



--001a114070b2591ad8053f35a226-- --===============4962141332290562795== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============4962141332290562795==-- From mirageos-devel-bounces@lists.xenproject.org Wed Oct 19 10:54:38 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 19 Oct 2016 10:54:38 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwoW5-0001Tp-Vp; Wed, 19 Oct 2016 10:54:37 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwoW5-0001Ti-2a for mirageos-devel@lists.xenproject.org; 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boundary="===============4962141332290562795==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============4962141332290562795== Content-Type: multipart/alternative; boundary=001a114070b2591ad8053f35a226 --001a114070b2591ad8053f35a226 Content-Type: text/plain; charset=UTF-8 On Wed, Oct 19, 2016 at 9:30 AM, Gemma Gordon wrote: > Hi all, > > I have spent a lot of time recently using Canopy for liveblogging various > Mirage-related events specifically ICFP and the Docker Distributed Systems > Summit. > > I'd like to thank Enguerrand Decorne for his help with Canopy, Anil > Madhavapeddy for his help in making it even easier to contribute to, Joel > Jakubovic, Ciaran Lawlor, Mindy Preston, and Olivier Nicole for all using > it during ICFP/OCaml workshop and CUFP, and also Gabriel Scherer for making > everyone aware of it and encouraging its use. We collectively covered 54 > talks that week, and you can see the liveblogs here: > > http://icfp2016.mirage.io/OCaml along with a summary post here: > > http://reynard.io/2016/10/19/icfp-2016-roundup.html (new blog under > construction!). > > I also made a few small changes to the mirage-canopy site to cover the > Docker summit: http://canopy.mirage.io/Liveblog and wrote summaries of > each talk plus Q&As. The focus of the summit was distributed systems, and > much of the work featured was open-source, OCaml-related, or relevant to > Mirage e.g. the TUF Framework: http://canopy.mirage.io/Liveblog/TUFDDS2016 > I wasn't able to go to the Docker summit but I found the notes very useful -- thanks for taking the time to create them! Cheers, Dave > > Thanks, > > Gemma > > _______________________________________________ > MirageOS-devel mailing list > MirageOS-devel@lists.xenproject.org > https://lists.xenproject.org/cgi-bin/mailman/listinfo/mirageos-devel > > --001a114070b2591ad8053f35a226 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Wed, Oct 19, 2016 at 9:30 AM, Gemma Gordon <<= a href=3D"mailto:gg417@cl.cam.ac.uk" target=3D"_blank">gg417@cl.cam.ac.uk<= /a>> wrote:
=
Hi all,
=

I have spent a lot of time recent= ly using Canopy for liveblogging various Mirage-related events specificall= y ICFP and the Docker Distributed Systems Summit.

I'd like to thank Enguerrand Decorne for = his help with Canopy, Anil Madhavapeddy for his help in making it even eas= ier to contribute to, Joel Jakubovic, Ciaran Lawlor, Mindy Preston, and Ol= ivier Nicole for all using it during ICFP/OCaml workshop and CUFP, and als= o Gabriel Scherer for making everyone aware of it and encouraging its use.= We collectively covered 54 talks that week, and you can see the liveblogs= here:=C2=A0
=
http://icfp2016.mirage= .io/OCaml along with a summary post here:

=
I also made a few small changes to the= mirage-canopy site to cover the Docker summit: http://canopy.mirage.io/Liveblog= and wrote summaries of each talk plus Q&As. The focus of the summ= it was distributed systems, and much of the work featured was open-source,= OCaml-related, or relevant to Mirage e.g. the TUF Framework: http://canop= y.mirage.io/Liveblog/TUFDDS2016

I wasn't able to go to the Docker summit but I= found the notes very useful -- thanks for taking the time to create them!=

Cheers,
Dave
=C2=A0

Thanks,

Gemma

_______________________________________________
MirageOS-devel mailing list
MirageOS-devel@list= s.xenproject.org
https://lists.xenproject.org/<= wbr>cgi-bin/mailman/listinfo/mirageos-devel



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banners=-,-,- X-VirusChecked: Checked Received: (qmail 2744 invoked from network); 19 Oct 2016 15:57:05 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-2.tower-206.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 19 Oct 2016 15:57:05 -0000 Received: from bark.recoil.org (localhost [127.0.0.1]) by bark.recoil.org (OpenSMTPD) with ESMTP id 8753c702; Wed, 19 Oct 2016 16:57:04 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= selector1; bh=Pxtm4L3J8yyEToC32mK3ZZSD7Q8=; b=Ar2OfhvOV+ctKcl9Di ku6y9q5Xxzc3hcgJMh/BIEE7dwICCaoD9e6VSIUxVNzZd4ReM1NI6omIAXu3W5Uc pD3Qa969uG988+z35dgxo4SrZE6Ww9OPv0VqGcHfty5G11fq1f3xCtGtJFJ0bkeb CVHKLj5TqPhDVnU/lP7ZMVDJI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= selector1; b=K0o2wV/hI24aR4I2Wtn0P/Pr3LhCSnRZEK9UbCbQ8GsXzlJ45m1 78ZYkGlr8vAr/WtLtZSwkF0Km13SBSglZ9Y8lZ9c4bp/t9dAL13BeHEDmRtoVM4k U2dW0GSAOY6Myyx6yWxjLPCMj0Dpb2DAl2ns9bVE5CXmv21zmIb2B1i0= Received: from [172.16.10.155] (mail.astons-coaches.co.uk [194.72.166.2]) by bark.recoil.org (OpenSMTPD) with ESMTPSA id dc7bd1e1 (TLSv1:ECDHE-RSA-AES256-SHA:256:NO); Wed, 19 Oct 2016 16:57:04 +0100 (BST) Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Anil Madhavapeddy In-Reply-To: <20161019095654.GB18717@nodbug.lucina.net> Date: Wed, 19 Oct 2016 16:57:03 +0100 Message-Id: References: <20161019095654.GB18717@nodbug.lucina.net> To: Martin Lucina X-Mailer: Apple Mail (2.3124) Cc: Gemma Gordon , mirageos-devel Subject: Re: [MirageOS-devel] docs.mirage.io building again X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTkgT2N0IDIwMTYsIGF0IDEwOjU2LCBNYXJ0aW4gTHVjaW5hIDxtYXJ0aW5AbHVjaW5hLm5l dD4gd3JvdGU6Cj4gCj4gT24gRnJpZGF5LCAxNC4xMC4yMDE2IGF0IDExOjI5LCBBbmlsIE1hZGhh dmFwZWRkeSB3cm90ZToKPj4gR29vZCBuZXdzIGV2ZXJ5b25lISBUaGUgZXhwZXJpbWVudGFsIGRv Y3VtZW50YXRpb24gcmVwb3NpdG9yeSBhdCBodHRwOi8vZG9jcy5taXJhZ2UuaW8gbm93IGJ1aWxk cyBhZ2FpbiwgYW5kIGhhcyBiZWVuIHJlZnJlc2hlZCB0byB0aGUgbGF0ZXN0IHNldCBvZiBsaWJy YXJpZXMgYXNzZW1ibGVkIGZyb20gdGhlIE1pcmFnZU9TMyBkZXYgcmVtb3RlIGF0IGh0dHBzOi8v Z2l0aHViLmNvbS9taXJhZ2UvbWlyYWdlLWRldgo+IAo+IFNvbWUgaWRlYXMgZm9yIFVYIGltcHJv dmVtZW50cyB0byB0aGUgZG9jcyBwYWdlczoKPiAKPiAxKSBIeXBlcmxpbmtzIG9uIHR5cGVzLiBF Zy4gaW4gZnVuY3RvcmlhL0Z1bmN0b3JpYV9hcHAuQ21kLmh0bWwKPiAiUnJlc3VsdC5yZXN1bHQi IHNob3VsZCBsaW5rIHRvIHJyZXN1bHQvUnJlc3VsdC5odG1sLgo+IAo+IDIpIEEgIlBhdGgiIG5h Z2l2YXRpb24gaGVhZGVyIHdpdGggdGhlIGZ1bGwgaGllcmFyY2h5LiBFLmcuCj4gcnJlc3VsdC9S ZXN1bHQuaHRtbCBjdXJyZW50bHkgaGFzICJVcCIsIHdoaWNoIHRha2VzIG1lIHRvIHRoZSBwYWNr YWdlJ3MKPiBpbmRleC5wYWdlIGJ1dCBJIGNhbid0IGdvICJVcCIgZnJvbSB0aGVyZS4KPiAKPiAz KSBBICJTZWFyY2giIGJveCBvZiBzb21lIHNvcnQuIElkZWFsbHkganVzdCBjbGllbnQtc2lkZSwg c2VhcmNoIG92ZXIKPiBwYWNrYWdlcy9tb2R1bGVzL3R5cGVzL2Rlc2NyaXB0aW9ucz8KClRoYW5r cyBNYXJ0aW4hIEkndmUgdXBkYXRlZCB0aGUgdHJhY2tpbmcgaXNzdWUgYXQgaHR0cHM6Ly9naXRo dWIuY29tL21pcmFnZS9taXJhZ2UvaXNzdWVzLzYwOSBhbmQgZmlsZWQgYSBjb3VwbGUgb2YgdXBz dHJlYW0gaXNzdWVzIG9uIG9kaWcgYWJvdXQgdGhpcy4KCkknbSBub3QgcXVpdGUgc3VyZSB3aG8g d2lsbCBoYW5kbGUgc2VhcmNoIGFjcm9zcyBjbXQgZmlsZXMgeWV0LiAgSXMgdGhpcyBvbiB0aGUg cm9hZG1hcCBvciB3YW50LWxpc3QgZm9yIE1lcmxpbj8gKHRoaXMgcXVlc3Rpb24gaXMgbWFpbmx5 IGRpcmVjdGVkIGF0IEZyZWQgb3IgR2VtbWEsIHdobyBoYXZlIGJlZW4gbG9va2luZyBhdCB0aGUg TWVybGluIGZlYXR1cmUgcm9hZG1hcCByZWNlbnRseSkuCgpBbmlsCgpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpNaXJhZ2VPUy1kZXZlbCBtYWlsaW5nIGxp c3QKTWlyYWdlT1MtZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5w cm9qZWN0Lm9yZy9jZ2ktYmluL21haWxtYW4vbGlzdGluZm8vbWlyYWdlb3MtZGV2ZWwK From mirageos-devel-bounces@lists.xenproject.org Wed Oct 19 15:57:14 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 19 Oct 2016 15:57:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwtEs-0003Dr-AS; 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[209.85.213.53]) by smtp.gmail.com with ESMTPSA id g202sm13089528vkf.13.2016.10.19.11.38.11 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 19 Oct 2016 11:38:11 -0700 (PDT) Received: by mail-vk0-f53.google.com with SMTP id q126so38995622vkd.2 for ; Wed, 19 Oct 2016 11:38:11 -0700 (PDT) X-Received: by 10.31.189.67 with SMTP id n64mr6543428vkf.35.1476902291023; Wed, 19 Oct 2016 11:38:11 -0700 (PDT) MIME-Version: 1.0 Received: by 10.31.62.70 with HTTP; Wed, 19 Oct 2016 11:38:10 -0700 (PDT) From: Richard Mortier Date: Wed, 19 Oct 2016 19:38:10 +0100 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel Subject: [MirageOS-devel] ARM development X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" QWxsOwoKSSByZWNlbnRseSBzcGVudCBzb21lIHRpbWUgd29ya2luZyB0aHJvdWdoIElhbiBDYW1w YmVsbCdzIGV4Y2VsbGVudAp3b3JrIGZyb20gdGhlIHJlY2VudCBoYWNrYXRob24KKGh0dHBzOi8v Z2lzdC5naXRodWIuY29tL2lqYzI1LzYxMmI4Yjc5NzVlOTQ2MWMzNTg0YjE0MDJkZjJjYjM0KSwg dG8KcmVmaW5lIGFuZCBhdXRvbWF0ZSB0aGUgcHJvY2VzcyBzb21ld2hhdC4gVGhlIHJlc3VsdHMg YXJlIGF0Cmh0dHBzOi8vZ2l0aHViLmNvbS9tb3IxL2FybS1pbWFnZS1idWlsZGVyLCBub3cgaW4g ZmxpZ2h0IGFzIGEgUFIgdG8KYG1pcmFnZS94ZW4tYXJtLWJ1aWxkZXJgIGluCmh0dHBzOi8vZ2l0 aHViLmNvbS9taXJhZ2UveGVuLWFybS1idWlsZGVyL3B1bGwvNzEuCgpUaGUgc2NyaXB0cyB1c2Ug RG9ja2VyIGZvciBNYWMgKG9yLCBwcmVzdW1hYmx5LCBXaW5kb3dzIDopIHRvIGJ1aWxkIGFuCmlt YWdlIHN1aXRhYmxlIGZvciB3cml0aW5nIHRvIGFuIFNEIGNhcmQgdGhhdCB3aWxsIGJvb3QgYQpD dWJpZWJvYXJkMi9DdWJpZXRydWNrLiBUaGUgaW1hZ2UgcnVucyBBbHBpbmUgYW5kIHNjcmlwdHMg cHJvZHVjZWQKZHVyaW5nIGltYWdlIGNyZWF0aW9uIHdpbGwgaW5zdGFsbCBYZW4gd2l0aCBBbHBp bmUgYXMgYSBkb20wLCBhbmQgYWxzbwpwcm92aWRlIGZvciBwcm9kdWN0aW9uIG9mIGRvbVUgVk1z IGZvciBib3RoIEFscGluZSBhbmQgRGViaWFuLgoKSSdtIHN0aWxsIHdvcmtpbmcgb24gcmVmaW5p bmcgdGhlIHByb2Nlc3MsIHBhcnRpY3VsYXJseSB0byB0cnkgYW5kCnJlbW92ZSB0aGUgZmluYWwg bWFudWFsIGludGVydmVudGlvbnMgY3VycmVudGx5IHJlcXVpcmVkLCBidXQgZmlndXJlZAp3aGF0 J3MgdGhlcmUgbWlnaHQgYmUgb2YgdXNlIHRvIHNvbWUgYWxyZWFkeS4gSSd2ZSBhbHNvIGdvdCBh IGNvdXBsZQpvZiBwcmUtYnVpbHQgaW1hZ2VzIHRoYXQgSSdtIGhhcHB5IHRvIG1ha2UgYXZhaWxh YmxlIGJ1dCwgdG8gYmUgbmljZQp0byBvdXIgZGVwYXJ0bWVudGFsIHdlYiBzZXJ2ZXIsIEknZCBw cmVmZXIgbm90IHRvIHB1YmxpY2lzZSB0aGUgVVJMcwpmb3IgLS0gY29udGFjdCBtZSBvZmZsaW5l IGlmIHlvdSB3YW50IHRvIHRyeSB0aGVtLiAoT3IgSSBjYW4gcHV0IHRoZW0Kb24gYmxvYnMub3Bl bm1pcmFnZS5vcmcgaWYgc29tZW9uZSAtLSBAYXZzbT8gLS0gd2hvIGFkbWluaXN0ZXJzIHRoYXQK aG9zdCB3b3VsZCBsaWtlIHRvIHJlc3VycmVjdCBpdCA6KQoKQW55d2F5LS0gY29tbWVudHMgLyBQ UnMgd2VsY29tZSEKCi0tIApSaWNoYXJkIE1vcnRpZXIKcmljaGFyZC5tb3J0aWVyQGNsLmNhbS5h Yy51awoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWly YWdlT1MtZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qu b3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZv L21pcmFnZW9zLWRldmVsCg== From mirageos-devel-bounces@lists.xenproject.org Wed Oct 19 18:38:23 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Wed, 19 Oct 2016 18:38:23 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bwvkl-0004sJ-Vk; 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[209.85.213.53]) by smtp.gmail.com with ESMTPSA id g202sm13089528vkf.13.2016.10.19.11.38.11 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 19 Oct 2016 11:38:11 -0700 (PDT) Received: by mail-vk0-f53.google.com with SMTP id q126so38995622vkd.2 for ; Wed, 19 Oct 2016 11:38:11 -0700 (PDT) X-Received: by 10.31.189.67 with SMTP id n64mr6543428vkf.35.1476902291023; Wed, 19 Oct 2016 11:38:11 -0700 (PDT) MIME-Version: 1.0 Received: by 10.31.62.70 with HTTP; Wed, 19 Oct 2016 11:38:10 -0700 (PDT) From: Richard Mortier Date: Wed, 19 Oct 2016 19:38:10 +0100 X-Gmail-Original-Message-ID: Message-ID: To: mirageos-devel Subject: [MirageOS-devel] ARM development X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" QWxsOwoKSSByZWNlbnRseSBzcGVudCBzb21lIHRpbWUgd29ya2luZyB0aHJvdWdoIElhbiBDYW1w YmVsbCdzIGV4Y2VsbGVudAp3b3JrIGZyb20gdGhlIHJlY2VudCBoYWNrYXRob24KKGh0dHBzOi8v Z2lzdC5naXRodWIuY29tL2lqYzI1LzYxMmI4Yjc5NzVlOTQ2MWMzNTg0YjE0MDJkZjJjYjM0KSwg dG8KcmVmaW5lIGFuZCBhdXRvbWF0ZSB0aGUgcHJvY2VzcyBzb21ld2hhdC4gVGhlIHJlc3VsdHMg YXJlIGF0Cmh0dHBzOi8vZ2l0aHViLmNvbS9tb3IxL2FybS1pbWFnZS1idWlsZGVyLCBub3cgaW4g ZmxpZ2h0IGFzIGEgUFIgdG8KYG1pcmFnZS94ZW4tYXJtLWJ1aWxkZXJgIGluCmh0dHBzOi8vZ2l0 aHViLmNvbS9taXJhZ2UveGVuLWFybS1idWlsZGVyL3B1bGwvNzEuCgpUaGUgc2NyaXB0cyB1c2Ug RG9ja2VyIGZvciBNYWMgKG9yLCBwcmVzdW1hYmx5LCBXaW5kb3dzIDopIHRvIGJ1aWxkIGFuCmlt YWdlIHN1aXRhYmxlIGZvciB3cml0aW5nIHRvIGFuIFNEIGNhcmQgdGhhdCB3aWxsIGJvb3QgYQpD dWJpZWJvYXJkMi9DdWJpZXRydWNrLiBUaGUgaW1hZ2UgcnVucyBBbHBpbmUgYW5kIHNjcmlwdHMg cHJvZHVjZWQKZHVyaW5nIGltYWdlIGNyZWF0aW9uIHdpbGwgaW5zdGFsbCBYZW4gd2l0aCBBbHBp bmUgYXMgYSBkb20wLCBhbmQgYWxzbwpwcm92aWRlIGZvciBwcm9kdWN0aW9uIG9mIGRvbVUgVk1z IGZvciBib3RoIEFscGluZSBhbmQgRGViaWFuLgoKSSdtIHN0aWxsIHdvcmtpbmcgb24gcmVmaW5p bmcgdGhlIHByb2Nlc3MsIHBhcnRpY3VsYXJseSB0byB0cnkgYW5kCnJlbW92ZSB0aGUgZmluYWwg bWFudWFsIGludGVydmVudGlvbnMgY3VycmVudGx5IHJlcXVpcmVkLCBidXQgZmlndXJlZAp3aGF0 J3MgdGhlcmUgbWlnaHQgYmUgb2YgdXNlIHRvIHNvbWUgYWxyZWFkeS4gSSd2ZSBhbHNvIGdvdCBh IGNvdXBsZQpvZiBwcmUtYnVpbHQgaW1hZ2VzIHRoYXQgSSdtIGhhcHB5IHRvIG1ha2UgYXZhaWxh YmxlIGJ1dCwgdG8gYmUgbmljZQp0byBvdXIgZGVwYXJ0bWVudGFsIHdlYiBzZXJ2ZXIsIEknZCBw cmVmZXIgbm90IHRvIHB1YmxpY2lzZSB0aGUgVVJMcwpmb3IgLS0gY29udGFjdCBtZSBvZmZsaW5l IGlmIHlvdSB3YW50IHRvIHRyeSB0aGVtLiAoT3IgSSBjYW4gcHV0IHRoZW0Kb24gYmxvYnMub3Bl bm1pcmFnZS5vcmcgaWYgc29tZW9uZSAtLSBAYXZzbT8gLS0gd2hvIGFkbWluaXN0ZXJzIHRoYXQK aG9zdCB3b3VsZCBsaWtlIHRvIHJlc3VycmVjdCBpdCA6KQoKQW55d2F5LS0gY29tbWVudHMgLyBQ UnMgd2VsY29tZSEKCi0tIApSaWNoYXJkIE1vcnRpZXIKcmljaGFyZC5tb3J0aWVyQGNsLmNhbS5h Yy51awoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWly YWdlT1MtZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qu b3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZv L21pcmFnZW9zLWRldmVsCg== From mirageos-devel-bounces@lists.xenproject.org Thu Oct 20 23:36:08 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Thu, 20 Oct 2016 23:36:08 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bxMsK-0001ZS-Bl; 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q=dns; s= selector1; b=t1hSwBSEKLQalo0La8mzkkGlLeDBFbllbkDOeawwb4FahpUp62P kHftnMKbkKm18ijX9S4HZSN/DXR3vSp2Sm3DSpXLr03LR2dwquYhF0LjkXg+CMqI pmv9F1Zg9044QgoU1GGbjoY0MfGmA1r++p7sVo98zlFelUU0HAD5naJo= Received: from [172.16.10.57] (mail.astons-coaches.co.uk [194.72.166.2]) by bark.recoil.org (OpenSMTPD) with ESMTPSA id 71a43bd4 (TLSv1:ECDHE-RSA-AES256-SHA:256:NO); Fri, 21 Oct 2016 16:04:03 +0100 (BST) Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Anil Madhavapeddy In-Reply-To: Date: Fri, 21 Oct 2016 16:04:02 +0100 Message-Id: <96DD6101-F95B-47DD-B475-9994C026DF1F@recoil.org> References: <20161019095654.GB18717@nodbug.lucina.net> To: Martin Lucina X-Mailer: Apple Mail (2.3124) Cc: mirageos-devel , Gemma Gordon Subject: Re: [MirageOS-devel] docs.mirage.io building again X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTkgT2N0IDIwMTYsIGF0IDE2OjU3LCBBbmlsIE1hZGhhdmFwZWRkeSA8YW5pbEByZWNvaWwu b3JnPiB3cm90ZToKPiAKPiBPbiAxOSBPY3QgMjAxNiwgYXQgMTA6NTYsIE1hcnRpbiBMdWNpbmEg PG1hcnRpbkBsdWNpbmEubmV0PiB3cm90ZToKPj4gCj4+IE9uIEZyaWRheSwgMTQuMTAuMjAxNiBh dCAxMToyOSwgQW5pbCBNYWRoYXZhcGVkZHkgd3JvdGU6Cj4+PiBHb29kIG5ld3MgZXZlcnlvbmUh IFRoZSBleHBlcmltZW50YWwgZG9jdW1lbnRhdGlvbiByZXBvc2l0b3J5IGF0IGh0dHA6Ly9kb2Nz Lm1pcmFnZS5pbyBub3cgYnVpbGRzIGFnYWluLCBhbmQgaGFzIGJlZW4gcmVmcmVzaGVkIHRvIHRo ZSBsYXRlc3Qgc2V0IG9mIGxpYnJhcmllcyBhc3NlbWJsZWQgZnJvbSB0aGUgTWlyYWdlT1MzIGRl diByZW1vdGUgYXQgaHR0cHM6Ly9naXRodWIuY29tL21pcmFnZS9taXJhZ2UtZGV2Cj4+IAo+PiBT b21lIGlkZWFzIGZvciBVWCBpbXByb3ZlbWVudHMgdG8gdGhlIGRvY3MgcGFnZXM6Cj4+IAo+PiAx KSBIeXBlcmxpbmtzIG9uIHR5cGVzLiBFZy4gaW4gZnVuY3RvcmlhL0Z1bmN0b3JpYV9hcHAuQ21k Lmh0bWwKPj4gIlJyZXN1bHQucmVzdWx0IiBzaG91bGQgbGluayB0byBycmVzdWx0L1JyZXN1bHQu aHRtbC4KPj4gCj4+IDIpIEEgIlBhdGgiIG5hZ2l2YXRpb24gaGVhZGVyIHdpdGggdGhlIGZ1bGwg aGllcmFyY2h5LiBFLmcuCj4+IHJyZXN1bHQvUmVzdWx0Lmh0bWwgY3VycmVudGx5IGhhcyAiVXAi LCB3aGljaCB0YWtlcyBtZSB0byB0aGUgcGFja2FnZSdzCj4+IGluZGV4LnBhZ2UgYnV0IEkgY2Fu J3QgZ28gIlVwIiBmcm9tIHRoZXJlLgo+PiAKPj4gMykgQSAiU2VhcmNoIiBib3ggb2Ygc29tZSBz b3J0LiBJZGVhbGx5IGp1c3QgY2xpZW50LXNpZGUsIHNlYXJjaCBvdmVyCj4+IHBhY2thZ2VzL21v ZHVsZXMvdHlwZXMvZGVzY3JpcHRpb25zPwo+IAo+IFRoYW5rcyBNYXJ0aW4hIEkndmUgdXBkYXRl ZCB0aGUgdHJhY2tpbmcgaXNzdWUgYXQgaHR0cHM6Ly9naXRodWIuY29tL21pcmFnZS9taXJhZ2Uv aXNzdWVzLzYwOSBhbmQgZmlsZWQgYSBjb3VwbGUgb2YgdXBzdHJlYW0gaXNzdWVzIG9uIG9kaWcg YWJvdXQgdGhpcy4KCmh0dHA6Ly9kb2NzLm1pcmFnZS5pbyBpcyBub3cgcmVidWlsZGluZyBhZ2Fp biBhZnRlciB0aGUgbGF0ZXN0IHNldCBvZiBsaWJyYXJ5IG1lcmdlcyBhbmQgQVBJIGNoYW5nZXMu ICBUaGVyZSBpcyBzb21lIHRlbXBvcmFyeSBicmVha2FnZSBpbiB0aGUgb2RvYyBDU1MgdGhhdCBU aG9tYXMgUmVmaXMgYW5kIERhbmllbCBCdW56bGkgYXJlIHdvcmtpbmcgb24sIHNvIGp1c3QgdXNl IHRoZSBvY2FtbGRvYyB2ZXJzaW9uIGZvciBub3cuCgo+IEknbSBub3QgcXVpdGUgc3VyZSB3aG8g d2lsbCBoYW5kbGUgc2VhcmNoIGFjcm9zcyBjbXQgZmlsZXMgeWV0LiAgSXMgdGhpcyBvbiB0aGUg cm9hZG1hcCBvciB3YW50LWxpc3QgZm9yIE1lcmxpbj8gKHRoaXMgcXVlc3Rpb24gaXMgbWFpbmx5 IGRpcmVjdGVkIGF0IEZyZWQgb3IgR2VtbWEsIHdobyBoYXZlIGJlZW4gbG9va2luZyBhdCB0aGUg TWVybGluIGZlYXR1cmUgcm9hZG1hcCByZWNlbnRseSkuCgpBbmQgbG9va2luZyBhdCBzZWFyY2gg bW9yZSwgSSdtIHJlYXNvbmFibHkgc3VyZSB0aGF0IHRoaXMgd29uJ3QgaGFwcGVuIGluIHRoZSBz aG9ydCB0ZXJtIGZvciBkb2NzLm1pcmFnZS5pbyBpbiBvZG9jIC0tIHdlIHNob3VsZCBiZSBsb29r aW5nIGF0IHNvbWUgTWVybGluIG9yIEhvb2dsZS1saWtlIHNvbHV0aW9uLgoKQW5pbAoKCl9fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCk1pcmFnZU9TLWRldmVs IG1haWxpbmcgbGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpodHRwczov L2xpc3RzLnhlbnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1hbi9saXN0aW5mby9taXJhZ2Vvcy1k ZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Fri Oct 21 15:04:23 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Oct 2016 15:04:23 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bxbMf-0008AU-9B; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 25731 invoked from network); 21 Oct 2016 15:04:04 -0000 Received: from bark.recoil.org (HELO bark.recoil.org) (5.153.225.51) by server-2.tower-31.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 21 Oct 2016 15:04:04 -0000 Received: from bark.recoil.org (localhost [127.0.0.1]) by bark.recoil.org (OpenSMTPD) with ESMTP id 7aaa8a7e; Fri, 21 Oct 2016 16:04:03 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= selector1; bh=wxhR96oq+2kFjrd7XSRdlROycYU=; b=o5CGMFkAn1mTP04KIr wuIQigyw6cLqsPrcR3ggJiHm2+IfUO8eTE1X7BmpWrYEWRHim1YDtkZW5bI43Zje /aGU9NxsklXM3XbWMSpOyG/vkbh3MhBNpUA/BWffbi9S66Pvx7u+lGTEdge2VjB4 yY6vMK7hrSYZqx1ZWwxyIsVx4= DomainKey-Signature: a=rsa-sha1; c=nofws; d=recoil.org; h=content-type :mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= selector1; b=t1hSwBSEKLQalo0La8mzkkGlLeDBFbllbkDOeawwb4FahpUp62P kHftnMKbkKm18ijX9S4HZSN/DXR3vSp2Sm3DSpXLr03LR2dwquYhF0LjkXg+CMqI pmv9F1Zg9044QgoU1GGbjoY0MfGmA1r++p7sVo98zlFelUU0HAD5naJo= Received: from [172.16.10.57] (mail.astons-coaches.co.uk [194.72.166.2]) by bark.recoil.org (OpenSMTPD) with ESMTPSA id 71a43bd4 (TLSv1:ECDHE-RSA-AES256-SHA:256:NO); Fri, 21 Oct 2016 16:04:03 +0100 (BST) Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Anil Madhavapeddy In-Reply-To: Date: Fri, 21 Oct 2016 16:04:02 +0100 Message-Id: <96DD6101-F95B-47DD-B475-9994C026DF1F@recoil.org> References: <20161019095654.GB18717@nodbug.lucina.net> To: Martin Lucina X-Mailer: Apple Mail (2.3124) Cc: mirageos-devel , Gemma Gordon Subject: Re: [MirageOS-devel] docs.mirage.io building again X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" T24gMTkgT2N0IDIwMTYsIGF0IDE2OjU3LCBBbmlsIE1hZGhhdmFwZWRkeSA8YW5pbEByZWNvaWwu b3JnPiB3cm90ZToKPiAKPiBPbiAxOSBPY3QgMjAxNiwgYXQgMTA6NTYsIE1hcnRpbiBMdWNpbmEg PG1hcnRpbkBsdWNpbmEubmV0PiB3cm90ZToKPj4gCj4+IE9uIEZyaWRheSwgMTQuMTAuMjAxNiBh dCAxMToyOSwgQW5pbCBNYWRoYXZhcGVkZHkgd3JvdGU6Cj4+PiBHb29kIG5ld3MgZXZlcnlvbmUh IFRoZSBleHBlcmltZW50YWwgZG9jdW1lbnRhdGlvbiByZXBvc2l0b3J5IGF0IGh0dHA6Ly9kb2Nz Lm1pcmFnZS5pbyBub3cgYnVpbGRzIGFnYWluLCBhbmQgaGFzIGJlZW4gcmVmcmVzaGVkIHRvIHRo ZSBsYXRlc3Qgc2V0IG9mIGxpYnJhcmllcyBhc3NlbWJsZWQgZnJvbSB0aGUgTWlyYWdlT1MzIGRl diByZW1vdGUgYXQgaHR0cHM6Ly9naXRodWIuY29tL21pcmFnZS9taXJhZ2UtZGV2Cj4+IAo+PiBT b21lIGlkZWFzIGZvciBVWCBpbXByb3ZlbWVudHMgdG8gdGhlIGRvY3MgcGFnZXM6Cj4+IAo+PiAx KSBIeXBlcmxpbmtzIG9uIHR5cGVzLiBFZy4gaW4gZnVuY3RvcmlhL0Z1bmN0b3JpYV9hcHAuQ21k Lmh0bWwKPj4gIlJyZXN1bHQucmVzdWx0IiBzaG91bGQgbGluayB0byBycmVzdWx0L1JyZXN1bHQu aHRtbC4KPj4gCj4+IDIpIEEgIlBhdGgiIG5hZ2l2YXRpb24gaGVhZGVyIHdpdGggdGhlIGZ1bGwg aGllcmFyY2h5LiBFLmcuCj4+IHJyZXN1bHQvUmVzdWx0Lmh0bWwgY3VycmVudGx5IGhhcyAiVXAi LCB3aGljaCB0YWtlcyBtZSB0byB0aGUgcGFja2FnZSdzCj4+IGluZGV4LnBhZ2UgYnV0IEkgY2Fu J3QgZ28gIlVwIiBmcm9tIHRoZXJlLgo+PiAKPj4gMykgQSAiU2VhcmNoIiBib3ggb2Ygc29tZSBz b3J0LiBJZGVhbGx5IGp1c3QgY2xpZW50LXNpZGUsIHNlYXJjaCBvdmVyCj4+IHBhY2thZ2VzL21v ZHVsZXMvdHlwZXMvZGVzY3JpcHRpb25zPwo+IAo+IFRoYW5rcyBNYXJ0aW4hIEkndmUgdXBkYXRl ZCB0aGUgdHJhY2tpbmcgaXNzdWUgYXQgaHR0cHM6Ly9naXRodWIuY29tL21pcmFnZS9taXJhZ2Uv aXNzdWVzLzYwOSBhbmQgZmlsZWQgYSBjb3VwbGUgb2YgdXBzdHJlYW0gaXNzdWVzIG9uIG9kaWcg YWJvdXQgdGhpcy4KCmh0dHA6Ly9kb2NzLm1pcmFnZS5pbyBpcyBub3cgcmVidWlsZGluZyBhZ2Fp biBhZnRlciB0aGUgbGF0ZXN0IHNldCBvZiBsaWJyYXJ5IG1lcmdlcyBhbmQgQVBJIGNoYW5nZXMu ICBUaGVyZSBpcyBzb21lIHRlbXBvcmFyeSBicmVha2FnZSBpbiB0aGUgb2RvYyBDU1MgdGhhdCBU aG9tYXMgUmVmaXMgYW5kIERhbmllbCBCdW56bGkgYXJlIHdvcmtpbmcgb24sIHNvIGp1c3QgdXNl IHRoZSBvY2FtbGRvYyB2ZXJzaW9uIGZvciBub3cuCgo+IEknbSBub3QgcXVpdGUgc3VyZSB3aG8g d2lsbCBoYW5kbGUgc2VhcmNoIGFjcm9zcyBjbXQgZmlsZXMgeWV0LiAgSXMgdGhpcyBvbiB0aGUg cm9hZG1hcCBvciB3YW50LWxpc3QgZm9yIE1lcmxpbj8gKHRoaXMgcXVlc3Rpb24gaXMgbWFpbmx5 IGRpcmVjdGVkIGF0IEZyZWQgb3IgR2VtbWEsIHdobyBoYXZlIGJlZW4gbG9va2luZyBhdCB0aGUg TWVybGluIGZlYXR1cmUgcm9hZG1hcCByZWNlbnRseSkuCgpBbmQgbG9va2luZyBhdCBzZWFyY2gg bW9yZSwgSSdtIHJlYXNvbmFibHkgc3VyZSB0aGF0IHRoaXMgd29uJ3QgaGFwcGVuIGluIHRoZSBz aG9ydCB0ZXJtIGZvciBkb2NzLm1pcmFnZS5pbyBpbiBvZG9jIC0tIHdlIHNob3VsZCBiZSBsb29r aW5nIGF0IHNvbWUgTWVybGluIG9yIEhvb2dsZS1saWtlIHNvbHV0aW9uLgoKQW5pbAoKCl9fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCk1pcmFnZU9TLWRldmVs IG1haWxpbmcgbGlzdApNaXJhZ2VPUy1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpodHRwczov L2xpc3RzLnhlbnByb2plY3Qub3JnL2NnaS1iaW4vbWFpbG1hbi9saXN0aW5mby9taXJhZ2Vvcy1k ZXZlbAo= From mirageos-devel-bounces@lists.xenproject.org Fri Oct 21 15:18:56 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 21 Oct 2016 15:18:56 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bxbaw-0000cF-Tz; 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boundary="===============1744170723522430106==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============1744170723522430106== Content-Type: multipart/alternative; boundary=001a114b9b08db4bd4053f776dca --001a114b9b08db4bd4053f776dca Content-Type: text/plain; charset=UTF-8 Hello all! I'm looking for a way to start contributing to Mirage, I currently work as a Software Quality Engineer and have an extensive developer background, this is my github profile [1]. I've just begun learning OCaml and I'm really enjoying it so far. >From the list at [2] I'd be interested in looking at "tiny VM for easy load testing", please let me know if it's still needing help, if it's appropriate for a newbie and how to begin if so. Also "topkg porting" and "logging" seem appealing to me. Thanks! [1] https://github.com/fgimenez [2] http://canopy.mirage.io/tags/help%20needed -- Federico Gimenez +34 695 543 160 fgimenez@coit.es --001a114b9b08db4bd4053f776dca Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hello all!

=
I'm looking for a way to start c= ontributing to Mirage, I currently work as a Software Quality=C2=A0Enginee= r and have an=C2=A0extensive developer background, this is my github profi= le [1]. I've just begun learning OCaml and I'm really enjoying it = so far.

From the list at [2] I'd be interested in looking at &quo= t;tiny VM for easy load testing", please let me know if it's stil= l needing=C2=A0help, if it's appropriate for a newbie and how to begin= if so. Also "topkg porting" and "logging" seem appeal= ing to me.

Thanks!


--
Federico Gimenez<= /div>
+34 695 543 160
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I'm looking for a way to start contributing to Mirage, I currently work as a Software Quality Engineer and have an extensive developer background, this is my github profile [1]. I've just begun learning OCaml and I'm really enjoying it so far. >From the list at [2] I'd be interested in looking at "tiny VM for easy load testing", please let me know if it's still needing help, if it's appropriate for a newbie and how to begin if so. Also "topkg porting" and "logging" seem appealing to me. Thanks! [1] https://github.com/fgimenez [2] http://canopy.mirage.io/tags/help%20needed -- Federico Gimenez +34 695 543 160 fgimenez@coit.es --001a114b9b08db4bd4053f776dca Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hello all!

=
I'm looking for a way to start c= ontributing to Mirage, I currently work as a Software Quality=C2=A0Enginee= r and have an=C2=A0extensive developer background, this is my github profi= le [1]. I've just begun learning OCaml and I'm really enjoying it = so far.

From the list at [2] I'd be interested in looking at &quo= t;tiny VM for easy load testing", please let me know if it's stil= l needing=C2=A0help, if it's appropriate for a newbie and how to begin= if so. Also "topkg porting" and "logging" seem appeal= ing to me.

Thanks!


--
Federico Gimenez<= /div>
+34 695 543 160
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banners=-,-,- X-VirusChecked: Checked Received: (qmail 30978 invoked from network); 23 Oct 2016 21:37:58 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-7.tower-27.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 23 Oct 2016 21:37:58 -0000 Received: from [192.168.178.68] (p5B2C5D43.dip0.t-ipconnect.de [91.44.93.67]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id E28EE395B for ; Sun, 23 Oct 2016 23:37:57 +0200 (CEST) To: mirageos-devel From: Hannes Mehnert Message-ID: <2784a748-aceb-e574-2b1c-7d092999c98c@mehnert.org> Date: Sun, 23 Oct 2016 23:37:14 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 Subject: [MirageOS-devel] syslog reporter X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============3117597238219722892==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============3117597238219722892== Content-Type: multipart/signed; micalg=pgp-sha384; protocol="application/pgp-signature"; boundary="QLcmx2rDvwFoEiUpiVR7ShbVMG2ckGeHV" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --QLcmx2rDvwFoEiUpiVR7ShbVMG2ckGeHV Content-Type: multipart/mixed; boundary="dRvgdsHEdaeIk6rWJHvll9W51Ij034Lqt" From: Hannes Mehnert To: mirageos-devel Message-ID: <2784a748-aceb-e574-2b1c-7d092999c98c@mehnert.org> Subject: syslog reporter --dRvgdsHEdaeIk6rWJHvll9W51Ij034Lqt Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable hello, since the bits and pieces were already in place (thanks to various contributors), I implemented a syslog reporter [0] for the logs library [1= ]. I wrote the same functionality in pure Unix (with no dependencies apart from syslog-message[2], result, ptime, and logs) using UDP and TCP as transport, Lwt using UDP, TCP and TLS (including mutual authentication!) as transport, and MirageOS using UDP, TCP and TLS as transport. The MirageOS bits are developed against the current mirage-dev repository. To preserve proper layering, syslog does not resolve any hostnames using DNS. The idea of the reporter is that you create and register it as the logs reporter, and it manages its own TCP/TLS stream (in UDP it uses sendto) - if the connection is terminated for some reason, attempts are done to re-establish a new connection (might should do exponential backoff timers). On error while re-connecting, log messages are printed on standard error. I tested interoperability with syslogd via UDP, nc via TCP, and openssl s_server for the TLS bits. I encountered a resource leakage - the TCP/TLS stream is never closed. On program exit this should not be an issue (the kernel cleans that up anyways), but in the case that another reporter is registered via {!Logs.set_reporter}, I'd like to close the TCP/TLS stream (but there is no way AFAICS). It was an interesting experience to use the three different effectful libraries for the same problem. Turns out, Unix is the most straightforward since it uses only exceptions, whereas in Lwt there is need for Lwt.catch all over the place. MirageOS lacks the ability to print error messages in a uniform way (but we are aware of that and are in the process of fixing it). Look at the code yourself. Integration into the mirage tool itself is not yet done (shouldn't be too hard) - my idea is to not buffer any messages and send those from bootup to the log host once we have a UDP layer, but just start sending syslog messages once we have a UDP/TCP/TLS layer and print the previous ones to a potential console. Another action item would be to get RFC5424 syslog format (first in syslog-message[2]). Constructive feedback is as usual welcome (e.g. can I recover sanely from any other socket error apart from EAGAIN? should I have a catchall for exceptions while calling Unix/Lwt_unix.send/to (it would be bad for logs-syslog to kill the entire application only because some send failed)?= ), hannes 0: https://hannesm.github.io/logs-syslog/doc/Logs_syslog.html repository: https://github.com/hannesm/logs-syslog example code for lwt/unix/lwt-tls at the bottom of the individual files example unikernel https://github.com/hannesm/logs-syslog/tree/master/example 1: http://erratique.ch/software/logs 2: https://github.com/verbosemode/syslog-message --dRvgdsHEdaeIk6rWJHvll9W51Ij034Lqt-- --QLcmx2rDvwFoEiUpiVR7ShbVMG2ckGeHV Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCQAGBQJYDS2OAAoJELyJZYjffCjuE+YP/2MkpguMLNEFAgvOcKsky2YR MP19qEwXRbD911WlU1vUEuWMHC0JFnOdAxE7KnfV/gmA3yV+sEEKOkSBLLu8Ml0j sxtAttWbw5aafQqNkWE24R1Dtl6H8mcJdKJCbLbjz6I4D8No4zpZ0yPsWum7ZAKN i4zul28o09/I01wA24PR1rUaL8mLvAmH9QRuOiYrQkPArsSHsEGT3uFh2c3PrrYT 9PF7gqnxarSmUc70u5qNLziRI0kQFWr8+4lH/JCsr3W+5KSg6NvQhQ3e5uZ/Uv7E rqH0uQiyK1P8G9ugHx+zpICW8TcbSUEcvBcaRd0Se+SnrfOX7GtZDKzH+7WYMAq7 H87jB7Rw1WXpeJ/qKSS53Nkpomp0ytwJrgmJQf9MG++I/HOTaewgvstMz7MgHnoz o204OJI8Ay+hmxi7NpHOMv/N7scydwSLzcg4DgNqOiu4ypeVOZ/u5vcoOc2nsUaU eWDwYzr5xh9lGNxB5p3Qlk1OFeZQ1KmIRpKyuv4Jta85b3qhuOml81zXFuqkBYKC MC8ojMymxLiJxaC6oR7oZFnvbuEB3O4AeoT9BTdhSQLU9obeaRCwKmj4pmCWb0bY wpwToEXuMbiA/dEJIDqj4eCPPTmkEepmh42KdvcoD0mMUfA4ufTSYEQ4NBN1SiGb EVU4zK7/sSu3uBfRVco/ =j6Xd -----END PGP SIGNATURE----- --QLcmx2rDvwFoEiUpiVR7ShbVMG2ckGeHV-- --===============3117597238219722892== Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 30978 invoked from network); 23 Oct 2016 21:37:58 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-7.tower-27.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 23 Oct 2016 21:37:58 -0000 Received: from [192.168.178.68] (p5B2C5D43.dip0.t-ipconnect.de [91.44.93.67]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id E28EE395B for ; Sun, 23 Oct 2016 23:37:57 +0200 (CEST) To: mirageos-devel From: Hannes Mehnert Message-ID: <2784a748-aceb-e574-2b1c-7d092999c98c@mehnert.org> Date: Sun, 23 Oct 2016 23:37:14 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 Subject: [MirageOS-devel] syslog reporter X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============3117597238219722892==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --===============3117597238219722892== Content-Type: multipart/signed; micalg=pgp-sha384; protocol="application/pgp-signature"; boundary="QLcmx2rDvwFoEiUpiVR7ShbVMG2ckGeHV" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --QLcmx2rDvwFoEiUpiVR7ShbVMG2ckGeHV Content-Type: multipart/mixed; boundary="dRvgdsHEdaeIk6rWJHvll9W51Ij034Lqt" From: Hannes Mehnert To: mirageos-devel Message-ID: <2784a748-aceb-e574-2b1c-7d092999c98c@mehnert.org> Subject: syslog reporter --dRvgdsHEdaeIk6rWJHvll9W51Ij034Lqt Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable hello, since the bits and pieces were already in place (thanks to various contributors), I implemented a syslog reporter [0] for the logs library [1= ]. I wrote the same functionality in pure Unix (with no dependencies apart from syslog-message[2], result, ptime, and logs) using UDP and TCP as transport, Lwt using UDP, TCP and TLS (including mutual authentication!) as transport, and MirageOS using UDP, TCP and TLS as transport. The MirageOS bits are developed against the current mirage-dev repository. To preserve proper layering, syslog does not resolve any hostnames using DNS. The idea of the reporter is that you create and register it as the logs reporter, and it manages its own TCP/TLS stream (in UDP it uses sendto) - if the connection is terminated for some reason, attempts are done to re-establish a new connection (might should do exponential backoff timers). On error while re-connecting, log messages are printed on standard error. I tested interoperability with syslogd via UDP, nc via TCP, and openssl s_server for the TLS bits. I encountered a resource leakage - the TCP/TLS stream is never closed. On program exit this should not be an issue (the kernel cleans that up anyways), but in the case that another reporter is registered via {!Logs.set_reporter}, I'd like to close the TCP/TLS stream (but there is no way AFAICS). It was an interesting experience to use the three different effectful libraries for the same problem. Turns out, Unix is the most straightforward since it uses only exceptions, whereas in Lwt there is need for Lwt.catch all over the place. MirageOS lacks the ability to print error messages in a uniform way (but we are aware of that and are in the process of fixing it). Look at the code yourself. Integration into the mirage tool itself is not yet done (shouldn't be too hard) - my idea is to not buffer any messages and send those from bootup to the log host once we have a UDP layer, but just start sending syslog messages once we have a UDP/TCP/TLS layer and print the previous ones to a potential console. Another action item would be to get RFC5424 syslog format (first in syslog-message[2]). Constructive feedback is as usual welcome (e.g. can I recover sanely from any other socket error apart from EAGAIN? should I have a catchall for exceptions while calling Unix/Lwt_unix.send/to (it would be bad for logs-syslog to kill the entire application only because some send failed)?= ), hannes 0: https://hannesm.github.io/logs-syslog/doc/Logs_syslog.html repository: https://github.com/hannesm/logs-syslog example code for lwt/unix/lwt-tls at the bottom of the individual files example unikernel https://github.com/hannesm/logs-syslog/tree/master/example 1: http://erratique.ch/software/logs 2: https://github.com/verbosemode/syslog-message --dRvgdsHEdaeIk6rWJHvll9W51Ij034Lqt-- --QLcmx2rDvwFoEiUpiVR7ShbVMG2ckGeHV Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCQAGBQJYDS2OAAoJELyJZYjffCjuE+YP/2MkpguMLNEFAgvOcKsky2YR MP19qEwXRbD911WlU1vUEuWMHC0JFnOdAxE7KnfV/gmA3yV+sEEKOkSBLLu8Ml0j sxtAttWbw5aafQqNkWE24R1Dtl6H8mcJdKJCbLbjz6I4D8No4zpZ0yPsWum7ZAKN i4zul28o09/I01wA24PR1rUaL8mLvAmH9QRuOiYrQkPArsSHsEGT3uFh2c3PrrYT 9PF7gqnxarSmUc70u5qNLziRI0kQFWr8+4lH/JCsr3W+5KSg6NvQhQ3e5uZ/Uv7E rqH0uQiyK1P8G9ugHx+zpICW8TcbSUEcvBcaRd0Se+SnrfOX7GtZDKzH+7WYMAq7 H87jB7Rw1WXpeJ/qKSS53Nkpomp0ytwJrgmJQf9MG++I/HOTaewgvstMz7MgHnoz o204OJI8Ay+hmxi7NpHOMv/N7scydwSLzcg4DgNqOiu4ypeVOZ/u5vcoOc2nsUaU eWDwYzr5xh9lGNxB5p3Qlk1OFeZQ1KmIRpKyuv4Jta85b3qhuOml81zXFuqkBYKC MC8ojMymxLiJxaC6oR7oZFnvbuEB3O4AeoT9BTdhSQLU9obeaRCwKmj4pmCWb0bY wpwToEXuMbiA/dEJIDqj4eCPPTmkEepmh42KdvcoD0mMUfA4ufTSYEQ4NBN1SiGb EVU4zK7/sSu3uBfRVco/ =j6Xd -----END PGP SIGNATURE----- --QLcmx2rDvwFoEiUpiVR7ShbVMG2ckGeHV-- --===============3117597238219722892== Content-Type: text/plain; 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Mon, 24 Oct 2016 17:20:11 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: From: Mindy Message-ID: <0edc32ca-7f99-8a53-4cf4-ac81617af924@somerandomidiot.com> Date: Mon, 24 Oct 2016 10:20:10 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] Questions about contributing X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============8866560639354702296==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" This is a multi-part message in MIME format. --===============8866560639354702296== Content-Type: multipart/alternative; boundary="------------DD9316DA92AF7D750ED50295" This is a multi-part message in MIME format. --------------DD9316DA92AF7D750ED50295 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hi Federico! Responses are inline below. On 10/22/2016 12:23 PM, Federico Gimenez wrote: > Hello all! > > I'm looking for a way to start contributing to Mirage, I currently > work as a Software Quality Engineer and have an extensive developer > background, this is my github profile [1]. I've just begun learning > OCaml and I'm really enjoying it so far. This is really great to hear! :D > > From the list at [2] I'd be interested in looking at "tiny VM for easy > load testing", please let me know if it's still needing help, if it's > appropriate for a newbie and how to begin if so. Also "topkg porting" > and "logging" seem appealing to me. There's still a ton of work to be done converting libraries (1) to topkg and away from OASIS and (2) to use the Logs library instead of Console.log or printf. I did a bit of digging[1] in the package universe, and here's a small list of libraries that are still have an `_oasis` present in their root directory. The `opam` package name is listed first, then the repository where it lives: cstruct (https://github.com/mirage/ocaml-cstruct) crunch (https://github.com/mirage/ocaml-crunch) ipaddr (https://github.com/mirage/ocaml-ipaddr) qcow-format (https://github.com/mirage/ocaml-qcow) mirage-console-xen (https://github.com/mirage/mirage-console) (this repository has code for both the mirage-console-xen and mirage-console-unix packages) Converting things to topkg from oasis generally involves removing a bunch of autogenerated code and adding a small amount of structure around the invocation of topkg. topkg has documentation at http://erratique.ch/software/topkg , including a "menagerie" of examples at http://erratique.ch/software/topkg/doc/Topkg.html#menagerie . It's helpful to know a small amount about ocamlbuild (the build system that _oasis was autogenerating code to manage, and which topkg provides a simpler interface to) -- some documentation is available at https://nicolaspouillard.fr/ocamlbuild/ocamlbuild-user-guide.html . Logging's just seen a lot of activity over the past weekend! Probably verbosemode and hannesm can speak more to what might be valuable to look at immediately. Similarly, I think djs55 can speak better to what might make sense to look at alongside the "tiny vm for load testing" project. Thanks a lot for reaching out to the list! We're happy to hear from you. :) -Mindy [1] given a local copy of `opam-repository`, find packages which have at least one release with `org:mirage` mentioned somewhere in their `opam` file; for each such package, `opam source --dev-repo` to download the current trunk version and look for an `_oasis` there; use human brain to choose active projects which don't currently have someone topkging them --------------DD9316DA92AF7D750ED50295 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit

Hi Federico!

Responses are inline below.

On 10/22/2016 12:23 PM, Federico Gimenez wrote:
Hello all!

I'm looking for a way to start contributing to Mirage, I currently work as a Software Quality Engineer and have an extensive developer background, this is my github profile [1]. I've just begun learning OCaml and I'm really enjoying it so far.

This is really great to hear! :D

From the list at [2] I'd be interested in looking at "tiny VM for easy load testing", please let me know if it's still needing help, if it's appropriate for a newbie and how to begin if so. Also "topkg porting" and "logging" seem appealing to me.

There's still a ton of work to be done converting libraries (1) to topkg and away from OASIS and (2) to use the Logs library instead of Console.log or printf.

I did a bit of digging[1] in the package universe, and here's a small list of libraries that are still have an `_oasis` present in their root directory.  The `opam` package name is listed first, then the repository where it lives:

cstruct (https://github.com/mirage/ocaml-cstruct)
crunch (https://github.com/mirage/ocaml-crunch)
ipaddr (https://github.com/mirage/ocaml-ipaddr)
qcow-format (https://github.com/mirage/ocaml-qcow)
mirage-console-xen (https://github.com/mirage/mirage-console) (this repository has code for both the mirage-console-xen and mirage-console-unix packages)

Converting things to topkg from oasis generally involves removing a bunch of autogenerated code and adding a small amount of structure around the invocation of topkg.  topkg has documentation at http://erratique.ch/software/topkg , including a "menagerie" of examples at http://erratique.ch/software/topkg/doc/Topkg.html#menagerie .  It's helpful to know a small amount about ocamlbuild (the build system that _oasis was autogenerating code to manage, and which topkg provides a simpler interface to) -- some documentation is available at https://nicolaspouillard.fr/ocamlbuild/ocamlbuild-user-guide.html .

Logging's just seen a lot of activity over the past weekend!  Probably verbosemode and hannesm can speak more to what might be valuable to look at immediately.

Similarly, I think djs55 can speak better to what might make sense to look at alongside the "tiny vm for load testing" project.

Thanks a lot for reaching out to the list!  We're happy to hear from you. :)

-Mindy

[1] given a local copy of `opam-repository`, find packages which have at least one release with `org:mirage` mentioned somewhere in their `opam` file; for each such package, `opam source --dev-repo` to download the current trunk version and look for an `_oasis` there; use human brain to choose active projects which don't currently have someone topkging them
--------------DD9316DA92AF7D750ED50295-- --===============8866560639354702296== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============8866560639354702296==-- From mirageos-devel-bounces@lists.xenproject.org Mon Oct 24 15:20:30 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 24 Oct 2016 15:20:30 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1byh2v-0002br-2Y; Mon, 24 Oct 2016 15:20:17 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1byh2u-0002bl-9a for mirageos-devel@lists.xenproject.org; Mon, 24 Oct 2016 15:20:16 +0000 Received: from [85.158.143.35] by server-9.bemta-6.messagelabs.com id DC/A1-28857-FA62E085; Mon, 24 Oct 2016 15:20:15 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrHIsWRWlGSWpSXmKPExsVy0237Ed11anw RBuufy1r0tt5lcWD0OPzhCksAYxRrZl5SfkUCa8bTnVuYCq7aVGzauJy1gfGHYRcjF4eQwANG iZ2d01i7GDk5JARsJE63LmWGSExlkri8rosdIiEv8WTRa0YQW0igkUniy7I6EFtYwEpi8tUJY HERAXWJZafuQ9UESNx9eAGslw0ovvh6HwuIzSvgJvHt7zawOIuAqsTM71fAFosKhEu8n7WQDa JGUOLkzCdg9ZwCgRIT+o6DxZkFQiUmNL1gmsDIPwtJ2SwkKQjbTGLe5ofMELa8xPa3c4BsDiB bTWJZqxJMuHnrbOYFjGyrGDWKU4vKUot0jcz0kooy0zNKchMzc3QNDcz0clOLixPTU3MSk4r1 kvNzNzECw5kBCHYwnlkQeIhRkoNJSZR34UXeCCG+pPyUyozE4oz4otKc1OJDjDIcHEoSvMaqf BFCgkWp6akVaZk5wMiCSUtw8CiJ8IaApHmLCxJzizPTIVKnGBWlxHmDQBICIImM0jy4Nlg0X2 KUlRLmZQQ6RIinILUoN7MEVf4VozgHo5Iw7x8VoCk8mXklcNNfAS1mAlosGM8DsrgkESEl1cB o7jfzlMzRqhfPmBe4iU+sTv/FyftTY5NL8nE+yc2ZX266XLnuly4VouZpV2Elx7Mh+c5Mp6qk xadXxF0/sLXddB/LW+H1cS1uEbJloU6aeWcEcxRs37/sTj4/7/iz36oy2zot+OYeuvqPOUqou sVK+1G60IYHG4Xndi5zz80zYljqtea9k4MSS3FGoqEWc1FxIgCpcZBE4QIAAA== X-Env-Sender: mindy@somerandomidiot.com X-Msg-Ref: server-4.tower-21.messagelabs.com!1477322414!33595482!1 X-Originating-IP: [217.70.183.196] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMjE3LjcwLjE4My4xOTYgPT4gMzk1MTY=\n X-StarScan-Received: X-StarScan-Version: 9.0.13; banners=-,-,- X-VirusChecked: Checked Received: (qmail 40042 invoked from network); 24 Oct 2016 15:20:14 -0000 Received: from relay4-d.mail.gandi.net (HELO relay4-d.mail.gandi.net) (217.70.183.196) by server-4.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 24 Oct 2016 15:20:14 -0000 Received: from mfilter31-d.gandi.net (mfilter31-d.gandi.net [217.70.178.162]) by relay4-d.mail.gandi.net (Postfix) with ESMTP id E84B71720DD for ; Mon, 24 Oct 2016 17:20:13 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at mfilter31-d.gandi.net Received: from relay4-d.mail.gandi.net ([IPv6:::ffff:217.70.183.196]) by mfilter31-d.gandi.net (mfilter31-d.gandi.net [::ffff:10.0.15.180]) (amavisd-new, port 10024) with ESMTP id 2NeBTne-bA5F for ; Mon, 24 Oct 2016 17:20:12 +0200 (CEST) X-Originating-IP: 198.27.60.162 Received: from [10.137.3.11] (unknown [198.27.60.162]) (Authenticated sender: guybrush@somerandomidiot.com) by relay4-d.mail.gandi.net (Postfix) with ESMTPSA id CB4811720DB for ; Mon, 24 Oct 2016 17:20:11 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: From: Mindy Message-ID: <0edc32ca-7f99-8a53-4cf4-ac81617af924@somerandomidiot.com> Date: Mon, 24 Oct 2016 10:20:10 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: Subject: Re: [MirageOS-devel] Questions about contributing X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============8866560639354702296==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" This is a multi-part message in MIME format. --===============8866560639354702296== Content-Type: multipart/alternative; boundary="------------DD9316DA92AF7D750ED50295" This is a multi-part message in MIME format. --------------DD9316DA92AF7D750ED50295 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hi Federico! Responses are inline below. On 10/22/2016 12:23 PM, Federico Gimenez wrote: > Hello all! > > I'm looking for a way to start contributing to Mirage, I currently > work as a Software Quality Engineer and have an extensive developer > background, this is my github profile [1]. I've just begun learning > OCaml and I'm really enjoying it so far. This is really great to hear! :D > > From the list at [2] I'd be interested in looking at "tiny VM for easy > load testing", please let me know if it's still needing help, if it's > appropriate for a newbie and how to begin if so. Also "topkg porting" > and "logging" seem appealing to me. There's still a ton of work to be done converting libraries (1) to topkg and away from OASIS and (2) to use the Logs library instead of Console.log or printf. I did a bit of digging[1] in the package universe, and here's a small list of libraries that are still have an `_oasis` present in their root directory. The `opam` package name is listed first, then the repository where it lives: cstruct (https://github.com/mirage/ocaml-cstruct) crunch (https://github.com/mirage/ocaml-crunch) ipaddr (https://github.com/mirage/ocaml-ipaddr) qcow-format (https://github.com/mirage/ocaml-qcow) mirage-console-xen (https://github.com/mirage/mirage-console) (this repository has code for both the mirage-console-xen and mirage-console-unix packages) Converting things to topkg from oasis generally involves removing a bunch of autogenerated code and adding a small amount of structure around the invocation of topkg. topkg has documentation at http://erratique.ch/software/topkg , including a "menagerie" of examples at http://erratique.ch/software/topkg/doc/Topkg.html#menagerie . It's helpful to know a small amount about ocamlbuild (the build system that _oasis was autogenerating code to manage, and which topkg provides a simpler interface to) -- some documentation is available at https://nicolaspouillard.fr/ocamlbuild/ocamlbuild-user-guide.html . Logging's just seen a lot of activity over the past weekend! Probably verbosemode and hannesm can speak more to what might be valuable to look at immediately. Similarly, I think djs55 can speak better to what might make sense to look at alongside the "tiny vm for load testing" project. Thanks a lot for reaching out to the list! We're happy to hear from you. :) -Mindy [1] given a local copy of `opam-repository`, find packages which have at least one release with `org:mirage` mentioned somewhere in their `opam` file; for each such package, `opam source --dev-repo` to download the current trunk version and look for an `_oasis` there; use human brain to choose active projects which don't currently have someone topkging them --------------DD9316DA92AF7D750ED50295 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit

Hi Federico!

Responses are inline below.

On 10/22/2016 12:23 PM, Federico Gimenez wrote:
Hello all!

I'm looking for a way to start contributing to Mirage, I currently work as a Software Quality Engineer and have an extensive developer background, this is my github profile [1]. I've just begun learning OCaml and I'm really enjoying it so far.

This is really great to hear! :D

From the list at [2] I'd be interested in looking at "tiny VM for easy load testing", please let me know if it's still needing help, if it's appropriate for a newbie and how to begin if so. Also "topkg porting" and "logging" seem appealing to me.

There's still a ton of work to be done converting libraries (1) to topkg and away from OASIS and (2) to use the Logs library instead of Console.log or printf.

I did a bit of digging[1] in the package universe, and here's a small list of libraries that are still have an `_oasis` present in their root directory.  The `opam` package name is listed first, then the repository where it lives:

cstruct (https://github.com/mirage/ocaml-cstruct)
crunch (https://github.com/mirage/ocaml-crunch)
ipaddr (https://github.com/mirage/ocaml-ipaddr)
qcow-format (https://github.com/mirage/ocaml-qcow)
mirage-console-xen (https://github.com/mirage/mirage-console) (this repository has code for both the mirage-console-xen and mirage-console-unix packages)

Converting things to topkg from oasis generally involves removing a bunch of autogenerated code and adding a small amount of structure around the invocation of topkg.  topkg has documentation at http://erratique.ch/software/topkg , including a "menagerie" of examples at http://erratique.ch/software/topkg/doc/Topkg.html#menagerie .  It's helpful to know a small amount about ocamlbuild (the build system that _oasis was autogenerating code to manage, and which topkg provides a simpler interface to) -- some documentation is available at https://nicolaspouillard.fr/ocamlbuild/ocamlbuild-user-guide.html .

Logging's just seen a lot of activity over the past weekend!  Probably verbosemode and hannesm can speak more to what might be valuable to look at immediately.

Similarly, I think djs55 can speak better to what might make sense to look at alongside the "tiny vm for load testing" project.

Thanks a lot for reaching out to the list!  We're happy to hear from you. :)

-Mindy

[1] given a local copy of `opam-repository`, find packages which have at least one release with `org:mirage` mentioned somewhere in their `opam` file; for each such package, `opam source --dev-repo` to download the current trunk version and look for an `_oasis` there; use human brain to choose active projects which don't currently have someone topkging them
--------------DD9316DA92AF7D750ED50295-- --===============8866560639354702296== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============8866560639354702296==-- From mirageos-devel-bounces@lists.xenproject.org Mon Oct 24 15:27:40 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 24 Oct 2016 15:27:40 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1byhA3-0002oW-UI; Mon, 24 Oct 2016 15:27:39 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1byhA2-0002oM-Ey for mirageos-devel@lists.xenproject.org; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 39739 invoked from network); 24 Oct 2016 15:27:37 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-14.tower-27.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 24 Oct 2016 15:27:37 -0000 Received: from [192.168.178.68] (pD95763A2.dip0.t-ipconnect.de [217.87.99.162]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id A98131ECE for ; Mon, 24 Oct 2016 17:27:35 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: <0edc32ca-7f99-8a53-4cf4-ac81617af924@somerandomidiot.com> From: Hannes Mehnert Message-ID: <1c41398c-7799-1261-6b29-67155be07c31@mehnert.org> Date: Mon, 24 Oct 2016 17:26:55 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <0edc32ca-7f99-8a53-4cf4-ac81617af924@somerandomidiot.com> Subject: Re: [MirageOS-devel] Questions about contributing X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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banners=-,-,- X-VirusChecked: Checked Received: (qmail 39739 invoked from network); 24 Oct 2016 15:27:37 -0000 Received: from mail.mehnert.org (HELO mail.mehnert.org) (213.73.89.200) by server-14.tower-27.messagelabs.com with DHE-RSA-CAMELLIA256-SHA encrypted SMTP; 24 Oct 2016 15:27:37 -0000 Received: from [192.168.178.68] (pD95763A2.dip0.t-ipconnect.de [217.87.99.162]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (Client CN "hannes@mehnert.org", Issuer "mehnert root CA" (not verified)) by mail.mehnert.org (Postfix) with ESMTPS id A98131ECE for ; Mon, 24 Oct 2016 17:27:35 +0200 (CEST) To: mirageos-devel@lists.xenproject.org References: <0edc32ca-7f99-8a53-4cf4-ac81617af924@somerandomidiot.com> From: Hannes Mehnert Message-ID: <1c41398c-7799-1261-6b29-67155be07c31@mehnert.org> Date: Mon, 24 Oct 2016 17:26:55 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <0edc32ca-7f99-8a53-4cf4-ac81617af924@somerandomidiot.com> Subject: Re: [MirageOS-devel] Questions about contributing X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=fPxF+qiHUj+70xc1A394ZruD/wJcLK9/Zc6QgVaIZzs=; b=jkxbDcPvtlVrlFyccMo6cCp6Ib/wpMOapYrqcE8OoSh1rrtT2FsTWZ3WJNOwQlujRN b3sAk/4PM6lR2c6dJRvhKZD080Rbw7TioQ0iE8MQZGIsUKx1W7BZS6jUH/eZakgi1SxU vlNvimO7R0MmOAxviBJthzxy4f043nNi2d91U3Gzvic7QczuT31diaMJFvawq+TX7to/ KCjqEyg/A1QRrxADnos3NYSwebW+OR+jwEqeVLYwh5g3vO58V7sRmlIyXwe6N3vfcetV IKzAFVvR/zl/9UgITSu2U+6sfWvE+LknSy9E/xvwzTLREt9+WGSQkbDFxk6tvN92so0/ VxeQ== X-Gm-Message-State: ABUngvcMS4d8Zk0/wfrUFpl3yenP6PML+cpOjnqKgDZ/JFeWSSVWYlXUoQt8PHM5ypxdbH2r8pvtPrp4tul1kQ== X-Received: by 10.25.199.87 with SMTP id x84mr6720441lff.142.1477336809650; Mon, 24 Oct 2016 12:20:09 -0700 (PDT) MIME-Version: 1.0 Received: by 10.114.81.201 with HTTP; Mon, 24 Oct 2016 12:19:28 -0700 (PDT) In-Reply-To: <0edc32ca-7f99-8a53-4cf4-ac81617af924@somerandomidiot.com> References: <0edc32ca-7f99-8a53-4cf4-ac81617af924@somerandomidiot.com> From: Federico Gimenez Date: Mon, 24 Oct 2016 21:19:28 +0200 Message-ID: To: Mindy Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Questions about contributing X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============7289895033393508744==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============7289895033393508744== Content-Type: multipart/alternative; boundary=94eb2c1a19c8c0c106053fa1478d --94eb2c1a19c8c0c106053fa1478d Content-Type: text/plain; charset=UTF-8 Hey Mindy, thanks a lot for your response :) 2016-10-24 17:20 GMT+02:00 Mindy : > There's still a ton of work to be done converting libraries (1) to topkg > and away from OASIS and (2) to use the Logs library instead of Console.log > or printf. > > I did a bit of digging[1] in the package universe, and here's a small list > of libraries that are still have an `_oasis` present in their root > directory. The `opam` package name is listed first, then the repository > where it lives: > > cstruct (https://github.com/mirage/ocaml-cstruct) > crunch (https://github.com/mirage/ocaml-crunch) > ipaddr (https://github.com/mirage/ocaml-ipaddr) > qcow-format (https://github.com/mirage/ocaml-qcow) > mirage-console-xen (https://github.com/mirage/mirage-console) (this > repository has code for both the mirage-console-xen and mirage-console-unix > packages) > > Converting things to topkg from oasis generally involves removing a bunch > of autogenerated code and adding a small amount of structure around the > invocation of topkg. topkg has documentation at > http://erratique.ch/software/topkg , including a "menagerie" of examples > at http://erratique.ch/software/topkg/doc/Topkg.html#menagerie . It's > helpful to know a small amount about ocamlbuild (the build system that > _oasis was autogenerating code to manage, and which topkg provides a > simpler interface to) -- some documentation is available at > https://nicolaspouillard.fr/ocamlbuild/ocamlbuild-user-guide.html . > > This is really helpful, I'll start reading about the two packagers. Is this [1] a good example of the changes needed for the transition? Also, I guess that after making the modifications I should be able to generate the package and maybe install it locally but, are there any additional checks/testing in order to be sure that all went fine? > Logging's just seen a lot of activity over the past weekend! Probably > verbosemode and hannesm can speak more to what might be valuable to look at > immediately. > > Similarly, I think djs55 can speak better to what might make sense to look > at alongside the "tiny vm for load testing" project. > > Ok, thx for the pointers, I'll try to continue with them after I get my feet wet with topkg :) > Thanks a lot for reaching out to the list! We're happy to hear from you. > :) > > Thank you :) [1] https://github.com/mirage/mirage-bootvar-xen/commit/bfee b6cfb7851177eeba48c863bd2b56d381d1ac --94eb2c1a19c8c0c106053fa1478d Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hey Mindy, thanks a lot for your response :)

2016-10-24 17:20 GMT+02:00 Mi= ndy <mindy@somerandomidiot.com>:
=20 =20 =20

There's still a ton of work to be done converting libraries (1)= to topkg and away from OASIS and (2) to use the Logs library instead of Console.log or printf.


I did a bit of digging[1] in the package universe, and here's a small list of libraries that are still have an `_oasis` present in their root directory.=C2=A0 The `opam` package name is listed first, t= hen the repository where it lives:

cstruct (https://github.com/mirage/ocaml= -cstruct)
crunch (https://github.com/mirage/ocaml-c= runch)
ipaddr (https://github.com/mirage/ocaml-i= paddr)
qcow-format (https://github.com/mirage/ocam= l-qcow)
mirage-console-xen (https://github.com/mirag= e/mirage-console) (this repository has code for both the mirage-console-xen and mirage-console-unix packages)

Converting things to topkg from oasis generally involves removing a bunch of autogenerated code and adding a small amount of structure around the invocation of topkg.=C2=A0 topkg has documentation at http://erratique.ch/software/topkg , incl= uding a "menagerie" of examples at http://erratique.ch/softw= are/topkg/doc/Topkg.html#menagerie .=C2=A0 It's helpful to know a small amount about ocamlbuild (the build system that _oasis was autogenerating code to manage, and which topkg provides=20a simpler interface to) -- some documentation is available at https://nicolasp= ouillard.fr/ocamlbuild/ocamlbuild-user-guide.html .


This is really helpful, I&#= 39;ll start reading about the two packagers. Is this [1] a good example of= the changes needed for the transition? Also, I guess that after making th= e modifications I should be able to generate the package and maybe install= it locally but, are there any additional checks/testing in order to be su= re that all went fine?
=C2=A0
Logging's just seen a lot of activity over the past weekend!=C2=A0= Probably verbosemode and hannesm can speak=20more to what might be valuable to look at immediately.

Similarly, I think djs55 can speak better to what might make sense to look at alongside the "tiny vm for load testing" project.=


Ok, thx for the pointers, I= 'll try to continue with them after I get my feet wet with topkg :)

=C2=A0
Thanks a lot for reaching out to the list!=C2=A0 We're happy to he= ar from you. :)


Thank you :)

=

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boundary="===============7289895033393508744==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============7289895033393508744== Content-Type: multipart/alternative; boundary=94eb2c1a19c8c0c106053fa1478d --94eb2c1a19c8c0c106053fa1478d Content-Type: text/plain; charset=UTF-8 Hey Mindy, thanks a lot for your response :) 2016-10-24 17:20 GMT+02:00 Mindy : > There's still a ton of work to be done converting libraries (1) to topkg > and away from OASIS and (2) to use the Logs library instead of Console.log > or printf. > > I did a bit of digging[1] in the package universe, and here's a small list > of libraries that are still have an `_oasis` present in their root > directory. The `opam` package name is listed first, then the repository > where it lives: > > cstruct (https://github.com/mirage/ocaml-cstruct) > crunch (https://github.com/mirage/ocaml-crunch) > ipaddr (https://github.com/mirage/ocaml-ipaddr) > qcow-format (https://github.com/mirage/ocaml-qcow) > mirage-console-xen (https://github.com/mirage/mirage-console) (this > repository has code for both the mirage-console-xen and mirage-console-unix > packages) > > Converting things to topkg from oasis generally involves removing a bunch > of autogenerated code and adding a small amount of structure around the > invocation of topkg. topkg has documentation at > http://erratique.ch/software/topkg , including a "menagerie" of examples > at http://erratique.ch/software/topkg/doc/Topkg.html#menagerie . It's > helpful to know a small amount about ocamlbuild (the build system that > _oasis was autogenerating code to manage, and which topkg provides a > simpler interface to) -- some documentation is available at > https://nicolaspouillard.fr/ocamlbuild/ocamlbuild-user-guide.html . > > This is really helpful, I'll start reading about the two packagers. Is this [1] a good example of the changes needed for the transition? Also, I guess that after making the modifications I should be able to generate the package and maybe install it locally but, are there any additional checks/testing in order to be sure that all went fine? > Logging's just seen a lot of activity over the past weekend! Probably > verbosemode and hannesm can speak more to what might be valuable to look at > immediately. > > Similarly, I think djs55 can speak better to what might make sense to look > at alongside the "tiny vm for load testing" project. > > Ok, thx for the pointers, I'll try to continue with them after I get my feet wet with topkg :) > Thanks a lot for reaching out to the list! We're happy to hear from you. > :) > > Thank you :) [1] https://github.com/mirage/mirage-bootvar-xen/commit/bfee b6cfb7851177eeba48c863bd2b56d381d1ac --94eb2c1a19c8c0c106053fa1478d Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hey Mindy, thanks a lot for your response :)

2016-10-24 17:20 GMT+02:00 Mi= ndy <mindy@somerandomidiot.com>:
=20 =20 =20

There's still a ton of work to be done converting libraries (1)= to topkg and away from OASIS and (2) to use the Logs library instead of Console.log or printf.


I did a bit of digging[1] in the package universe, and here's a small list of libraries that are still have an `_oasis` present in their root directory.=C2=A0 The `opam` package name is listed first, t= hen the repository where it lives:

cstruct (https://github.com/mirage/ocaml= -cstruct)
crunch (https://github.com/mirage/ocaml-c= runch)
ipaddr (https://github.com/mirage/ocaml-i= paddr)
qcow-format (https://github.com/mirage/ocam= l-qcow)
mirage-console-xen (https://github.com/mirag= e/mirage-console) (this repository has code for both the mirage-console-xen and mirage-console-unix packages)

Converting things to topkg from oasis generally involves removing a bunch of autogenerated code and adding a small amount of structure around the invocation of topkg.=C2=A0 topkg has documentation at http://erratique.ch/software/topkg , incl= uding a "menagerie" of examples at http://erratique.ch/softw= are/topkg/doc/Topkg.html#menagerie .=C2=A0 It's helpful to know a small amount about ocamlbuild (the build system that _oasis was autogenerating code to manage, and which topkg provides=20a simpler interface to) -- some documentation is available at https://nicolasp= ouillard.fr/ocamlbuild/ocamlbuild-user-guide.html .


This is really helpful, I&#= 39;ll start reading about the two packagers. Is this [1] a good example of= the changes needed for the transition? Also, I guess that after making th= e modifications I should be able to generate the package and maybe install= it locally but, are there any additional checks/testing in order to be su= re that all went fine?
=C2=A0
Logging's just seen a lot of activity over the past weekend!=C2=A0= Probably verbosemode and hannesm can speak=20more to what might be valuable to look at immediately.

Similarly, I think djs55 can speak better to what might make sense to look at alongside the "tiny vm for load testing" project.=


Ok, thx for the pointers, I= 'll try to continue with them after I get my feet wet with topkg :)

=C2=A0
Thanks a lot for reaching out to the list!=C2=A0 We're happy to he= ar from you. :)


Thank you :)

=

--94eb2c1a19c8c0c106053fa1478d-- --===============7289895033393508744== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============7289895033393508744==-- From mirageos-devel-bounces@lists.xenproject.org Mon Oct 24 19:31:18 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Mon, 24 Oct 2016 19:31:18 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bykxo-0002eD-3X; Mon, 24 Oct 2016 19:31:16 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bykxm-0002e7-Q6 for mirageos-devel@lists.xenproject.org; Mon, 24 Oct 2016 19:31:14 +0000 Received: from [85.158.139.211] by server-11.bemta-5.messagelabs.com id EC/85-12614-2816E085; Mon, 24 Oct 2016 19:31:14 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrIIsWRWlGSWpSXmKPExsVyMfS6oW5DIl+ EwYkVNha9rXdZHBg9Dn+4whLAGMWamZeUX5HAmrFu8WymgtvKFU+nTmFvYNwl38XIxSEkMI9R Ytvxj6wgDotAA6tEx4l7LCCOhMAcVol/K0AynEBOjsSuC6eZIOwiiR3vFrKA2LwCghInZz4Bs 4UEvCXWNj1nBLE5BewlOl4dYoKI72eUOHS6FsRmEzCWeNPYxQ5iswioSmw/MoURYk6AxJXfO8 DmCAtYSUy+OgEsLiKgLnHiwX8wmxnIXr3xEROE7SUx99gd9gmMArOQnDELSWoWIwdYy/p5QhB hNYnb266yQ9jaEssWvmZewMi6ilGjOLWoLLVI19BcL6koMz2jJDcxM0fX0MBULze1uDgxPTUn MalYLzk/dxMjMKAZgGAH48XTnocYJTmYlER5TwXwRQjxJeWnVGYkFmfEF5XmpBYfYpTh4FCS4 NVNAMoJFqWmp1akZeYAYwsmLcHBoyTC2wqS5i0uSMwtzkyHSJ1iNObY8vvaWiaObVPvrWUSYs nLz0uVEue1BSkVACnNKM2DGwSL+UuMslLCvIxApwnxFKQW5WaWoMq/YhTnYFQS5q0GmcKTmVc Ct+8V0ClMQKcIxvOAnFKSiJCSamA0jGXteepgtqFtb83hjTvyo21yEj593Dp5+Xyfx2GKvwKz DUqTVxrOUkoL16pTauP7dHrmwZiKqxpbb/EkZIo8+b/2/1/XsoWrN9ll9zRF2E57dlbjfs28f SfTg1UvvBTsnjtzj0t9k0dF4T0jjs/NMk9a7DZN21qxI1M4r1NRpWIT+xXrrM9KLMUZiYZazE XFiQD2QgZx9AIAAA== X-Env-Sender: federico.gimenez@gmail.com X-Msg-Ref: server-11.tower-206.messagelabs.com!1477337472!54406560!1 X-Originating-IP: [209.85.215.49] X-SpamReason: No, hits=0.4 required=7.0 tests=HTML_50_60,HTML_MESSAGE, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 9.0.13; banners=-,-,- X-VirusChecked: Checked Received: (qmail 18196 invoked from network); 24 Oct 2016 19:31:12 -0000 Received: from mail-lf0-f49.google.com (HELO mail-lf0-f49.google.com) (209.85.215.49) by server-11.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 24 Oct 2016 19:31:12 -0000 Received: by mail-lf0-f49.google.com with SMTP id b75so201146825lfg.3 for ; Mon, 24 Oct 2016 12:31:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=WB96xclBUBgawBm0Omaej397sBbd7CkJMbc0kDCzdk0=; b=RFt5QaeaIDnRP+KglSD/te+Ir2bzhrgx8Mxp4bwJAKPykQZ7yR0yldmOeBwR5fN8X6 8JWbdsV4egJzHakqvrxzUx+F/S0eIE7+CgvFm3RSYbhrywTJw751Vc6c7+UEAY/5Lat+ PnNrd3Q6rxysgiYLoQ34vtQJYnMFlgemuiVVwgdkAnQiX8elegFa3+FLGf1qOazavQGX Pzo4ljIBng8CFLJbSdN6Kq8NBr/OpX3uOd5bsvVKznc1ko9hrFzlKZnZhdqPGZRy3UbS 9QoGoAb8Phur2+N1F543Qiki/++1Ii5s5gDwjU+XS76bBFSPZfSdgRn3zDGcS7JLdC7S 6J9A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=WB96xclBUBgawBm0Omaej397sBbd7CkJMbc0kDCzdk0=; b=hPc5nndShXtQEzjhFc4QVPKRkcFJGzzFqBRWSfgbigyVUgtHiaLP3KyaBwkZ7f2wYY D26TFXiLNBsntoC/OjtVhuxgPPmFdvYb+29CfzSS8wKsY1kDqk/0/klPVg0mgBLVXcnl 8Ie07pBNTBbuoFNf8Yq+j/phk7haX9w7u3QjnpHQPLIj3gha7C7LZNWR79m3JMjJYheJ p5sN8uTdxSotY7d9qDy1fkDxdbz5MEDNIi1n/z3Cu44Kwjx3q4kILklyYbmaJVeVLJu0 zXUbmn/NQwBdzDMfT6upx8WStmzfdbFsDj41DQzmhv9iBc+ND+BlOQR1t/7tkIfdi4CJ FB0Q== X-Gm-Message-State: ABUngvfJsWe4FPxjbLA4Vf3WGBpEYfYKvMcUa4wLN3YHAX6zZrEYjRvj2rqwATxKQDhIBFno3utb/T1mBKNl4w== X-Received: by 10.25.163.132 with SMTP id m126mr8327829lfe.9.1477337472213; Mon, 24 Oct 2016 12:31:12 -0700 (PDT) MIME-Version: 1.0 Received: by 10.114.81.201 with HTTP; Mon, 24 Oct 2016 12:30:31 -0700 (PDT) In-Reply-To: <1c41398c-7799-1261-6b29-67155be07c31@mehnert.org> References: <0edc32ca-7f99-8a53-4cf4-ac81617af924@somerandomidiot.com> <1c41398c-7799-1261-6b29-67155be07c31@mehnert.org> From: Federico Gimenez Date: Mon, 24 Oct 2016 21:30:31 +0200 Message-ID: To: Hannes Mehnert Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Questions about contributing X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============6881679296460732682==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============6881679296460732682== Content-Type: multipart/alternative; boundary=001a11411b1c3eaa11053fa16f08 --001a11411b1c3eaa11053fa16f08 Content-Type: text/plain; charset=UTF-8 Hey Hannes! 2016-10-24 17:26 GMT+02:00 Hannes Mehnert : > > It is. What are you interested in? Running MirageOS for _XXX_ (maybe > this XXX should be done by you, then) ;) > > Well, I'm primarily interested in learning about the internals of Mirage itself and OCaml of course, I'm just scratching the surface and would love to dig much deeper. Regarding practical usages, I'm currently more interested in Xen/ARM (no particular application) than other use cases, I would love to see a Dragonboard or pi3 running a web app unikernel, for instance, not sure if that's possible today or what would involve to be honest :) As mentioned on this list earlier, there's also > http://canopy.mirage.io/Projects/logging and > http://canopy.mirage.io/Projects/topkg (likely incomplete lists). I > consider the logging and topkg porting to be rather boring tasks not > very suitable for beginners because you don't learn much. > > In my case, given that I mostly know nothing that would be enough to begin with :) Mindy sent very useful and detailed info about topkg porting, I would like to begin with it. Rather jump into the cold water and implement a protocol or application > of your choice (graphql!?!). > > That sounds great! But scary too :p I can try to begin with it after topkg porting, what would be required in the graphql case, for instance? Thanks a bunch :) --001a11411b1c3eaa11053fa16f08 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hey Hannes!

2016-10-24 17:26 GMT+02:00 Hannes Mehnert &l= t;hannes@mehnert.o= rg>:
<= span class=3D"m_-731029074106844682gmail-m_2018147503120584661m_5225930715= 948989789gmail-">
It is.=C2=A0 What are you interested in?=C2=A0 Running MirageOS for= _XXX_ (maybe
this XXX should be done by you, then) ;)


Well, I'= m primarily interested in learning about the internals of Mirage itself an= d OCaml of course, I'm just scratching the surface and would love to d= ig much deeper.
Regarding practical usages, I'm currently mo= re interested in Xen/ARM (no particular application) than other use cases,= I would love to see a Dragonboard or pi3 running a web app unikernel, for= instance, not sure if that's possible today or what would involve to = be honest :)

As mentioned on this list earlier, there's also
http://canopy.mirage.io/Projects/logging and
http://canopy.mirage.io/Projects/topkg (likely inco= mplete lists).=C2=A0 I
consider the logging and topkg porting to be rather boring tasks not
very suitable for beginners because you don't learn much.


In my case, given that I mostly know = nothing that would be enough to begin with :) Mindy sent very useful and d= etailed info about topkg porting, I would like to begin with it.

Rather jump into the cold water and implement a protocol or application of your choice (graphql!?!).


That sounds = great! But scary too :p I can try to begin with it after topkg porting, wh= at would be required in the graphql case, for instance?

Thanks a bunch :)

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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=WB96xclBUBgawBm0Omaej397sBbd7CkJMbc0kDCzdk0=; b=hPc5nndShXtQEzjhFc4QVPKRkcFJGzzFqBRWSfgbigyVUgtHiaLP3KyaBwkZ7f2wYY D26TFXiLNBsntoC/OjtVhuxgPPmFdvYb+29CfzSS8wKsY1kDqk/0/klPVg0mgBLVXcnl 8Ie07pBNTBbuoFNf8Yq+j/phk7haX9w7u3QjnpHQPLIj3gha7C7LZNWR79m3JMjJYheJ p5sN8uTdxSotY7d9qDy1fkDxdbz5MEDNIi1n/z3Cu44Kwjx3q4kILklyYbmaJVeVLJu0 zXUbmn/NQwBdzDMfT6upx8WStmzfdbFsDj41DQzmhv9iBc+ND+BlOQR1t/7tkIfdi4CJ FB0Q== X-Gm-Message-State: ABUngvfJsWe4FPxjbLA4Vf3WGBpEYfYKvMcUa4wLN3YHAX6zZrEYjRvj2rqwATxKQDhIBFno3utb/T1mBKNl4w== X-Received: by 10.25.163.132 with SMTP id m126mr8327829lfe.9.1477337472213; Mon, 24 Oct 2016 12:31:12 -0700 (PDT) MIME-Version: 1.0 Received: by 10.114.81.201 with HTTP; Mon, 24 Oct 2016 12:30:31 -0700 (PDT) In-Reply-To: <1c41398c-7799-1261-6b29-67155be07c31@mehnert.org> References: <0edc32ca-7f99-8a53-4cf4-ac81617af924@somerandomidiot.com> <1c41398c-7799-1261-6b29-67155be07c31@mehnert.org> From: Federico Gimenez Date: Mon, 24 Oct 2016 21:30:31 +0200 Message-ID: To: Hannes Mehnert Cc: mirageos-devel@lists.xenproject.org Subject: Re: [MirageOS-devel] Questions about contributing X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============6881679296460732682==" Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" --===============6881679296460732682== Content-Type: multipart/alternative; boundary=001a11411b1c3eaa11053fa16f08 --001a11411b1c3eaa11053fa16f08 Content-Type: text/plain; charset=UTF-8 Hey Hannes! 2016-10-24 17:26 GMT+02:00 Hannes Mehnert : > > It is. What are you interested in? Running MirageOS for _XXX_ (maybe > this XXX should be done by you, then) ;) > > Well, I'm primarily interested in learning about the internals of Mirage itself and OCaml of course, I'm just scratching the surface and would love to dig much deeper. Regarding practical usages, I'm currently more interested in Xen/ARM (no particular application) than other use cases, I would love to see a Dragonboard or pi3 running a web app unikernel, for instance, not sure if that's possible today or what would involve to be honest :) As mentioned on this list earlier, there's also > http://canopy.mirage.io/Projects/logging and > http://canopy.mirage.io/Projects/topkg (likely incomplete lists). I > consider the logging and topkg porting to be rather boring tasks not > very suitable for beginners because you don't learn much. > > In my case, given that I mostly know nothing that would be enough to begin with :) Mindy sent very useful and detailed info about topkg porting, I would like to begin with it. Rather jump into the cold water and implement a protocol or application > of your choice (graphql!?!). > > That sounds great! But scary too :p I can try to begin with it after topkg porting, what would be required in the graphql case, for instance? Thanks a bunch :) --001a11411b1c3eaa11053fa16f08 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hey Hannes!

2016-10-24 17:26 GMT+02:00 Hannes Mehnert &l= t;hannes@mehnert.o= rg>:
<= span class=3D"m_-731029074106844682gmail-m_2018147503120584661m_5225930715= 948989789gmail-">
It is.=C2=A0 What are you interested in?=C2=A0 Running MirageOS for= _XXX_ (maybe
this XXX should be done by you, then) ;)


Well, I'= m primarily interested in learning about the internals of Mirage itself an= d OCaml of course, I'm just scratching the surface and would love to d= ig much deeper.
Regarding practical usages, I'm currently mo= re interested in Xen/ARM (no particular application) than other use cases,= I would love to see a Dragonboard or pi3 running a web app unikernel, for= instance, not sure if that's possible today or what would involve to = be honest :)

As mentioned on this list earlier, there's also
http://canopy.mirage.io/Projects/logging and
http://canopy.mirage.io/Projects/topkg (likely inco= mplete lists).=C2=A0 I
consider the logging and topkg porting to be rather boring tasks not
very suitable for beginners because you don't learn much.


In my case, given that I mostly know = nothing that would be enough to begin with :) Mindy sent very useful and d= etailed info about topkg porting, I would like to begin with it.

Rather jump into the cold water and implement a protocol or application of your choice (graphql!?!).


That sounds = great! But scary too :p I can try to begin with it after topkg porting, wh= at would be required in the graphql case, for instance?

Thanks a bunch :)

--001a11411b1c3eaa11053fa16f08-- --===============6881679296460732682== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTWlyYWdlT1Mt ZGV2ZWwgbWFpbGluZyBsaXN0Ck1pcmFnZU9TLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0 dHBzOi8vbGlzdHMueGVucHJvamVjdC5vcmcvY2dpLWJpbi9tYWlsbWFuL2xpc3RpbmZvL21pcmFn ZW9zLWRldmVsCg== --===============6881679296460732682==-- From mirageos-devel-bounces@lists.xenproject.org Fri Oct 28 12:55:13 2016 Return-path: Envelope-to: archives@lists.xenproject.org Delivery-date: Fri, 28 Oct 2016 12:55:13 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1c06gX-0006fU-W6; Fri, 28 Oct 2016 12:55:01 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1c06gW-0006fM-RL for 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<96DD6101-F95B-47DD-B475-9994C026DF1F@recoil.org> To: Nicolas Ojeda Bar X-Mailer: Apple Mail (2.3124) Cc: Martin Lucina , mirageos-devel , Gemma Gordon Subject: Re: [MirageOS-devel] docs.mirage.io building again X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" VGhhbmtzIGZvciB0aGUgcG9pbnRlciBOaWNvbGFzLCBJIGRpZG4ndCByZWFsaXNlIHRoYXQgd2Fz IHN0aWxsIHVuZGVyIGFjdGl2ZSBkZXZlbG9wbWVudCEgSG9va2luZyBpdCBpbnRvIG9kaWcgc2hv dWxkIGJlIGEgZnVuIGV4ZXJjaXNlLgoKQW4gdXBkYXRlIG9uIGRvY3MubWlyYWdlLmlvOgoKLSBp dCBpcyBub3cgYnVpbGRpbmcgYWdhaW4gYWZ0ZXIgdGhlIGxhdGVzdCBiYXRjaCBvZiBtaXJhZ2Uv bWlyYWdlLWRldiBjaGFuZ2VzLiAgVGhhbmtzIHRvIERhdmlkIEthbG9wZXIgZm9yIGxvdHMgb2Yg 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<96DD6101-F95B-47DD-B475-9994C026DF1F@recoil.org> To: Nicolas Ojeda Bar X-Mailer: Apple Mail (2.3124) Cc: Martin Lucina , mirageos-devel , Gemma Gordon Subject: Re: [MirageOS-devel] docs.mirage.io building again X-BeenThere: mirageos-devel@lists.xenproject.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Developer list for MirageOS List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: mirageos-devel-bounces@lists.xenproject.org Sender: "MirageOS-devel" VGhhbmtzIGZvciB0aGUgcG9pbnRlciBOaWNvbGFzLCBJIGRpZG4ndCByZWFsaXNlIHRoYXQgd2Fz IHN0aWxsIHVuZGVyIGFjdGl2ZSBkZXZlbG9wbWVudCEgSG9va2luZyBpdCBpbnRvIG9kaWcgc2hv dWxkIGJlIGEgZnVuIGV4ZXJjaXNlLgoKQW4gdXBkYXRlIG9uIGRvY3MubWlyYWdlLmlvOgoKLSBp dCBpcyBub3cgYnVpbGRpbmcgYWdhaW4gYWZ0ZXIgdGhlIGxhdGVzdCBiYXRjaCBvZiBtaXJhZ2Uv bWlyYWdlLWRldiBjaGFuZ2VzLiAgVGhhbmtzIHRvIERhdmlkIEthbG9wZXIgZm9yIGxvdHMgb2Yg 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