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[99.7.172.215]) by smtp.gmail.com with ESMTPSA id l1sm11445544pjb.28.2020.01.31.16.26.28 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 31 Jan 2020 16:26:28 -0800 (PST) To: Xen-users@lists.xen.org From: PGNet Dev Message-ID: <7b0d3565-7613-f4e4-8927-2b5eb48d0f9b@gmail.com> Date: Fri, 31 Jan 2020 16:26:25 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.2 MIME-Version: 1.0 Content-Language: en-US Subject: [Xen-users] =?utf-8?q?serial_console_to_Dom0_--_connection=2C_but?= =?utf-8?b?IG9ubHkgJ2dhcmJhZ2UnICjvv70gLCAncXVlc3Rpb24gbWFyaycpIG91dHB1?= =?utf-8?q?t=2E_config_wrong=3F?= X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Reply-To: pgnet.dev@gmail.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <35b8335f-69c6-79f9-3aca-47f199fcff21@gmail.com> Content-Language: en-US Subject: Re: [Xen-users] =?utf-8?q?serial_console_to_Dom0_--_connection=2C_bu?= =?utf-8?b?dCBvbmx5ICdnYXJiYWdlJyAo77+9ICwgJ3F1ZXN0aW9uIG1hcmsnKSBvdXRw?= =?utf-8?q?ut=2E_config_wrong=3F?= X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" T24gMS8zMS8yMCA1OjM5IFBNLCBQR05ldCBEZXYgd3JvdGU6Cj4gT24gMS8zMS8yMCA0OjQ1IFBN LCBTYXJhaCBOZXdtYW4gd3JvdGU6Cj4+IEJ1dCBpbiBuZXdlciB2ZXJzaW9ucyBvZiBYZW4gdGhl IHN5bnRheCB5b3UncmUgdXNpbmcgc2hvdWxkIGJlIHN1cHBvcnRlZC4gTG9va2luZyBhdCB0aGUg c291cmNlIGZpbGVzIGRvY3MvbWlzYy94ZW4tY29tbWFuZC1saW5lLnBhbmRvYyBhbmQgeGVuL2Ry aXZlcnMvY2hhci9uczE2NTUwLmMsIEkgdGhpbmsgdGhlcmUncyBhIHByb2JsZW0gd2l0aCBoeXBo ZW5zIHZlcnN1cyB1bmRlcnNjb3Jlcy4KPj4KPj4gVHJ5IGNoYW5naW5nIGlvX2Jhc2UgdG8gaW8t YmFzZSBpbiB5b3VyIGNvbW1hbmQgbGluZS4KPiAKPiBpIHdhcyBqdXN0IHBva2luZyBhdCB0aGF0 IG15c2VsZi4KPiAKPiBAIGh0dHBzOi8veGVuYml0cy54ZW4ub3JnL2RvY3MvNC4xMy10ZXN0aW5n L21pc2MveGVuLWNvbW1hbmQtbGluZS5odG1sI2NvbTEKPiAKPiBpdCBzYXlzCj4gCj4gIlRoZSBh Y2NlcHRlZCBuYW1lIGtleXdvcmRzIGZvciBuYW1lPXZhbHVlIHBhaXJzIGFyZToKPiAgICAgIC4u Lgo+ICAgICAgaW8tYmFzZSAtIGFjY2VwdHMgaW50ZWdlciB3aGljaCBzcGVjaWZpZWQgSU8gYmFz ZSBwb3J0IGZvciBVQVJUIHJlZ2lzdGVycwo+ICAgICAgLi4uCj4gIgo+IAo+IGkuZS4sIGh5cGhl bmF0ZWQuIHRoZW4sIGluIHRoZSBuZXh0IGNvbW1lbnQsCj4gCj4gCSIKPiAJVGhlIGZvbGxvd2lu ZyBhcmUgZXhhbXBsZXMgb2YgY29ycmVjdCBzcGVjaWZpY2F0aW9uczoKPiAJCj4gCWNvbTE9MTE1 MjAwLDhuMSwweDNmOCw0Cj4gCWNvbTE9MTE1MjAwLDhuMSwweDNmOCw0LHJlZ193aWR0aD00LHJl Z19zaGlmdD0yCj4gCWNvbTE9YmF1ZD0xMTUyMDAscGFyaXR5PW4sc3RvcF9iaXRzPTEsaW9fYmFz ZT0weDNmOCxyZWdfd2lkdGg9NAo+IAkiCj4gCj4gbm90ZSwgKmFsbCogdW5kZXJzY29yZXMgOi0v Cj4gCj4gSWYgSSB1c2UgdW5kZXJzY29yZXMsCj4gCj4gCWNvbTE9YmF1ZD0xMTUyMDAsZGF0YV9i aXRzPTgscGFyaXR5PW4sc3RvcF9iaXRzPTEsaW9fYmFzZT0weDAzZTgsaXJxPTMKPiAKPiB0aGUg L2Rldi90dHlTMiBkZXZpY2UgKmlzKiBkZWZpbmVkIGFuZCBwcm9iZWFibGUgb24gYm9vdC4KPiAK PiBPVE9ILCB3aXRoIGh5cGhlbnMsIHRoZXJlJ3Mgbm8gL2RldiBjcmVhdGVkLgo+IAo+IEhhdmVu J3QgeWV0IGZvdW5kIGFueSAqZXJyb3JzKiBhYnQgaXQgOi1TCj4gCj4gTmVlZCB0byB0YWtlIGEg bG9vayBhdCB0aGUgY29kZSBteXNlbGYgJiBtb25rZXkgd2l0aCBsb2dnaW5nIHRvIHVuZGVyc3Rh bmQgd2hhdCdzIHJpZ2h0Lgo+IAo+PiBJIGxvb2tlZCB1cCB0aGUgdHR5UzIgcG9ydCBhbmQgaXJx IHVzaW5nCj4+Cj4+ICQgY2F0IC9zeXMvY2xhc3MvdHR5L3R0eVMyL2RldmljZS9yZXNvdXJjZXMK Pj4gc3RhdGUgPSBhY3RpdmUKPiAKPiBoZXJlLAo+IAo+IAljYXQgL3N5cy9jbGFzcy90dHkvdHR5 UzIvZGV2aWNlL3Jlc291cmNlcwo+IAkJc3RhdGUgPSBhY3RpdmUKPiAJCWlvIDB4M2U4LTB4M2Vm Cj4gCQlpcnEgMwo+IAkJZG1hIGRpc2FibGVkCj4gCj4+IHNlcmlhbCAtLXVuaXQ9MiAtLXNwZWVk PTExNTIwMAo+PiB0ZXJtaW5hbF9pbnB1dCBzZXJpYWwgY29uc29sZQo+PiB0ZXJtaW5hbF9vdXRw dXQgc2VyaWFsIGNvbnNvbGUKPiAKPiBJIG1vZCdkICAvZXRjL2RlZmF1bHQvZ3J1YiB0bwo+IAo+ IAlHUlVCX1RFUk1JTkFMX0lOUFVUPSJzZXJpYWwgY29uc29sZSAiCj4gCUdSVUJfVEVSTUlOQUxf T1VUUFVUPSJzZXJpYWwgY29uc29sZSIKPiAJR1JVQl9TRVJJQUxfQ09NTUFORD0ic2VyaWFsIC0t dW5pdD0yIC0tc3BlZWQ9MTE1MjAwIgo+IAo+IGFuZCwgc3dpdGNoZWQgdG8gdGhlICdzaG9ydGhh bmQnLAo+IAo+IAlHUlVCX0NNRExJTkVfWEVOPSJjb20xPTExNTIwMCw4bjEsMHgwM2U4LDMgY29u c29sZT1jb20xLHZnYSAuLi4iCj4gCj4gYW5kIHVwZGF0ZWQgdGhlIGluaXRyZC4KPiAKPiB2ZXJp ZnlpbmcsCj4gCj4gCWdyZXAgc2VyaWFsIC9ib290L2dydWIyL2dydWIuY2ZnCj4gCQlzZXJpYWwg LS11bml0PTIgLS1zcGVlZD0xMTUyMDAKPiAJCXRlcm1pbmFsX2lucHV0IHNlcmlhbCBjb25zb2xl Cj4gCQl0ZXJtaW5hbF9vdXRwdXQgc2VyaWFsIGNvbnNvbGUKPiAKPiBhbmQKPiAKPiAJZ3JlcCBj b20gL2Jvb3QvZ3J1YjIveGVuLTQuMTMuMF8wNC1scDE1MS42ODguY2ZnCj4gCQkuLi4gY29tMT0x MTUyMDAsOG4xLDB4MDNlOCwzIGNvbnNvbGU9Y29tMSx2Z2EKPiAKPiBhZnRlciByZWJvb3QsIHRo ZXJlJ3MgdW5mb3J0dW5hdGVseSBOTyBhc3NpZ25lZCBVQVJUCj4gCj4gCXNldHNlcmlhbCAtZyAv ZGV2L3R0eVMqIHwgZ3JlcCAwM2U4Cj4gCQkvZGV2L3R0eVMyLCBVQVJUOiB1bmtub3duLCBQb3J0 OiAweDAzZTgsIElSUTogMwo+IAo+IGFuZCB0aGUgL2RldiBjYW4ndCBiZSB3cml0dGVuLAo+IAo+ IAkvYmluL3N0dHkgLUYgL2Rldi90dHlTMiAxMTUyMDAgcmF3IC1lY2hvCj4gCQkvYmluL3N0dHk6 IC9kZXYvdHR5UzI6IElucHV0L291dHB1dCBlcnJvcgo+IAo+IG9rLCBjb25mdXNlZC4KClRoYXQg c291bmRzIGxpa2UgWGVuIGNsYWltaW5nIHRoZSBzZXJpYWwgcG9ydC4KCkdpdmVuIHlvdSB3YW50 IFhlbiBhbmQgTGludXggdG8gc2hhcmUgYSBzZXJpYWwgcG9ydCwgc2hvdWxkbid0IHlvdSBiZSB1 c2luZyB0aGUgdmlydHVhbCBzZXJpYWwgcG9ydCBodmMwIHdpdGhpbiBMaW51eCB3aGVuIGJvb3Rl ZCB1bmRlciB4ZW4/CgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX18KWGVuLXVzZXJzIG1haWxpbmcgbGlzdApYZW4tdXNlcnNAbGlzdHMueGVucHJvamVjdC5v cmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi11c2Vy cw== From xen-users-bounces@lists.xenproject.org Sat Feb 01 01:54:38 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Sat, 01 Feb 2020 01:54:38 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1ixhzA-0004p9-FO; 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[99.7.172.215]) by smtp.gmail.com with ESMTPSA id z18sm12008540pfk.19.2020.01.31.17.54.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 31 Jan 2020 17:54:09 -0800 (PST) To: Sarah Newman , Xen-users@lists.xen.org References: <7b0d3565-7613-f4e4-8927-2b5eb48d0f9b@gmail.com> <62b2256b-500f-fd8c-eddd-c104442beb54@prgmr.com> <35b8335f-69c6-79f9-3aca-47f199fcff21@gmail.com> <9a715c04-5a32-8a65-9cf9-8ac2d7221dab@prgmr.com> From: PGNet Dev Message-ID: <405213df-3c24-0c77-807c-f5854004d811@gmail.com> Date: Fri, 31 Jan 2020 17:54:08 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.2 MIME-Version: 1.0 In-Reply-To: <9a715c04-5a32-8a65-9cf9-8ac2d7221dab@prgmr.com> Content-Language: en-US Subject: Re: [Xen-users] =?utf-8?q?serial_console_to_Dom0_--_connection=2C_bu?= =?utf-8?b?dCBvbmx5ICdnYXJiYWdlJyAo77+9ICwgJ3F1ZXN0aW9uIG1hcmsnKSBvdXRw?= =?utf-8?q?ut=2E_config_wrong=3F?= X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Reply-To: pgnet.dev@gmail.com Content-Type: text/plain; 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[99.7.172.215]) by smtp.gmail.com with ESMTPSA id d14sm12123067pfq.117.2020.01.31.18.24.53 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 31 Jan 2020 18:24:53 -0800 (PST) To: Sarah Newman , Xen-users@lists.xen.org References: <7b0d3565-7613-f4e4-8927-2b5eb48d0f9b@gmail.com> <62b2256b-500f-fd8c-eddd-c104442beb54@prgmr.com> <35b8335f-69c6-79f9-3aca-47f199fcff21@gmail.com> <9a715c04-5a32-8a65-9cf9-8ac2d7221dab@prgmr.com> <405213df-3c24-0c77-807c-f5854004d811@gmail.com> From: PGNet Dev Message-ID: Date: Fri, 31 Jan 2020 18:24:52 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.2 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Subject: Re: [Xen-users] =?utf-8?q?serial_console_to_Dom0_--_connection=2C_bu?= =?utf-8?b?dCBvbmx5ICdnYXJiYWdlJyAo77+9ICwgJ3F1ZXN0aW9uIG1hcmsnKSBvdXRw?= =?utf-8?q?ut=2E_config_wrong=3F?= X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Reply-To: pgnet.dev@gmail.com Content-Type: text/plain; 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[54.240.197.225]) by smtp.gmail.com with ESMTPSA id e6sm14567418wme.3.2020.02.01.03.29.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 01 Feb 2020 03:29:53 -0800 (PST) To: pierre-philipp braun , Camden Mannett References: <95171177-ffe3-bb59-f7b7-2c72bcb4be34@xen.org> <99478d30-f419-3cdb-e8c3-1d3d0e28ce92@nethence.com> From: Julien Grall Message-ID: <47549a7d-c097-edee-8bb5-817492833143@xen.org> Date: Sat, 1 Feb 2020 11:29:51 +0000 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.4.2 MIME-Version: 1.0 In-Reply-To: <99478d30-f419-3cdb-e8c3-1d3d0e28ce92@nethence.com> Content-Language: en-GB Subject: Re: [Xen-users] Load Xen domU (guest) kernel over TFTP X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: "xen-users@lists.xenproject.org" Content-Transfer-Encoding: base64 Content-Type: text/plain; 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[54.240.197.225]) by smtp.gmail.com with ESMTPSA id h10sm14423953wre.3.2020.02.01.04.18.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 01 Feb 2020 04:18:01 -0800 (PST) To: pierre-philipp braun , Camden Mannett References: <95171177-ffe3-bb59-f7b7-2c72bcb4be34@xen.org> <99478d30-f419-3cdb-e8c3-1d3d0e28ce92@nethence.com> <47549a7d-c097-edee-8bb5-817492833143@xen.org> <9b126f6a-4f9a-a26e-1dbd-cb968caf186d@nethence.com> From: Julien Grall Message-ID: <48dcdedf-c396-5f51-aef0-cea3ff860e1b@xen.org> Date: Sat, 1 Feb 2020 12:18:00 +0000 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.4.2 MIME-Version: 1.0 In-Reply-To: <9b126f6a-4f9a-a26e-1dbd-cb968caf186d@nethence.com> Content-Language: en-GB Subject: Re: [Xen-users] Load Xen domU (guest) kernel over TFTP X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: "xen-users@lists.xenproject.org" Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" CgpPbiAwMS8wMi8yMDIwIDEyOjA0LCBwaWVycmUtcGhpbGlwcCBicmF1biB3cm90ZToKPj4gSG93 ZXZlciwgSSBhbSBub3QgZW50aXJlbHkgc3VyZSBob3cgdGhpcyB3b3VsZCBzb2x2ZSB0aGUgcHJv YmxlbSBoZXJlLgo+PiBFdmVuIGlmIHlvdSBtYW5hZ2UgdG8gcGFjayB0aGUgdHdvIGtlcm5lbHMs IGhvdyBkbyB5b3UgcGFzcyBpdCB0byB0aGUKPj4gZ3Vlc3Q/Cj4gCj4gSSBhbSBzb3JyeSwgSSBt aXNyZWFkIHRoZSBvcmlnaW5hbCBwb3N0LiAgSSB0aG91Z2ggaXQgd2FzIGEgbWF0dGVyIG9mCj4g bG9hZGluZyB4ZW4gYW5kIGRvbTAgdGhyb3VnaCBURlRQLCAKCkVGSSwgR1JVQiwgVS1ib290LCBh cmUgYWJsZSB0byBkZWFsIHdpdGggWGVuIG9uIEFybSBvdXQtb2YtdGhlLWJveCB3aXRoIAptb3Jl IG9yIGxlc3MgcGFpbiA6KS4KCkZvciBFRkksIHRoaXMgaXMgdGhlIHNhbWUgYXMgZm9yIHg4Niwg aS5lIHlvdSB3cml0ZSBhIGNvbmZpZ3VyYXRpb24gZmlsZSAKc3BlY2lmeWluZyB3aGVyZSBhbGwg eW91ciBtb2R1bGVzIHJlc2lkZXMuCgpGb3IgR1JVQiwgcmVjZW50IHZlcnNpb25zIGFyZSBhYmxl IHRvIGRlYWwgd2l0aCB0aGUgWGVuIG9uIEFybSBtdWx0aWJvb3QgCnByb3RvY29sLiBUaGUgY29t bWFuZHMgdG8gbG9hZCBYZW4vTGludXguLi4gYXJlIHRoZSBzYW1lIGFzIGZvciB4ODYuIEZvciAK b2xkZXIgdmVyc2lvbiwgeW91IGNvdWxkIGNoYWlubG9hZCBYZW4gYW5kIHVzZSB0aGUgc2FtZSBj b25maWd1cmF0aW9uIApmaWxlIGFzIGZvciBFRkkuCgpGb3IgVS1ib290LCB0aGVyZSBpcyBubyBk aXJlY3Qgc3VwcG9ydCBmb3IgWGVuIG9uIEFybSBtdXRpYm9vdC4gQnV0IHlvdSAKY291bGQgd3Jp dGUgeW91IG93biBzY3JpcHQgdG8gbG9hZCBhbGwgdGhlIG1vZHVsZXMgYW5kIGdlbmVyYXRlIHRo ZSAKbXVsdGlib290IG5vZGVzLiBUaGlzIGlzIGEgYml0IG9mIGEgcGFpbiwgYWx0aG91Z2ggd2Ug cHJvdmlkZSBzb21lIApleGFtcGxlIG9uIHRoZSB3aWtpIGFuZCBTdGVmYW5vIFN0YWJlbGxpbmkg aGFzIGJlZW4gd29ya2luZyBvbiBhIHRvb2wgdG8gCmdlbmVyYXRlIGV2ZXJ5dGhpbmcgZm9yIHlv dS4gTW9yZSByZWNlbnQgdmVyc2lvbiBvZiBVLWJvb3QgYXJlIGFibGUgdG8gCmxvYWQgRUZJIGFw cGxpY2F0aW9uLiBTbyB5b3UgY291bGQgbG9hZCBHUlVCIGFzIGFuIEVGSSBhcHAgbWFraW5nIFUt Ym9vdCAKbmljZXIgdG8gdXNlLgoKQ2hlZXJzLAoKLS0gCkp1bGllbiBHcmFsbAoKX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLXVzZXJzIG1haWxpbmcg bGlzdApYZW4tdXNlcnNAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9q ZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi11c2Vycw== From xen-users-bounces@lists.xenproject.org Mon Feb 03 09:12:36 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 03 Feb 2020 09:12:36 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1iyXl8-00076F-JM; Mon, 03 Feb 2020 09:11:10 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1iyXl7-00076A-0X for xen-users@lists.xenproject.org; Mon, 03 Feb 2020 09:11:09 +0000 X-Inumbo-ID: 1cd9685a-4665-11ea-b211-bc764e2007e4 Received: from mail-vs1-f68.google.com (unknown [209.85.217.68]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 1cd9685a-4665-11ea-b211-bc764e2007e4; Mon, 03 Feb 2020 09:11:08 +0000 (UTC) Received: by mail-vs1-f68.google.com with SMTP id v141so8392665vsv.12 for ; Mon, 03 Feb 2020 01:11:07 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=rBQAheyl2DO8XzxAqyJL0BNlZgBdNNVKLoJ6WeGHgb0=; b=EmpQqemk4mxZP7tCLREJN6FQnIZ8paQAHkxT6BJAMRrtdd4Oz2OwrHFmJhkGypMMeQ Me0XRtwVzNhnkOnPIxte62hMyBrHm2GdSDiuafACmxuPDrDIwF4zw+eWvvK/hPBBi7Ff WXvOhjSUvS4/LnPwDn698Px/8s8KaP5OFA50nHHC/8iVD47GIPyat4huKcCPRWKKiIGf TKR6AT3pbbCMNNOz3aJBzEVoDUFCEzgmxq+S9HYPnCVjTyUQRB6dq/DFvF00L93pn+cS EAzUylx69mrnZVZawQdcxaqDrn8EHgxqYyd7S20LMHXHUZ7xWTn8U8DLBYmpNNwog+3H H03g== X-Gm-Message-State: APjAAAWGeZR//ry0KN1ORzyQzlZx4NMgR7ddvNpQAb74m+/qjbZS336U 8RQp+jfKWdifJeRMZN4Sqtu/b6MCiH8= X-Google-Smtp-Source: APXvYqx9QTDB8OxCpqnRwK4bXgPPOdpYsMxcqSiKbZ+blKfmh5KD5UA+tpMdMragT9QUaiz+JWtk0Q== X-Received: by 2002:a67:8ec9:: with SMTP id q192mr15114983vsd.190.1580721067384; Mon, 03 Feb 2020 01:11:07 -0800 (PST) Received: from mail-vk1-f182.google.com (mail-vk1-f182.google.com. [209.85.221.182]) by smtp.gmail.com with ESMTPSA id w28sm6031624vkm.36.2020.02.03.01.11.06 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 03 Feb 2020 01:11:07 -0800 (PST) Received: by mail-vk1-f182.google.com with SMTP id p191so3896313vkf.8 for ; Mon, 03 Feb 2020 01:11:06 -0800 (PST) X-Received: by 2002:a1f:3613:: with SMTP id d19mr13383527vka.71.1580721066811; Mon, 03 Feb 2020 01:11:06 -0800 (PST) MIME-Version: 1.0 From: Daniel Musketa Date: Mon, 3 Feb 2020 10:10:56 +0100 X-Gmail-Original-Message-ID: Message-ID: To: xen-users@lists.xenproject.org Subject: [Xen-users] Xen 4.11.2, Debian 10, HVM: "could not add USB device" X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" SGVsbG8gZXZlcnlvbmUhCgpPbiBjdXJyZW50IERlYmlhbiAxMCBJIHdhbnQgdG8gcGFzcyBhIFVT QgpkZXZpY2UgdG8gYW4gSFZNIGRvbVUuIEZvbGxvd2luZyB0aGUgd2lraQoKICBodHRwczovL3dp a2kueGVucHJvamVjdC5vcmcvd2lraS9YZW5fVVNCX1Bhc3N0aHJvdWdoCgpJIGFkZGVkCgogIHVz YmRldmljZXMgPSBbInRhYmxldCIsICJob3N0OjBkNDY6MzAxNCJdCgpidXQgSSBnZXQKCiAgcWVt dS1zeXN0ZW0taTM4NjogLXVzYmRldmljZSBob3N0OjBkNDY6MzAxNDogY291bGQgbm90IGFkZAog IFVTQiBkZXZpY2UgJ2hvc3Q6MGQ0NjozMDE0JwoKCkkgYWxzbyBjaGVja2VkIHdpdGggYSBtYXNz IHN0b3JhZ2UgZGV2aWNlIDA5NTE6MTY0MyAod2l0aAphbmQgd2l0aG91dCBgcm1tb2QgdXNiLXN0 b3JhZ2VgKSBhbmQgZ2V0IHRoZSBleGFjdCBzYW1lCmVycm9yIG1lc3NhZ2UuCgpXaGF0IGlzIHRo ZSB1c3VhbCBzdXNwZWN0IGhlcmU/IFdoYXQgdG8gY2hlY2sgbmV4dD8KCgpgeGwgaW5mb2A6IGh0 dHBzOi8vZHBhc3RlLm9yZy9TVVVUCmB4bCBkbWVzZ2A6IGh0dHBzOi8vZHBhc3RlLm9yZy9YcUZC Ci92YXIvbG9nL3hlbi9xZW11LWRtLWdybWwubG9nOiBodHRwczovL2RwYXN0ZS5vcmcvVmJHawov ZXRjL3hlbi9ncm1sLmNvbmY6IGh0dHBzOi8vZHBhc3RlLm9yZy9mYkFLCmBkcGtnIC1sICJxZW11 KiIgInhlbioiOiBodHRwczovL2RwYXN0ZS5vcmcvbmdEYQoKX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLXVzZXJzIG1haWxpbmcgbGlzdApYZW4tdXNl cnNAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWls bWFuL2xpc3RpbmZvL3hlbi11c2Vycw== From xen-users-bounces@lists.xenproject.org Thu Feb 06 07:07:55 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Thu, 06 Feb 2020 07:07:55 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1izbFA-000198-0d; 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boundary="===============7078862856757223400==" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" --===============7078862856757223400== Content-Type: multipart/alternative; boundary="000000000000682e7b059de2e969" --000000000000682e7b059de2e969 Content-Type: text/plain; charset="UTF-8" On Mon, Jan 27, 2020 at 2:42 PM Tomas Mozes wrote: > > > On Tue, Jan 7, 2020 at 8:29 AM Tomas Mozes wrote: > >> Hello, >> I've tried upgrading one of my long running Xen-dom0 machines from Xen >> 4.11.3 to 4.12.1. It's been working fine for several days, but after that >> one of the domUs failed the monitoring checks and it was impossible to >> access it via ssh. From the monitoring it's visible that the load just >> starts to grow linearly (the memory consumption grows too as new monitoring >> processes are spawned and don't finish) and the machine is simply stuck. It >> happened 3 times during the last 3 weeks. The Dom0 is working fine, just >> one of the domUs is stuck (always the same domU is stuck). >> >> Xen got upgraded 19.12.2019, the first lockup happened 26.12.2019, then >> 28.12.2019 and 5.1.2020. >> >> The domU kernel log is full of these messages: >> Jan 5 13:19:20 kernel: [680493.141103] INFO: rcu_sched detected stalls >> on CPUs/tasks: >> Jan 5 13:19:20 kernel: [680493.141107] (detected by 12, t=147012 >> jiffies, g=72555998, c=72555997, q=89937) >> Jan 5 13:19:20 kernel: [680493.141112] All QSes seen, last rcu_sched >> kthread activity 147012 (4975178416-4975031404), jiffies_till_next_fqs=3, >> root ->qsmask 0x0 >> Jan 5 13:19:20 kernel: [680493.141114] php-fpm R running task >> 14024 17581 2249 0x00000000 >> Jan 5 13:19:20 kernel: [680493.141120] Call Trace: >> Jan 5 13:19:20 kernel: [680493.141124] >> Jan 5 13:19:20 kernel: [680493.141131] sched_show_task.cold+0xb4/0xcb >> Jan 5 13:19:20 kernel: [680493.141135] >> rcu_check_callbacks.cold+0x36d/0x3ba >> Jan 5 13:19:20 kernel: [680493.141138] update_process_times+0x24/0x60 >> Jan 5 13:19:20 kernel: [680493.141143] tick_sched_handle+0x30/0x50 >> Jan 5 13:19:20 kernel: [680493.141145] tick_sched_timer+0x30/0x70 >> Jan 5 13:19:20 kernel: [680493.141147] ? tick_sched_do_timer+0x40/0x40 >> Jan 5 13:19:20 kernel: [680493.141149] __hrtimer_run_queues+0xbc/0x1f0 >> Jan 5 13:19:20 kernel: [680493.141153] hrtimer_interrupt+0xa0/0x1d0 >> Jan 5 13:19:20 kernel: [680493.141158] xen_timer_interrupt+0x1e/0x30 >> Jan 5 13:19:20 kernel: [680493.141162] >> __handle_irq_event_percpu+0x3d/0x160 >> Jan 5 13:19:20 kernel: [680493.141164] handle_irq_event_percpu+0x1c/0x60 >> Jan 5 13:19:20 kernel: [680493.141168] handle_percpu_irq+0x32/0x50 >> Jan 5 13:19:20 kernel: [680493.141171] generic_handle_irq+0x1f/0x30 >> Jan 5 13:19:20 kernel: [680493.141175] >> __evtchn_fifo_handle_events+0x13f/0x150 >> Jan 5 13:19:20 kernel: [680493.141181] __xen_evtchn_do_upcall+0x53/0x90 >> Jan 5 13:19:20 kernel: [680493.141186] xen_evtchn_do_upcall+0x22/0x40 >> Jan 5 13:19:20 kernel: [680493.141191] xen_hvm_callback_vector+0x85/0x90 >> Jan 5 13:19:20 kernel: [680493.141192] >> Jan 5 13:19:20 kernel: [680493.141194] RIP: 0033:0x56398dc8a959 >> Jan 5 13:19:20 kernel: [680493.141195] RSP: 002b:00007ffdd588d3d0 >> EFLAGS: 00000246 ORIG_RAX: ffffffffffffff0c >> Jan 5 13:19:20 kernel: [680493.141197] RAX: 0000000000000060 RBX: >> 00007f6ea3aa02e0 RCX: 0000000000000000 >> Jan 5 13:19:20 kernel: [680493.141198] RDX: 00007f6ea3aa02a0 RSI: >> 00007ffdd588d3d8 RDI: 00007ffdd588d3e0 >> Jan 5 13:19:20 kernel: [680493.141199] RBP: 00007f6ea3a9b5b0 R08: >> 00007f6ea49be770 R09: 00007f6ea483cdc0 >> Jan 5 13:19:20 kernel: [680493.141200] R10: 00007f6eae520a40 R11: >> 00007f6eae4933c0 R12: 00005639902892a0 >> Jan 5 13:19:20 kernel: [680493.141201] R13: 0000000000000000 R14: >> 00007f6eae41e930 R15: 00007f6ea7077138 >> Jan 5 13:19:20 kernel: [680493.141204] rcu_sched kthread starved for >> 147012 jiffies! g72555998 c72555997 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x200 >> ->cpu=3 >> Jan 5 13:19:20 kernel: [680493.141205] rcu_sched R15016 8 >> 2 0x80000000 >> Jan 5 13:19:20 kernel: [680493.141210] Call Trace: >> Jan 5 13:19:20 kernel: [680493.141215] ? __schedule+0x24e/0x710 >> Jan 5 13:19:20 kernel: [680493.141216] schedule+0x2d/0x80 >> Jan 5 13:19:20 kernel: [680493.141219] schedule_timeout+0x16c/0x340 >> Jan 5 13:19:20 kernel: [680493.141221] ? call_timer_fn+0x130/0x130 >> Jan 5 13:19:20 kernel: [680493.141222] rcu_gp_kthread+0x486/0xd60 >> Jan 5 13:19:20 kernel: [680493.141224] kthread+0xfd/0x130 >> Jan 5 13:19:20 kernel: [680493.141226] ? force_qs_rnp+0x170/0x170 >> Jan 5 13:19:20 kernel: [680493.141227] ? __kthread_parkme+0x90/0x90 >> Jan 5 13:19:20 kernel: [680493.141228] ret_from_fork+0x35/0x40 >> >> Xen-dom0 is running kernel 4.14.158 and these xen command line options: >> GRUB_CMDLINE_XEN="dom0_mem=4G gnttab_max_frames=256 ucode=scan loglvl=all >> guest_loglvl=all console_to_ring console_timestamps=date conring_size=1m >> smt=true iommu=no-intremap" >> >> Xen-domU config: >> name = "machine" >> kernel = "kernel-4.14.159-gentoo-xen" >> memory = 10000 >> vcpus = 16 >> vif = [ '' ] >> disk = [ >> '...root,raw,xvda,rw', >> '...opt,raw,xvdc,rw', >> '...home,raw,xvdb,rw', >> '...tmp,raw,xvdd,rw', >> '...var,raw,xvde,rw', >> ] >> extra = "root=/dev/xvda net.ifnames=0 console=ttyS0 console=ttyS0,38400n8" >> type = "hvm" >> sdl = 0 >> vnc = 0 >> serial='pty' >> xen_platform_pci=1 >> max_grant_frames = 256 >> >> I've had issues like this in the past with the grant frames (basically >> this issue https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=880554), >> maybe some other value needs to be raised too? >> >> Thanks, >> Tomas >> > > Reproduced on another HP machine. The previous one was HP ProLiant DL360 > G7 with 2x Intel Xeon E5620 @ 2.40GHz. The other is HP ProLiant DL360p Gen8 > with 2x Intel Xeon CPU E5-2630 @ 2.30GHz. > > The strange thing is this does not happen on our testing machine (but has > lower load of course) - that's a Supermicro X10DRW with 1x Intel Xeon CPU > E5-2620 v3 @ 2.40GHz. > Just an update, I've tried Xen 4.12 and the latest staging Xen 4.13, both behave the same. Doesn't matter if kernel 4.14 or 5.4 is used. Right after the Xen version is reverted back to 4.11, everything works just fine, nothing else needs to be changed. I've tried adding "mitigations=off" to kernel options and "spec-ctrl=false xpti=false pv-l1tf=false tsx=true" to Xen options, but it didn't help either. Thanks, Tomas --000000000000682e7b059de2e969 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable



=
On Mon, Ja= n 27, 2020 at 2:42 PM Tomas Mozes <hydrapolic@gmail.com> wrote:


On Tue, Jan 7,= 2020 at 8:29 AM Tomas Mozes <hydrapolic@gmail.com> wrote:
Hello,
I've tri= ed upgrading one of my long running Xen-dom0 machines from Xen 4.11.3 to 4.= 12.1. It's been working fine for several days, but after that one of th= e domUs failed the monitoring checks and it was impossible to access it via= ssh. From the monitoring it's visible that the load just starts to gro= w linearly (the memory consumption grows too as new monitoring processes ar= e spawned and don't finish) and the machine is simply stuck. It happene= d 3 times during the last 3 weeks. The Dom0 is working fine, just one of th= e domUs is stuck (always the same domU is stuck).

Xen got upgraded 1= 9.12.2019, the first lockup happened 26.12.2019, then 28.12.2019 and 5.1.20= 20.

The domU kernel log is full of these messages:
Jan =C2=A05 13= :19:20 kernel: [680493.141103] INFO: rcu_sched detected stalls on CPUs/task= s:
Jan =C2=A05 13:19:20 kernel: [680493.141107] =C2=A0 =C2=A0 =C2=A0 =C2= =A0 (detected by 12, t=3D147012 jiffies, g=3D72555998, c=3D72555997, q=3D89= 937)
Jan =C2=A05 13:19:20 kernel: [680493.141112] All QSes seen, last rc= u_sched kthread activity 147012 (4975178416-4975031404), jiffies_till_next_= fqs=3D3, root ->qsmask 0x0
Jan =C2=A05 13:19:20 kernel: [680493.14111= 4] php-fpm =C2=A0 =C2=A0 =C2=A0 =C2=A0 R =C2=A0running task =C2=A0 =C2=A014= 024 17581 =C2=A0 2249 0x00000000
Jan =C2=A05 13:19:20 kernel: [680493.14= 1120] Call Trace:
Jan =C2=A05 13:19:20 kernel: [680493.141124] =C2=A0<= ;IRQ>
Jan =C2=A05 13:19:20 kernel: [680493.141131] =C2=A0sched_show_t= ask.cold+0xb4/0xcb
Jan =C2=A05 13:19:20 kernel: [680493.141135] =C2=A0rc= u_check_callbacks.cold+0x36d/0x3ba
Jan =C2=A05 13:19:20 kernel: [680493.= 141138] =C2=A0update_process_times+0x24/0x60
Jan =C2=A05 13:19:20 kernel= : [680493.141143] =C2=A0tick_sched_handle+0x30/0x50
Jan =C2=A05 13:19:20= kernel: [680493.141145] =C2=A0tick_sched_timer+0x30/0x70
Jan =C2=A05 13= :19:20 kernel: [680493.141147] =C2=A0? tick_sched_do_timer+0x40/0x40
Jan= =C2=A05 13:19:20 kernel: [680493.141149] =C2=A0__hrtimer_run_queues+0xbc/0= x1f0
Jan =C2=A05 13:19:20 kernel: [680493.141153] =C2=A0hrtimer_interrup= t+0xa0/0x1d0
Jan =C2=A05 13:19:20 kernel: [680493.141158] =C2=A0xen_time= r_interrupt+0x1e/0x30
Jan =C2=A05 13:19:20 kernel: [680493.141162] =C2= =A0__handle_irq_event_percpu+0x3d/0x160
Jan =C2=A05 13:19:20 kernel: [68= 0493.141164] =C2=A0handle_irq_event_percpu+0x1c/0x60
Jan =C2=A05 13:19:2= 0 kernel: [680493.141168] =C2=A0handle_percpu_irq+0x32/0x50
Jan =C2=A05 = 13:19:20 kernel: [680493.141171] =C2=A0generic_handle_irq+0x1f/0x30
Jan = =C2=A05 13:19:20 kernel: [680493.141175] =C2=A0__evtchn_fifo_handle_events+= 0x13f/0x150
Jan =C2=A05 13:19:20 kernel: [680493.141181] =C2=A0__xen_evt= chn_do_upcall+0x53/0x90
Jan =C2=A05 13:19:20 kernel: [680493.141186] =C2= =A0xen_evtchn_do_upcall+0x22/0x40
Jan =C2=A05 13:19:20 kernel: [680493.1= 41191] =C2=A0xen_hvm_callback_vector+0x85/0x90
Jan =C2=A05 13:19:20 kern= el: [680493.141192] =C2=A0</IRQ>
Jan =C2=A05 13:19:20 kernel: [680= 493.141194] RIP: 0033:0x56398dc8a959
Jan =C2=A05 13:19:20 kernel: [68049= 3.141195] RSP: 002b:00007ffdd588d3d0 EFLAGS: 00000246 ORIG_RAX: fffffffffff= fff0c
Jan =C2=A05 13:19:20 kernel: [680493.141197] RAX: 0000000000000060= RBX: 00007f6ea3aa02e0 RCX: 0000000000000000
Jan =C2=A05 13:19:20 kernel= : [680493.141198] RDX: 00007f6ea3aa02a0 RSI: 00007ffdd588d3d8 RDI: 00007ffd= d588d3e0
Jan =C2=A05 13:19:20 kernel: [680493.141199] RBP: 00007f6ea3a9b= 5b0 R08: 00007f6ea49be770 R09: 00007f6ea483cdc0
Jan =C2=A05 13:19:20 ker= nel: [680493.141200] R10: 00007f6eae520a40 R11: 00007f6eae4933c0 R12: 00005= 639902892a0
Jan =C2=A05 13:19:20 kernel: [680493.141201] R13: 0000000000= 000000 R14: 00007f6eae41e930 R15: 00007f6ea7077138
Jan =C2=A05 13:19:20 = kernel: [680493.141204] rcu_sched kthread starved for 147012 jiffies! g7255= 5998 c72555997 f0x2 RCU_GP_WAIT_FQS(3) ->state=3D0x200 ->cpu=3D3
J= an =C2=A05 13:19:20 kernel: [680493.141205] rcu_sched =C2=A0 =C2=A0 =C2=A0 = R15016 =C2=A0 =C2=A0 8 =C2=A0 =C2=A0 =C2=A02 0x80000000
Jan =C2=A05 13:1= 9:20 kernel: [680493.141210] Call Trace:
Jan =C2=A05 13:19:20 kernel: [6= 80493.141215] =C2=A0? __schedule+0x24e/0x710
Jan =C2=A05 13:19:20 kernel= : [680493.141216] =C2=A0schedule+0x2d/0x80
Jan =C2=A05 13:19:20 kernel: = [680493.141219] =C2=A0schedule_timeout+0x16c/0x340
Jan =C2=A05 13:19:20 = kernel: [680493.141221] =C2=A0? call_timer_fn+0x130/0x130
Jan =C2=A05 13= :19:20 kernel: [680493.141222] =C2=A0rcu_gp_kthread+0x486/0xd60
Jan =C2= =A05 13:19:20 kernel: [680493.141224] =C2=A0kthread+0xfd/0x130
Jan =C2= =A05 13:19:20 kernel: [680493.141226] =C2=A0? force_qs_rnp+0x170/0x170
J= an =C2=A05 13:19:20 kernel: [680493.141227] =C2=A0? __kthread_parkme+0x90/0= x90
Jan =C2=A05 13:19:20 kernel: [680493.141228] =C2=A0ret_from_fork+0x3= 5/0x40

Xen-dom0 is running kernel 4.14.158 and these xen command lin= e options: GRUB_CMDLINE_XEN=3D"dom0_mem=3D4G gnttab_max_frames=3D256 u= code=3Dscan loglvl=3Dall guest_loglvl=3Dall console_to_ring console_timesta= mps=3Ddate conring_size=3D1m smt=3Dtrue iommu=3Dno-intremap"

Xe= n-domU config:
name =3D "machine"
kernel =3D "kernel-4= .14.159-gentoo-xen"
memory =3D 10000
vcpus =3D 16
vif =3D [ &= #39;' ]
disk =3D [
'...root,raw,xvda,rw',
'...opt,= raw,xvdc,rw',
'...home,raw,xvdb,rw',
'...tmp,raw,xvdd= ,rw',
'...var,raw,xvde,rw',
]
extra =3D "root=3D/= dev/xvda net.ifnames=3D0 console=3DttyS0 console=3DttyS0,38400n8"
t= ype =3D "hvm"
sdl =3D 0
vnc =3D 0
serial=3D'pty'=
xen_platform_pci=3D1
max_grant_frames =3D 256

I've had is= sues like this in the past with the grant frames (basically this issue https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=3D880554)= , maybe some other value needs to be raised too?

Thanks,
Tomas

Reproduced on another HP machine. T= he previous one was HP ProLiant DL360 G7 with 2x Intel Xeon E5620 @ 2.40GHz= . The other is HP ProLiant DL360p Gen8 with 2x Intel Xeon CPU E5-2630 @ 2.3= 0GHz.

The strange thing is this does not happ= en on our testing machine (but has lower load of course) - that's a Sup= ermicro X10DRW with 1x Intel Xeon CPU E5-2620 v3 @ 2.40GHz.


Just an update, I've = tried Xen 4.12 and the latest staging Xen 4.13, both behave the same. Doesn= 't matter if kernel 4.14 or 5.4 is used. Right after the Xen version is= reverted back to 4.11, everything works just fine, nothing else needs to b= e changed.

I've tried adding "mitigations=3Doff" to ke= rnel options and "spec-ctrl=3Dfalse xpti=3Dfalse pv-l1tf=3Dfalse tsx= =3Dtrue" to Xen options, but it didn't help either.

=
Thanks,
Tomas

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=C2=A0 Hi All,
=C2=A0
=C2=A0 I updated my Xe= n host to Debian buster, and my guests refuse to boot.

=
=C2=A0 OS and Xen versions are:
# lsb_release -a
No LSB m= odules are available.
Distributor ID: Debian
Description: Debian GNU/= Linux 10 (buster)
Release: 10
Codename: buster

=C2=A0 Xen 4.11.4-pre

=C2=A0 The error report= ed at guest VM creation is as follows:=C2=A0

xc: error: panic: xc_do= m_boot.c:122: xc_dom_boot_mem_init: can't allocate low memory for domai= n: Out of memory

libxl: error: libxl_dom.c:737:lib= xl__build_dom: xc_dom_boot_mem_init failed: Cannot allocate memory
=C2= =A0libxl: error: libxl_create.c:1267:domcreate_rebuild_done: Domain 2:canno= t (re-)build domain: -3


=C2=A0 =C2=A0I did= my share of googling and found nothing significant, at least not besides t= he following configurations I did for earlier Xen versions:
=C2= =A0 1) This entry in grub.cfg:
multiboot /boot/xen-4.11-amd64.gz = placeholder =C2=A0dom0_mem=3D1024M,max:1024M ${xen_rm_opts}
<= br>
=C2=A0 2) This entry in /etc/default/grub.d/xen.cfg
GRUB_C= MDLINE_XEN_DEFAULT=3D"dom0_mem=3D1024M,max:1024M"
<= br>
=C2=A0 Any suggestions? Checks? I'm out of ideas.
=C2=A0 Thank you for your attention,

=C2=A0 =C2= =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Ezio


-- =
Ezio Ostorero, Catania
Seltz e limone col sale. Arriminatu, non a= nnacatu
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[Xen-users] Xen 4.12 DomU hang / freeze / stall under high network/disk load X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" RGVhciBYZW4gVGVhbToKClNpbmNlIHVwZ3JhZGluZyB0byBYZW4gNC4xMiwgSSdtIGV4cGVyaWVu Y2luZyBhbiBvbmdvaW5nIHByb2JsZW0gd2l0aApzdGFsbGVkIGd1ZXN0cy4gIEkgaGFkIHByZXZp b3VzbHkgdGhvdWdodCBJIHdhcyB0aGUgb25seSBvbmUgd2l0aCB0aGlzCnByb2JsZW0sIGFuZCBo YWQgcmVwb3J0ZWQgdGhpcyB0byBteSBkaXN0cm8ncyB2aXJ0dWFsaXphdGlvbiB0ZWFtICgKc2Vl OiAgaHR0cHM6Ly9saXN0cy5vcGVuc3VzZS5vcmcvb3BlbnN1c2UtdmlydHVhbC8yMDE5LTEyL21z ZzAwMDAwLmh0bWwKIGFuZCAgaHR0cHM6Ly9saXN0cy5vcGVuc3VzZS5vcmcvb3BlbnN1c2Utdmly dHVhbC8yMDE5LTEyL21zZzAwMDAzLmh0bWwKZm9yIHRocmVhZCBoZWFkcyApLCBidXQgYWx0aG91 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amVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hl bi11c2Vycw== From xen-users-bounces@lists.xenproject.org Fri Feb 14 00:30:16 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Fri, 14 Feb 2020 00:30:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j2Oqi-0007Fi-9h; Fri, 14 Feb 2020 00:28:52 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j2Oqg-0007Fd-RI for xen-users@lists.xenproject.org; Fri, 14 Feb 2020 00:28:50 +0000 X-Inumbo-ID: f7fa0fc6-4ec0-11ea-b0fd-bc764e2007e4 Received: from mail.prgmr.com (unknown [2605:2700:0:5::4713:9506]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id f7fa0fc6-4ec0-11ea-b0fd-bc764e2007e4; Fri, 14 Feb 2020 00:28:49 +0000 (UTC) Received: from [192.168.2.33] (c-174-62-72-237.hsd1.ca.comcast.net [174.62.72.237]) (Authenticated sender: srn) by mail.prgmr.com (Postfix) with ESMTPSA id 0770772012A; Fri, 14 Feb 2020 00:31:00 -0500 (EST) DKIM-Filter: OpenDKIM Filter v2.11.0 mail.prgmr.com 0770772012A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=prgmr.com; s=default; t=1581658261; bh=VCiKejJ08z03IIMCe0wqEsVzXsJCXO/JnpI1Tj/OEMc=; h=Subject:To:References:From:Date:In-Reply-To:From; b=ZI5TRWqJowqV6osWXhKxYw9XQeiEEfv4OMnBZfisdASVjh7JXsprr5JERHUpAsvh1 5CYAs7jVYBNtYfkN1xZkPO6n+VP0gfNZp03QNEkkikg0uGxWykP0bZVqrZnJJ6MNck gCG6yAjK16ik2MT1bxytJvRclYqIWPCY2JzQspJ8= To: Glen , Xen-users References: From: Sarah Newman Message-ID: <85c45d9c-e4d0-51fc-db64-8bf9df1af3a6@prgmr.com> Date: Thu, 13 Feb 2020 16:28:47 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Subject: Re: [Xen-users] Xen 4.12 DomU hang / freeze / stall under high network/disk load X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" T24gMi8xMy8yMCAxOjA3IFBNLCBHbGVuIHdyb3RlOgo+IERlYXIgWGVuIFRlYW06Cj4gCj4gU2lu Y2UgdXBncmFkaW5nIHRvIFhlbiA0LjEyLCBJJ20gZXhwZXJpZW5jaW5nIGFuIG9uZ29pbmcgcHJv YmxlbSB3aXRoCj4gc3RhbGxlZCBndWVzdHMuICBJIGhhZCBwcmV2aW91c2x5IHRob3VnaHQgSSB3 YXMgdGhlIG9ubHkgb25lIHdpdGggdGhpcwo+IHByb2JsZW0sIGFuZCBoYWQgcmVwb3J0ZWQgdGhp cyB0byBteSBkaXN0cm8ncyB2aXJ0dWFsaXphdGlvbiB0ZWFtICgKPiBzZWU6ICBodHRwczovL2xp c3RzLm9wZW5zdXNlLm9yZy9vcGVuc3VzZS12aXJ0dWFsLzIwMTktMTIvbXNnMDAwMDAuaHRtbAo+ ICAgYW5kICBodHRwczovL2xpc3RzLm9wZW5zdXNlLm9yZy9vcGVuc3VzZS12aXJ0dWFsLzIwMTkt MTIvbXNnMDAwMDMuaHRtbAo+IGZvciB0aHJlYWQgaGVhZHMgKSwgYnV0IGFsdGhvdWdoIHRoZXkg dHJpZWQgdG8gaGVscCwgd2UgYWxsIGtpbmQgb2YKPiBjb25jbHVkZWQgKHdyb25nbHkpIHRoYXQg 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YW4vbGlzdGluZm8veGVuLXVzZXJz From xen-users-bounces@lists.xenproject.org Fri Feb 14 02:28:36 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Fri, 14 Feb 2020 02:28:36 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j2QhF-0003Za-Ap; Fri, 14 Feb 2020 02:27:13 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j2QhD-0003ZV-U8 for xen-users@lists.xenproject.org; Fri, 14 Feb 2020 02:27:12 +0000 X-Inumbo-ID: 806a5df6-4ed1-11ea-ade5-bc764e2007e4 Received: from mail-qv1-xf29.google.com (unknown [2607:f8b0:4864:20::f29]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 806a5df6-4ed1-11ea-ade5-bc764e2007e4; Fri, 14 Feb 2020 02:27:09 +0000 (UTC) Received: by mail-qv1-xf29.google.com with SMTP id l14so3617228qvu.12 for ; Thu, 13 Feb 2020 18:27:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; 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bWUsIFRIQU5LIFlPVSBmb3IgeW91ciByZXNwb25zZSwgYW5kIGlmIHlvdSBvciBhbnlvbmUKZWxz ZSBoYXMgYW55IG90aGVyIHRob3VnaHRzLCBwbGVhc2UgZG8gc2VuZCB0aGVtIHRvIG1lIQoKR2xl bgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLXVz ZXJzIG1haWxpbmcgbGlzdApYZW4tdXNlcnNAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9s aXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi11c2Vycw== From xen-users-bounces@lists.xenproject.org Fri Feb 14 03:06:58 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Fri, 14 Feb 2020 03:06:58 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j2RIw-0006w8-DL; Fri, 14 Feb 2020 03:06:10 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j2RIv-0006w3-KI for xen-users@lists.xenproject.org; Fri, 14 Feb 2020 03:06:09 +0000 X-Inumbo-ID: f11467f4-4ed6-11ea-ade5-bc764e2007e4 Received: from 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19:06:05 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Subject: Re: [Xen-users] Xen 4.12 DomU hang / freeze / stall under high network/disk load X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Xen-users Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" T24gMi8xMy8yMCA2OjI2IFBNLCBHbGVuIHdyb3RlOgoKPiBJIHRyaWVkIGJvdGggeGwgbmV0d29y ay1kZXRhY2ggZm9sbG93ZWQgYnkgYSBuZXR3b3JrLWF0dGFjaCAoZmVlZGluZwo+IGJhY2sgaW4g dGhlIHBhcmFtZXRlcnMgZnJvbSBteSBndWVzdCBtYWNoaW5lLikKCk9LLiBXZXJlIHlvdSBhYmxl IHRvIGNoZWNrIGlmIHRoZSBuZXR3b3JrIGRldmljZSB3ZW50IGF3YXkgaW4gdGhlIGRvbVU/IEl0 IHNob3VsZCBoYXZlLCBidXQgeW91IHdvbid0IHNlZSBhbnl0aGluZyBpbiBkbWVzZyBuZWNlc3Nh 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<85c45d9c-e4d0-51fc-db64-8bf9df1af3a6@prgmr.com> <685c6bdf-9b0f-d185-bc11-d74fb956eaeb@prgmr.com> In-Reply-To: <685c6bdf-9b0f-d185-bc11-d74fb956eaeb@prgmr.com> From: Glen Date: Thu, 13 Feb 2020 19:27:45 -0800 Message-ID: To: Sarah Newman Subject: Re: [Xen-users] Xen 4.12 DomU hang / freeze / stall under high network/disk load X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Xen-users Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" T24gVGh1LCBGZWIgMTMsIDIwMjAgYXQgNzowNiBQTSBTYXJhaCBOZXdtYW4gPHNybkBwcmdtci5j b20+IHdyb3RlOgo+ID4gSSB0cmllZCBib3RoIHhsIG5ldHdvcmstZGV0YWNoIGZvbGxvd2VkIGJ5 IGEgbmV0d29yay1hdHRhY2ggKGZlZWRpbmcKPiA+IGJhY2sgaW4gdGhlIHBhcmFtZXRlcnMgZnJv bSBteSBndWVzdCBtYWNoaW5lLikKPiBPSy4gV2VyZSB5b3UgYWJsZSB0byBjaGVjayBpZiB0aGUg 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multipart/alternative; boundary="0000000000002af71a059e84b269" --0000000000002af71a059e84b269 Content-Type: text/plain; charset="UTF-8" On Thu, Feb 13, 2020 at 10:11 PM Glen wrote: > Dear Xen Team: > > Since upgrading to Xen 4.12, I'm experiencing an ongoing problem with > stalled guests. I had previously thought I was the only one with this > problem, and had reported this to my distro's virtualization team ( > see: https://lists.opensuse.org/opensuse-virtual/2019-12/msg00000.html > and https://lists.opensuse.org/opensuse-virtual/2019-12/msg00003.html > for thread heads ), but although they tried to help, we all kind of > concluded (wrongly) that I must just have had a bad guest. > > I finally recreated a new host and a new guest, clean, from scratch, > thinking that would solve the problem, and it didn't. That led me to > search again, and I now see that another individual (who doubtless > thought HE was the only one) has reported this issue to your list ( > https://lists.xenproject.org/archives/html/xen-users/2020-02/msg00015.html > et al). > > So I'm sending this report here to let you all know that this problem > is now no longer limited to one person, and it is reproducible, and > is, in my opinion, severe. I hope that someone here can help, or > point us in the right direction. Here we go: > > Problem: Xen DomU guests randomly stall under high network/disk > loads. Dom0 is not affected. Randomly means anywhere between 1 hour > and 14 days after guest boot - the time seems to shorten with (or > perhaps the problem is triggered by) increased network (and possibly > disk) activity. > > Symptoms on the DomU Guest: > 1. Guest machine performs normally until the moment of failure. No > abnormal log/console entries exist. > 2. At the moment of failure, the guest's network goes offline. No > abnormal log/console entries are written at that moment. > 3. Processes which were trying to connect to the network start to > consume increasing amounts of CPU. > 4. Load average of the guest starts to increase, continuing upward > without apparent bound. > 5. If a high-priority bash shell is left logged in on the guest hvc0 > console, some commands might still be runnable; most are not. > 6. If the guest console is not logged in, the console is frozen and > doesn't even echo characters. > 7. Some guests will output messages on the console like this: > kernel: [164084.912966] NMI watchdog: BUG: soft lockup - CPU#16 stuck for > 67s! > 8. On some others, I will also see output like: > BUG: workqueue lockup - pool cpus=20 node=0 flags=0x0 nice=-20 stuck for > 70s! > 9. Sometimes there is no output at all on the console. > > Symptoms on the Dom0 Host: > 1. The Dom0 Host is unaffected. The only indication anything is > happening on the host are two log entries in /var/log/messages: > vif vif-6-0 vif6.0: Guest Rx stalled > br0: port 2(vif6.0) entered disabled state > 2. Other guests are not affected (Although other guests too may stall > at other random times, stalls on one guest do not seem to affect other > guests directly.) > > Circumstances when the problem first occurred: > 1. All hosts and guests were previously on Xen 4.9.4 (OpenSuse 42.3, > Linux 4.4.180, Xen 4.9.4) > 2. I upgraded one physical host to Xen 4.12.1 (OpenSuse 15.1, Linux > 4.12.14, Xen 4.12.1). > 3. The guest(s) on that host started malfunctioning at that point. > > Immediate steps taken while the guest was stalled, which did not help: > 1. Tried to use high-priority shell on guest console to kill high-CPU > processes; they were unkillable. > 2. Tried to use guest console to stop and restart network; commands > were unresponsive. > 3. Tried to use guest console to shutdown/init 0. This caused console > to be terminated, but guest would not otherwise shutdown. > 4. Tried to use host xl interface to unplug/replug network bridges. > This appeared to work from host side, but guest was unaffected. > > One thing which I accidentally discovered that *did* help: > 1. Tried sending xl trigger nmi from the host to the guest. > > When I trigger the stalled guest with an NMI, I get its attention. > The guest will print the following on the console: > > Uhhuh. NMI received for unknown reason 00 on CPU 0. > Do you have a strange power saving mode enabled? > Dazed and confused, but trying to continue > > In some cases (pattern not yet known), the guest will then immediately > come back online: The network will come back online, and all > processes will slowly stop consuming CPU, and things will return to > normal. Existing network connections were obviously terminated, but > new connections are accepted. In that case, it's like the guest just > magically comes back to life. > > When this works, the host log shows: > vif vif-6-0 vif6.0: Guest Rx ready > br0: port 2(vif6.0) entered blocking state > br0: port 2(vif6.0) entered forwarding state > > And all seems well... as if the guest had never stalled. > > However, this is not reliable. In most cases, the guest will print > those messages, but the processes will NOT recover, and the network > will come back impaired, or not at all. When that happens, repeated > NMIs do not help: If the guest doesn't recover the first time, it > doesn't recover at all. > > The *only* reliable way to recover is to destroy the guest completely, > and recreate it. This is a hard destroy: the guest cannot shut > itself down. The guest will then run fine... until the next stall. > But of course a hard-destroy can't be a healthy thing for a guest > machine, and that's really not a solution. > > Long-term mitigation steps which were tried which did not help. > 1. Thought this was an SSH bug (since sshd processes were consuming > high CPU), installed latest OpenSSH. > 2. Though maybe a PV problem, tried under HVM instead of PV. > 3. Noted a problem with grant frames, applied the recommended fix for > that, my config now looks like: > # xen-diag gnttab_query_size 0 # Domain-0 > domid=0: nr_frames=1, max_nr_frames=64 > # xen-diag gnttab_query_size 1 # Xenstore > domid=1: nr_frames=4, max_nr_frames=4 > # xen-diag gnttab_query_size 6 # My guest > domid=6: nr_frames=17, max_nr_frames=256 > 4. Thought maybe a kernel module might be at issue, reviewed list with > OpenSuse team, pruned modules. > 5. Thought this might be a kernel mismatch, was referred to a new > kernel by OpenSuse team (Linux 4.12.13 for OpenSuse 42.3). That > changed some of the console output behavior and logging, but did not > solve the problem. > 6. Thought this might be a general OS mismatch, tried upgrading the > guest to the same OS/Xen versions as the host (OpenSuse 15.1/Linux > 4.12.14/Xen 4.12.1). In this configuration, no console or log output > is generated on the guest at all, it just stalls. > 7. Assumed (incorrectly, it now turns out) that something was just > "wrong" with my guest, tried a fresh load of host, and a fresh guest. > I thought that would solve it, but to my sadness, it did not. > > Which means that this is now a reproducible bug. > > Steps to reproduce: > 1. Get a server. I'm using a Dell PowerEdge R720, but this has > happened on several different Dell models. My current server has two > 16-core CPUs, and 128GB of RAM. > 2. Load Xen 4.12.1 (OpenSuse 15.1/Xen 4.12.1) on the server. Boot it > up in Xen Dom0/host mode. > 3. Create a new guest machine, also with 4.12.1. > 4. Fire up the guest. > 5. Put a lot of data on the guest (my guest has 3 TB of files and data). > 6. Plug a crossover cable into your server, and plug the other end > into some other Linux machine. > 7. From that other machine, start pounding the guest. An rsync of the > entire data partition is a great way to trigger this. If I run > several outbound rsyncs together, I can crash my guest in under 48 > hours. If I run 4 or 5, I can often crash the guest in just 2 hours. > If you don't want to damage your SSDs on your other machine, here's my > current command (my host is 192.168.1.10, and my guest is > 192.168.1.11, so I plug in some other machine and make it, say, > 192.168.1.12, and then run: > > nohup ssh 192.168.1.11 tar cf - --one-file-system /a | cat > /dev/null & > > Where /a is my directory full of user data. 4-6 of these running > simultaneously will bring the guest to its knees in short order. > > On my most recent test, I did the NMI trigger thing, and found this in > the guest's /var/log/messages after sending the trigger (I've removed > tagging and timestamping for clarity:) > > Uhhuh. NMI received for unknown reason 00 on CPU 0. > Do you have a strange powersaving mode enabled? > Dazed and confused, but trying to continue > clocksource: timekeeping watchdog on CPU0: Marking clocksource 'tsc' > as unstable because the skew is too large: > clocksource: 'xen' wd_now: 58842b687eb3c wd_last: 55aa97ff29565 mask: > ffffffffffffffff > clocksource: 'tsc' cs_now: 58d3355ea9a87e cs_last: 585cca21d4f074 > mask: ffffffffffffffff > tsc: Marking TSC unstable due to clocksource watchdog > BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=-20 stuck for > 50117s! > Showing busy workqueues and worker pools: > workqueue events: flags=0x0 > pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256 > pending: clocksource_watchdog_work, vmstat_shepherd, cache_reap > workqueue mm_percpu_wq: flags=0x8 > pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 > pending: vmstat_update > workqueue writeback: flags=0x4e > pwq 52: cpus=0-25 flags=0x4 nice=0 active=1/256 > in-flight: 28593:wb_workfn > workqueue kblockd: flags=0x18 > pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=2/256 > pending: blk_mq_run_work_fn, blk_mq_timeout_work > pool 52: cpus=0-25 flags=0x4 nice=0 hung=0s workers=3 idle: 32044 18125 > > That led me to search around, and I tripped over this: > https://wiki.debian.org/Xen/Clocksource , which describes a guest > hanging with the message "clocksource/0: Time went backwards/" > Although I did not see this message, and this is not directly on point > with OpenSuse (since our /proc structure doesn't include some of the > switches mentioned), I did notice clocksource references in the logs > (see above), and that led me back to: > > https://doc.opensuse.org/documentation/leap/virtualization/html/book.virt/cha-xen-manage.html > , > and specifically the tsc_mode setting. I have no idea if it's > relevant, but I since I'm out of ideas and have nothing better to try, > I have now booted my guest into tsc_mode=1 and am stress testing it to > see if it fares any better this way. > > Administrivia: > OS: OpenSuse 15.1 > Linux: 4.12.14-lp151.28.36 > Xen: 4.12.1 > Dom0 boot parameters: dom0_mem=4G dom0_max_vcpus=4 dom0_vcpus_pin > gnttab_max_frames=256 > Xen guest config: > > name="guest1" > description="guest1" > memory=90112 > maxmem=90112 > vcpus=26 > cpus="4-31" > on_poweroff="destroy" > on_reboot="restart" > on_crash="restart" > on_watchdog="restart" > localtime=0 > keymap="en-us" > type="pv" > kernel="/usr/lib/grub2/x86_64-xen/grub.xen" > extra="elevator=noop" > disk=[ > '/xen/guest1/guest1.root,raw,xvda1,w', > '/xen/guest1/guest1.swap,raw,xvda2,w', > '/xen/guest1/guest1.xa,raw,xvda3,w', > ] > vif=[ > 'rate=100Mb/s,mac=00:16:3f:49:4a:41,bridge=br0', > ] > vfb=['type=vnc,vncunused=1'] > > I had originally thought that I was the only person with this problem, > and that's why I thought a fresh guest would fix it - the problem > followed me around different servers, so that made sense. Over the > past weeks I've set up a fresh guest on my fresh host, and, just on a > whim, did the above stress testing on it... sadly, it only lasted for > 36 hours. On the older Xen 4.9, I *never* encountered problems, and > nothing changed other than OS/Xen versions when I did the upgrades to > the new versions. > > Since I can now reproduce the problem on different hardware and > setups, I thought I'd start my searches over again. To my relief, I > found that, just in the past few weeks, another person has now > reported what seems to be the same problem, only he reported it to > this list (whereas I had sent my report to OpenSuse.) In his message, > referenced above, he states that the problem is limited to Xen 4.12 > and 4.13, and that rolling back to Xen 4.11 solves the problem. > > If that's right, there seems to be a *significant* problem somewhere, > and it's clearly no longer just one instance. > > I am looking for a means on Xen to bug report this; so far, I haven't > found it, but I will keep looking. > > Meanwhile, I'm hoping that these details and history spark something > for some of you here. Do any of you have any ideas on this? Any > thoughts, guidance, musings, etc., anything at all would be > appreciated. > > Again, thank you all for your patience and help, I am very grateful! > > Glen > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xenproject.org > https://lists.xenproject.org/mailman/listinfo/xen-users Hello Glen, thanks for your report. The symptoms seem similar: - xen 4.12 - 2 cpu - high load - dom0 is ok, domU stalls I've just upgraded one of my machines to xen 4.12 (again) with sched=credit, I'll report back if it helps. Thanks, Tomas --0000000000002af71a059e84b269 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Thu, Feb 13, 2020 at 10:11 PM Glen= <glenbarney@gmail.com> w= rote:
Dear Xen T= eam:

Since upgrading to Xen 4.12, I'm experiencing an ongoing problem with stalled guests.=C2=A0 I had previously thought I was the only one with this=
problem, and had reported this to my distro's virtualization team (
see:=C2=A0 https://lists.opensuse.o= rg/opensuse-virtual/2019-12/msg00000.html
=C2=A0and=C2=A0 https://lists.opens= use.org/opensuse-virtual/2019-12/msg00003.html
for thread heads ), but although they tried to help, we all kind of
concluded (wrongly) that I must just have had a bad guest.

I finally recreated a new host and a new guest, clean, from scratch,
thinking that would solve the problem, and it didn't.=C2=A0 That led me= to
search again, and I now see that another individual (who doubtless
thought HE was the only one) has reported this issue to your list=C2=A0 ( https://lists.xenproject.o= rg/archives/html/xen-users/2020-02/msg00015.html
et al).

So I'm sending this report here to let you all know that this problem is now no longer limited to one person, and it is reproducible, and
is, in my opinion, severe.=C2=A0 I hope that someone here can help, or
point us in the right direction.=C2=A0 Here we go:

Problem:=C2=A0 Xen DomU guests randomly stall under high network/disk
loads.=C2=A0 Dom0 is not affected.=C2=A0 Randomly means anywhere between 1 = hour
and 14 days after guest boot - the time seems to shorten with (or
perhaps the problem is triggered by) increased network (and possibly
disk) activity.

Symptoms on the DomU Guest:
1. Guest machine performs normally until the moment of failure.=C2=A0 No abnormal log/console entries exist.
2. At the moment of failure, the guest's network goes offline.=C2=A0 No=
abnormal log/console entries are written at that moment.
3. Processes which were trying to connect to the network start to
consume increasing amounts of CPU.
4. Load average of the guest starts to increase, continuing upward
without apparent bound.
5. If a high-priority bash shell is left logged in on the guest hvc0
console, some commands might still be runnable; most are not.
6. If the guest console is not logged in, the console is frozen and
doesn't even echo characters.
7. Some guests will output messages on the console like this:
kernel: [164084.912966] NMI watchdog: BUG: soft lockup - CPU#16 stuck for 6= 7s!
8. On some others,=C2=A0 I will also see output like:
BUG: workqueue lockup - pool cpus=3D20 node=3D0 flags=3D0x0 nice=3D-20 stuc= k for 70s!
9. Sometimes there is no output at all on the console.

Symptoms on the Dom0 Host:
1. The Dom0 Host is unaffected.=C2=A0 The only indication anything is
happening on the host are two log entries in /var/log/messages:
vif vif-6-0 vif6.0: Guest Rx stalled
br0: port 2(vif6.0) entered disabled state
2. Other guests are not affected (Although other guests too may stall
at other random times, stalls on one guest do not seem to affect other
guests directly.)

Circumstances when the problem first occurred:
1. All hosts and guests were previously on Xen 4.9.4 (OpenSuse 42.3,
Linux 4.4.180, Xen 4.9.4)
2. I upgraded one physical host to Xen 4.12.1 (OpenSuse 15.1, Linux
4.12.14, Xen 4.12.1).
3. The guest(s) on that host started malfunctioning at that point.

Immediate steps taken while the guest was stalled, which did not help:
1. Tried to use high-priority shell on guest console to kill high-CPU
processes; they were unkillable.
2. Tried to use guest console to stop and restart network; commands
were unresponsive.
3. Tried to use guest console to shutdown/init 0.=C2=A0 This caused console=
to be terminated, but guest would not otherwise shutdown.
4. Tried to use host xl interface to unplug/replug network bridges.
This appeared to work from host side, but guest was unaffected.

One thing which I accidentally discovered that *did* help:
1. Tried sending xl trigger nmi from the host to the guest.

When I trigger the stalled guest with an NMI, I get its attention.
The guest will print the following on the console:

Uhhuh. NMI received for unknown reason 00 on CPU 0.
Do you have a strange power saving mode enabled?
Dazed and confused, but trying to continue

In some cases (pattern not yet known), the guest will then immediately
come back online:=C2=A0 The network will come back online, and all
processes will slowly stop consuming CPU, and things will return to
normal.=C2=A0 =C2=A0Existing network connections were obviously terminated,= but
new connections are accepted.=C2=A0 In that case, it's like the guest j= ust
magically comes back to life.

When this works, the host log shows:
vif vif-6-0 vif6.0: Guest Rx ready
br0: port 2(vif6.0) entered blocking state
br0: port 2(vif6.0) entered forwarding state

And all seems well... as if the guest had never stalled.

However, this is not reliable.=C2=A0 In most cases, the guest will print those messages, but the processes will NOT recover, and the network
will come back impaired, or not at all.=C2=A0 When that happens, repeated NMIs do not help:=C2=A0 If the guest doesn't recover the first time, it=
doesn't recover at all.

The *only* reliable way to recover is to destroy the guest completely,
and recreate it.=C2=A0 This is a hard destroy:=C2=A0 the guest cannot shut<= br> itself down.=C2=A0 The guest will then run fine... until the next stall. But of course a hard-destroy can't be a healthy thing for a guest
machine, and that's really not a solution.

Long-term mitigation steps which were tried which did not help.
1. Thought this was an SSH bug (since sshd processes were consuming
high CPU), installed latest OpenSSH.
2. Though maybe a PV problem, tried under HVM instead of PV.
3. Noted a problem with grant frames, applied the recommended fix for
that, my config now looks like:
# xen-diag gnttab_query_size 0 # Domain-0
domid=3D0: nr_frames=3D1, max_nr_frames=3D64
# xen-diag gnttab_query_size 1 # Xenstore
domid=3D1: nr_frames=3D4, max_nr_frames=3D4
# xen-diag gnttab_query_size 6 # My guest
domid=3D6: nr_frames=3D17, max_nr_frames=3D256
4. Thought maybe a kernel module might be at issue, reviewed list with
OpenSuse team, pruned modules.
5. Thought this might be a kernel mismatch, was referred to a new
kernel by OpenSuse team (Linux 4.12.13 for OpenSuse 42.3).=C2=A0 That
changed some of the console output behavior and logging, but did not
solve the problem.
6. Thought this might be a general OS mismatch, tried upgrading the
guest to the same OS/Xen versions as the host (OpenSuse 15.1/Linux
4.12.14/Xen 4.12.1).=C2=A0 In this configuration, no console or log output<= br> is generated on the guest at all, it just stalls.
7. Assumed (incorrectly, it now turns out) that something was just
"wrong" with my guest, tried a fresh load of host, and a fresh gu= est.
I thought that would solve it, but to my sadness, it did not.

Which means that this is now a reproducible bug.

Steps to reproduce:
1. Get a server.=C2=A0 I'm using a Dell PowerEdge R720, but this has happened on several different Dell models.=C2=A0 My current server has two<= br> 16-core CPUs, and 128GB of RAM.
2. Load Xen 4.12.1 (OpenSuse 15.1/Xen 4.12.1) on the server.=C2=A0 Boot it<= br> up in Xen Dom0/host mode.
3. Create a new guest machine, also with 4.12.1.
4. Fire up the guest.
5. Put a lot of data on the guest (my guest has 3 TB of files and data). 6. Plug a crossover cable into your server, and plug the other end
into some other Linux machine.
7. From that other machine, start pounding the guest.=C2=A0 An rsync of the=
entire data partition is a great way to trigger this.=C2=A0 If I run
several outbound rsyncs together, I can crash my guest in under 48
hours.=C2=A0 If I run 4 or 5, I can often crash the guest in just 2 hours.<= br> If you don't want to damage your SSDs on your other machine, here's= my
current command (my host is 192.168.1.10, and my guest is
192.168.1.11, so I plug in some other machine and make it, say,
192.168.1.12, and then run:

nohup ssh 192.168.1.11 tar cf - --one-file-system /a | cat > /dev/null &= amp;

Where /a is my directory full of user data.=C2=A0 4-6 of these running
simultaneously will bring the guest to its knees in short order.

On my most recent test, I did the NMI trigger thing, and found this in
the guest's /var/log/messages after sending the trigger (I've remov= ed
tagging and timestamping for clarity:)

Uhhuh. NMI received for unknown reason 00 on CPU 0.
Do you have a strange powersaving mode enabled?
Dazed and confused, but trying to continue
clocksource: timekeeping watchdog on CPU0: Marking clocksource 'tsc'= ;
as unstable because the skew is too large:
clocksource: 'xen' wd_now: 58842b687eb3c wd_last: 55aa97ff29565 mas= k:
ffffffffffffffff
clocksource: 'tsc' cs_now: 58d3355ea9a87e cs_last: 585cca21d4f074 mask: ffffffffffffffff
tsc: Marking TSC unstable due to clocksource watchdog
BUG: workqueue lockup - pool cpus=3D0 node=3D0 flags=3D0x0 nice=3D-20 stuck= for 50117s!
Showing busy workqueues and worker pools:
workqueue events: flags=3D0x0
=C2=A0 =C2=A0pwq 0: cpus=3D0 node=3D0 flags=3D0x0 nice=3D0 active=3D3/256 =C2=A0 =C2=A0 =C2=A0pending: clocksource_watchdog_work, vmstat_shepherd, ca= che_reap
workqueue mm_percpu_wq: flags=3D0x8
=C2=A0 =C2=A0pwq 0: cpus=3D0 node=3D0 flags=3D0x0 nice=3D0 active=3D1/256 =C2=A0 =C2=A0 =C2=A0pending: vmstat_update
workqueue writeback: flags=3D0x4e
=C2=A0 =C2=A0pwq 52: cpus=3D0-25 flags=3D0x4 nice=3D0 active=3D1/256
=C2=A0 =C2=A0 =C2=A0in-flight: 28593:wb_workfn
workqueue kblockd: flags=3D0x18
=C2=A0 =C2=A0pwq 1: cpus=3D0 node=3D0 flags=3D0x0 nice=3D-20 active=3D2/256=
=C2=A0 =C2=A0 =C2=A0pending: blk_mq_run_work_fn, blk_mq_timeout_work
pool 52: cpus=3D0-25 flags=3D0x4 nice=3D0 hung=3D0s workers=3D3 idle: 32044= 18125

That led me to search around, and I tripped over this:
https://wiki.debian.org/Xen/Clocksource , which describes= a guest
hanging with the message "clocksource/0: Time went backwards/" Although I did not see this message, and this is not directly on point
with OpenSuse (since our /proc structure doesn't include some of the switches mentioned), I did notice clocksource references in the logs
(see above), and that led me back to:
https:/= /doc.opensuse.org/documentation/leap/virtualization/html/book.virt/cha-xen-= manage.html,
and specifically the tsc_mode setting.=C2=A0 I have no idea if it's
relevant, but I since I'm out of ideas and have nothing better to try,<= br> I have now booted my guest into tsc_mode=3D1 and am stress testing it to see if it fares any better this way.

Administrivia:
OS: OpenSuse 15.1
Linux: 4.12.14-lp151.28.36
Xen: 4.12.1
Dom0 boot parameters: dom0_mem=3D4G dom0_max_vcpus=3D4 dom0_vcpus_pin
gnttab_max_frames=3D256
Xen guest config:

name=3D"guest1"
description=3D"guest1"
memory=3D90112
maxmem=3D90112
vcpus=3D26
cpus=3D"4-31"
on_poweroff=3D"destroy"
on_reboot=3D"restart"
on_crash=3D"restart"
on_watchdog=3D"restart"
localtime=3D0
keymap=3D"en-us"
type=3D"pv"
kernel=3D"/usr/lib/grub2/x86_64-xen/grub.xen"
extra=3D"elevator=3Dnoop"
disk=3D[
=C2=A0 =C2=A0 =C2=A0 =C2=A0 '/xen/guest1/guest1.root,raw,xvda1,w',<= br> =C2=A0 =C2=A0 =C2=A0 =C2=A0 '/xen/guest1/guest1.swap,raw,xvda2,w',<= br> =C2=A0 =C2=A0 =C2=A0 =C2=A0 '/xen/guest1/guest1.xa,raw,xvda3,w', =C2=A0 =C2=A0 =C2=A0 =C2=A0 ]
vif=3D[
=C2=A0 =C2=A0 =C2=A0 =C2=A0 'rate=3D100Mb/s,mac=3D00:16:3f:49:4a:41,bri= dge=3Dbr0',
=C2=A0 =C2=A0 =C2=A0 =C2=A0 ]
vfb=3D['type=3Dvnc,vncunused=3D1']

I had originally thought that I was the only person with this problem,
and that's why I thought a fresh guest would fix it - the problem
followed me around different servers, so that made sense.=C2=A0 Over the past weeks I've set up a fresh guest on my fresh host, and, just on a whim, did the above stress testing on it... sadly, it only lasted for
36 hours.=C2=A0 On the older Xen 4.9, I *never* encountered problems, and nothing changed other than OS/Xen versions when I did the upgrades to
the new versions.

Since I can now reproduce the problem on different hardware and
setups, I thought I'd start my searches over again.=C2=A0 To my relief,= I
found that, just in the past few weeks, another person has now
reported what seems to be the same problem, only he reported it to
this list (whereas I had sent my report to OpenSuse.)=C2=A0 In his message,=
referenced above, he states that the problem is limited to Xen 4.12
and 4.13, and that rolling back to Xen 4.11 solves the problem.

If that's right, there seems to be a *significant* problem somewhere, and it's clearly no longer just one instance.

I am looking for a means on Xen to bug report this; so far, I haven't found it, but I will keep looking.

Meanwhile, I'm hoping that these details and history spark something for some of you here.=C2=A0 Do any of you have any ideas on this?=C2=A0 Any=
thoughts, guidance, musings, etc., anything at all would be
appreciated.

Again, thank you all for your patience and help, I am very grateful!

Glen

_______________________________________________
Xen-users mailing list
Xen-use= rs@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo= /xen-users


Hello Glen, t= hanks for your report.

The symptoms seem similar:
- xen 4.12
-= 2 cpu
- high load
- dom0 is ok, domU stalls

I've just upg= raded one of my machines to xen 4.12 (again) with sched=3Dcredit, I'll = report back if it helps.

Thanks,
Tomas
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Subject: Re: [Xen-users] Xen 4.12 DomU hang / freeze / stall under high network/disk load X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: xen-users@lists.xenproject.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" T24gRnJpLCBGZWIgMTQsIDIwMjAgYXQgMTI6MDcgQU0gVG9tYXMgTW96ZXMgPGh5ZHJhcG9saWNA Z21haWwuY29tPiB3cm90ZToKPiBIZWxsbyBHbGVuLCB0aGFua3MgZm9yIHlvdXIgcmVwb3J0LgoK VGhhbmsgeW91IQoKPiBUaGUgc3ltcHRvbXMgc2VlbSBzaW1pbGFyOgo+IC0geGVuIDQuMTIKPiAt IDIgY3B1Cj4gLSBoaWdoIGxvYWQKPiAtIGRvbTAgaXMgb2ssIGRvbVUgc3RhbGxzCgpZZXMsIHNh bWUgaGVyZS4KCj4gSSd2ZSBqdXN0IHVwZ3JhZGVkIG9uZSBvZiBteSBtYWNoaW5lcyB0byB4ZW4g NC4xMiAoYWdhaW4pIHdpdGggc2NoZWQ9Y3JlZGl0LCBJJ2xsIHJlcG9ydCBiYWNrIGlmIGl0IGhl bHBzLgoKVGhhbmtzLiAgUmlnaHQgbm93IEknbSBmb2N1c2VkIG9uIHRzY19tb2RlLCBzaW5jZSBp 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<8dde6fbd-6e46-c4b8-36fc-df118ff8e008@prgmr.com> Date: Fri, 14 Feb 2020 10:36:04 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Subject: Re: [Xen-users] Xen 4.12 DomU hang / freeze / stall under high network/disk load X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: xen-users@lists.xenproject.org Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" T24gMi8xNC8yMCA5OjAwIEFNLCBHbGVuIHdyb3RlOgo+IE9uIEZyaSwgRmViIDE0LCAyMDIwIGF0 IDEyOjA3IEFNIFRvbWFzIE1vemVzIDxoeWRyYXBvbGljQGdtYWlsLmNvbT4gd3JvdGU6Cj4+IEhl bGxvIEdsZW4sIHRoYW5rcyBmb3IgeW91ciByZXBvcnQuCj4gCj4gVGhhbmsgeW91IQo+IAo+PiBU aGUgc3ltcHRvbXMgc2VlbSBzaW1pbGFyOgo+PiAtIHhlbiA0LjEyCj4+IC0gMiBjcHUKPj4gLSBo 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[99.7.172.215]) by smtp.gmail.com with ESMTPSA id d15sm8898718pgn.6.2020.02.14.19.07.24 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 14 Feb 2020 19:07:25 -0800 (PST) To: Glen References: <8dde6fbd-6e46-c4b8-36fc-df118ff8e008@prgmr.com> From: PGNet Dev Message-ID: Date: Fri, 14 Feb 2020 19:07:24 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Subject: Re: [Xen-users] Xen 4.12 DomU hang / freeze / stall under high network/disk load X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Reply-To: pgnet.dev@gmail.com Cc: xen-users@lists.xenproject.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" 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--===============3969175757143341401== Content-Type: multipart/alternative; boundary="000000000000daaf14059e976757" --000000000000daaf14059e976757 Content-Type: text/plain; charset="UTF-8" On Sat, Feb 15, 2020 at 3:58 AM Glen wrote: > Tomas - > > In your previous report, before I showed up, you wrote: > > I've tried Xen 4.12 and the latest staging Xen 4.13, both behave the > same. Doesn't matter if kernel 4.14 or 5.4 is used. > > Now PGNet Dev has said: > > On Fri, Feb 14, 2020 at 5:54 PM PGNet Dev wrote: > > When I switched to openSUSE Xen 4.13.0_04 packages with KernelStable > (atm, 5.5.3-25.gd654690), Guests of all 'flavors' became *much* better > behaved. > > They used a later kernel than you cited - I'm wondering about the > relationship between their "Xen 4.13.0_04" and your "latest staging > Xen 4.13". > > Any thoughts or insight there? > > Thanks! > Glen > Glen, I've used release 4.13.0 with all patches from the staging-4.13 branch: https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=refs/heads/staging-4.13 IIRC it was commit https://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=721f2c323ca55c77857c93e7275b4a93a0e15e1f I'd prefer to stick to kernel 5.4 as it's the latest LTS. I don't really know what "much better behaved" means. With xen 4.11 I have no issues with Xen and anything newer is causing stalls, so in my case it's either all good or bad on selected busy hosts :) Tomas --000000000000daaf14059e976757 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Sat, Feb 15, 2020 at 3:58 AM Glen = <glenbarney@gmail.com> wr= ote:
Tomas -

In your previous report, before I showed up, you wrote:
> I've tried Xen 4.12 and the latest staging Xen 4.13, both behave t= he same. Doesn't matter if kernel 4.14 or 5.4 is used.

Now PGNet Dev has said:

On Fri, Feb 14, 2020 at 5:54 PM PGNet Dev <pgnet.dev@gmail.com> wrote:
> When I switched to openSUSE Xen 4.13.0_04 packages with KernelStable (= atm, 5.5.3-25.gd654690), Guests of all 'flavors' became *much* bett= er behaved.

They used a later kernel than you cited - I'm wondering about the
relationship between their "Xen 4.13.0_04" and your "latest = staging
Xen 4.13".

Any thoughts or insight there?

Thanks!
Glen


Glen,
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Sun, 16 Feb 2020 09:40:43 -0800 (PST) To: xen-users@lists.xenproject.org From: Norbert Irmer Message-ID: <2a1985a7-942f-39c0-9b9e-31be92a68e62@googlemail.com> Date: Sun, 16 Feb 2020 18:40:43 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------3DB2E17994D3C2443B469D69" Content-Language: en-US X-Mailman-Approved-At: Sun, 16 Feb 2020 18:13:48 +0000 Subject: [Xen-users] AMD-Vi: Error initialization X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" This is a multi-part message in MIME format. --------------3DB2E17994D3C2443B469D69 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit I have a problem. When running xen-4.12.2 on fedora 31 with kernel 5.4.18-200.fc31.x86_64, AMD-Vi initialization fails, so I can't passthrough pci devices to vms. I am reporting this, because, when I boot fedora 31 without the xen hypervisor, AMD-Vi works, and I can passthrough devices using the Qemu/KVM stack, so I guess, this error is caused by xen amd_iommu not supporting my AMD Ryzen Threadripper 3960X 24-Core Processor/TRX40 AORUS XTREME cpu/mobo combo, and not by a bogus BIOS. I attached the output of xl dmesg, I think the relevant lines are: (XEN) IVHD Error: Invalid IO-APIC 0x80 (XEN) AMD-Vi: Error initialization (XEN) I/O virtualisation disabled To show, that IOMMU is principally working, here is the output of "dmesg -T | grep -i iommu" when booting without xen: ... [So Feb 16 17:29:03 2020] pci 0000:61:00.0: Adding to iommu group 76 [So Feb 16 17:29:03 2020] pci 0000:62:00.0: Adding to iommu group 77 [So Feb 16 17:29:03 2020] pci 0000:60:00.2: AMD-Vi: Found IOMMU cap 0x40 [So Feb 16 17:29:03 2020] pci 0000:40:00.2: AMD-Vi: Found IOMMU cap 0x40 [So Feb 16 17:29:03 2020] pci 0000:20:00.2: AMD-Vi: Found IOMMU cap 0x40 [So Feb 16 17:29:03 2020] pci 0000:00:00.2: AMD-Vi: Found IOMMU cap 0x40 [So Feb 16 17:29:03 2020] perf/amd_iommu: Detected AMD IOMMU #0 (2 banks, 4 counters/bank). [So Feb 16 17:29:03 2020] perf/amd_iommu: Detected AMD IOMMU #1 (2 banks, 4 counters/bank). [So Feb 16 17:29:03 2020] perf/amd_iommu: Detected AMD IOMMU #2 (2 banks, 4 counters/bank). [So Feb 16 17:29:03 2020] perf/amd_iommu: Detected AMD IOMMU #3 (2 banks, 4 counters/bank). [So Feb 16 17:29:06 2020] AMD-Vi: AMD IOMMUv2 driver by Joerg Roedel I also attached the output of "lshw -short". Any help would be appreciated, thanks. --------------3DB2E17994D3C2443B469D69 Content-Type: text/plain; charset=UTF-8; name="lshw-short.txt" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="lshw-short.txt" SC9XIHBhdGggICAgICAgICAgICAgICAgICAgICAgRGV2aWNlICAgICAgICAgIENsYXNzICAg ICAgICAgIERlc2NyaXB0aW9uCj09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQogICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgc3lzdGVtICAgICAgICAgVFJYNDAgQU9S VVMgWFRSRU1FIChEZWZhdWx0IHN0cmluZykKLzAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgIGJ1cyAgICAgICAgICAgIFRSWDQwIEFPUlVTIFhUUkVNRQov MC8wICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgbWVtb3J5ICAg ICAgICAgNjRLaUIgQklPUwovMC85ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgbWVtb3J5ICAgICAgICAgMTI4R2lCIFN5c3RlbSBNZW1vcnkKLzAvOS8wICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIG1lbW9yeSAgICAgICAgIDE2 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Message-ID: To: Sarah Newman Subject: Re: [Xen-users] Xen 4.12 DomU hang / freeze / stall under high network/disk load X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: xen-users@lists.xenproject.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" SGkgU2FyYWghCgpPbiBNb24sIEZlYiAxNywgMjAyMCBhdCA5OjU4IEFNIFNhcmFoIE5ld21hbiA8 c3JuQHByZ21yLmNvbT4gd3JvdGU6Cj4gT24gMi8xNy8yMCA5OjM3IEFNLCBHbGVuIHdyb3RlOgo+ ID4gVW5kZXIgNC4xMiwgbXkgZ3Vlc3RzIHdvdWxkIGNydW1wbGUgYWZ0ZXIgMjQtMzYgaG91cnMg b2YgdGhpcyB0eXBlIG9mIGxvYWRpbmcuCj4gPiBVbmRlciA0LjEwLCBteSBndWVzdCBoYXMgYmVl biB1cCBub3cgZm9yIDY4IGhvdXJzIGFuZCAtIGFmdGVyIGFib3V0IDY0Cj4gPiBob3VycywgdGhl IGFib3ZlIHRyYW5zZmVycyAqY29tcGxldGVkKi4gIFRoaXMgaGFzIG5ldmVyIGhhcHBlbmVkLiAg 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List-Help: List-Subscribe: , Cc: "xen-users@lists.xenproject.org" , Sarah Newman Content-Type: multipart/mixed; boundary="===============1984681412977416361==" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" --===============1984681412977416361== Content-Type: multipart/alternative; boundary="00000000000038a19e059ec9cbec" --00000000000038a19e059ec9cbec Content-Type: text/plain; charset="UTF-8" On Monday, February 17, 2020, Glen wrote: > Hi Sarah! > > On Mon, Feb 17, 2020 at 9:58 AM Sarah Newman wrote: >> On 2/17/20 9:37 AM, Glen wrote: >> > Under 4.12, my guests would crumple after 24-36 hours of this type of loading. >> > Under 4.10, my guest has been up now for 68 hours and - after about 64 >> > hours, the above transfers *completed*. This has never happened. No >> > guest under 4.12 has ever survived 4+ simultaneous transfers of 2.5TB >> > of data since I encountered this problem. They would all stall well >> > before the transfers could complete. In contrast, under 4.10, my same >> > guest ran at (subjectively) about half the load average, and the >> > transfers all completed, in their entirely, without any stalls. > >> 4.10 + which kernel version, just to confirm? > > Host: > OpenSuse 15.0 > Linux 4.12.14-lp150.12.82-default x86_64 > Xen version 4.10.4_06-lp150.2.25 > > Guest: (unchanged) > OpenSuse 15.1 > Linux 4.12.14-lp151.28.36-default x86_64 > > :-) > > Glen > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xenproject.org > https://lists.xenproject.org/mailman/listinfo/xen-users Just a quick note - no stall after switching to credit scheduler on xen 4.12 after 3 days. Tomas --00000000000038a19e059ec9cbec Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

On Monday, February 17, 2020, Glen <glenbarney@gmail.com> wrote:
> Hi Sarah!
>> On Mon, Feb 17, 2020 at 9:58 AM Sarah Newman <srn@prgmr.com> wrote:
>> On 2/17/20 9:37 AM, = Glen wrote:
>> > Under 4.12, my guests would crumple after 24-3= 6 hours of this type of loading.
>> > Under 4.10, my guest has = been up now for 68 hours and - after about 64
>> > hours, the a= bove transfers *completed*.=C2=A0 This has never happened.=C2=A0 No
>= > > guest under 4.12 has ever survived 4+ simultaneous transfers of 2= .5TB
>> > of data since I encountered this problem.=C2=A0 They = would all stall well
>> > before the transfers could complete.= =C2=A0 In contrast, under 4.10, my same
>> > guest ran at (subj= ectively) about half the load average, and the
>> > transfers a= ll completed, in their entirely, without any stalls.
>
>> 4.= 10 + which kernel version, just to confirm?
>
> Host:
> O= penSuse 15.0
> Linux 4.12.14-lp150.12.82-default x86_64
> Xen v= ersion 4.10.4_06-lp150.2.25
>
> Guest: (unchanged)
> Open= Suse 15.1
> Linux 4.12.14-lp151.28.36-default x86_64
>
> = :-)
>
> Glen
>
> __________________________________= _____________
> Xen-users mailing list
> Xen-users@lists.xenproject.org
> https://lis= ts.xenproject.org/mailman/listinfo/xen-users

Just a quick note -= no stall after switching to credit scheduler on xen 4.12 after 3 days.
Tomas --00000000000038a19e059ec9cbec-- --===============1984681412977416361== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLXVzZXJz IG1haWxpbmcgbGlzdApYZW4tdXNlcnNAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0 cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi11c2Vycw== --===============1984681412977416361==-- From xen-users-bounces@lists.xenproject.org Mon Feb 17 18:50:31 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 17 Feb 2020 18:50:31 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j3lSf-0001Qy-81; Mon, 17 Feb 2020 18:49:41 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j3lSe-0001Qt-14 for xen-users@lists.xenproject.org; Mon, 17 Feb 2020 18:49:40 +0000 X-Inumbo-ID: 3ff098d4-51b6-11ea-ade5-bc764e2007e4 Received: from mail.prgmr.com (unknown [2605:2700:0:5::4713:9506]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 3ff098d4-51b6-11ea-ade5-bc764e2007e4; 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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=qq0p6xMSDplX2z5bxakL6cR4IpBnmeI09Nu/VC68C+w=; b=K2w536Pzb+z3nef3g+YObFrzcAM0WNA6mZICDb2k/oF6LMs+6QEMS6zbeIcufcBcdt rtZWXjaRBzGwILVmNexUlTYIHm95k4KekxX/pp87rlXcS5yLwkf0SKcet57TmRoc1u73 s+45LUkEQ1DOHi2neBll5huD5z2kMIiaOldr+Fstng3GCgE99IynzFVwukPIx7xWC0TB I4ar/X4k0AVa7wVfDDjD8cggGi/361+8sU6IZWxPzLPi8C1dB2rO2W80ajtxVtDPMjrk BACXmdwXjj9aCW0nC/0jQp9O+46sa4COez3sBvFYifDDEQr8wlyFaYEFab3cfW/RdVV0 WG5Q== X-Gm-Message-State: APjAAAWdIy3CpNbc6nHENT2iN2EVP3w5dBcu+Px18CcPL8rSpQjiIxCn RkCvoaZDrYNpGYk1go40pXz5XV8wnX7cK3WwPTM= X-Google-Smtp-Source: APXvYqzo9legF0f6iZvnO5SZmqJWduFRoetjzw51eZ/hnwR9ZSHNAI5rBpGtyJWUUTQrPItp5nSoZXX7sfI/MXglk2Y= X-Received: by 2002:ac8:2b82:: with SMTP id m2mr14103807qtm.161.1581968135624; Mon, 17 Feb 2020 11:35:35 -0800 (PST) MIME-Version: 1.0 Received: by 2002:aed:2553:0:0:0:0:0 with HTTP; Mon, 17 Feb 2020 11:35:35 -0800 (PST) In-Reply-To: <9c49d65f-e368-900f-c200-2323cc67de9c@prgmr.com> References: <8dde6fbd-6e46-c4b8-36fc-df118ff8e008@prgmr.com> <9c49d65f-e368-900f-c200-2323cc67de9c@prgmr.com> From: Tomas Mozes Date: Mon, 17 Feb 2020 20:35:35 +0100 Message-ID: To: Sarah Newman Subject: Re: [Xen-users] Xen 4.12 DomU hang / freeze / stall under high network/disk load X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: PGNet Dev , Glen , "xen-users@lists.xenproject.org" Content-Type: multipart/mixed; boundary="===============5238482195499953671==" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" --===============5238482195499953671== Content-Type: multipart/alternative; boundary="000000000000c52404059ecaa8d4" --000000000000c52404059ecaa8d4 Content-Type: text/plain; charset="UTF-8" On Monday, February 17, 2020, Sarah Newman wrote: > On 2/17/20 10:33 AM, Tomas Mozes wrote: > >> Just a quick note - no stall after switching to credit scheduler on xen >> 4.12 after 3 days. > > That's great news. By 4.12 do you mean release 4.12.1, 4.12.2, or something else? The latest 4.12.2 release. > > I'm assuming when "PGNet Dev" reported 4.12 being bad and 4.13 being good, they were using the default scheduler of credit 2. > > It's worth asking on xen-devel if there's a known bug in the credit 2 scheduler that's been fixed. It looks like there were some significant changes to the scheduling code in between Xen 4.12 and Xen 4.13, and if one was a fix I'm not sure it would have been recognized as being so. Maybe it's a different issue, because the domu host hanged on 4.13 too. > > --Sarah > --000000000000c52404059ecaa8d4 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

On Monday, February 17, 2020, Sarah Newman <srn@prgmr.com> wrote:
> On 2/17/20 10:33 AM, Toma= s Mozes wrote:
>
>> Just a quick note - no stall after switc= hing to credit scheduler on xen
>> 4.12 after 3 days.
>
&= gt; That's great news. By 4.12 do you mean release 4.12.1, 4.12.2, or s= omething else?

The latest 4.12.2 release.

>
> I'= ;m assuming when "PGNet Dev" reported 4.12 being bad and 4.13 bei= ng good, they were using the default scheduler of credit 2.
>
>= It's worth asking on xen-devel if there's a known bug in the credi= t 2 scheduler that's been fixed. It looks like there were some signific= ant changes to the scheduling code in between Xen 4.12 and Xen 4.13, and if= one was a fix I'm not sure it would have been recognized as being so.<= br>
Maybe it's a different issue, because the domu host hanged on 4.= 13 too.

>
> --Sarah
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ESMTP id 00750ADC8; Tue, 18 Feb 2020 06:20:30 +0000 (UTC) To: Sarah Newman , Tomas Mozes , Glen References: <8dde6fbd-6e46-c4b8-36fc-df118ff8e008@prgmr.com> <9c49d65f-e368-900f-c200-2323cc67de9c@prgmr.com> From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Message-ID: Date: Tue, 18 Feb 2020 07:20:29 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <9c49d65f-e368-900f-c200-2323cc67de9c@prgmr.com> Content-Language: en-US Subject: Re: [Xen-users] Xen 4.12 DomU hang / freeze / stall under high network/disk load X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: "xen-users@lists.xenproject.org" , PGNet Dev Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" 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Tue, 18 Feb 2020 16:10:37 -0800 (PST) From: Norbert Irmer To: xen-users@lists.xenproject.org References: <2a1985a7-942f-39c0-9b9e-31be92a68e62@googlemail.com> Message-ID: <58cab9e7-7160-f941-81e4-5991250c81d4@googlemail.com> Date: Wed, 19 Feb 2020 01:10:37 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: <2a1985a7-942f-39c0-9b9e-31be92a68e62@googlemail.com> Content-Language: en-US Subject: Re: [Xen-users] AMD-Vi: Error initialization X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" U29ycnksCgp0aGUgcmVhc29uIGZvciBteSBwcm9ibGVtIF93YXNfIGEgYm9ndXMgQklPUy4gSSB1 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bHNodyAtc2hvcnQiLgo+Cj4gQW55IGhlbHAgd291bGQgYmUgYXBwcmVjaWF0ZWQsIHRoYW5rcy4K PgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLXVz ZXJzIG1haWxpbmcgbGlzdApYZW4tdXNlcnNAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9s aXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi11c2Vycw== From xen-users-bounces@lists.xenproject.org Wed Feb 19 05:47:19 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Wed, 19 Feb 2020 05:47:19 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j4IBV-000337-4T; Wed, 19 Feb 2020 05:46:09 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j4IBT-000332-O9 for xen-users@lists.xenproject.org; Wed, 19 Feb 2020 05:46:07 +0000 X-Inumbo-ID: 1f87563e-52db-11ea-ade5-bc764e2007e4 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 1f87563e-52db-11ea-ade5-bc764e2007e4; Wed, 19 Feb 2020 05:46:07 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 7A936AD5C; Wed, 19 Feb 2020 05:46:06 +0000 (UTC) To: Glen References: <8dde6fbd-6e46-c4b8-36fc-df118ff8e008@prgmr.com> <9c49d65f-e368-900f-c200-2323cc67de9c@prgmr.com> From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Message-ID: <7c9be1d3-8632-1c1a-7cd5-d10ec730dd90@suse.com> Date: Wed, 19 Feb 2020 06:45:57 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US Subject: Re: [Xen-users] Xen 4.12 DomU hang / freeze / stall under high network/disk load X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: "xen-users@lists.xenproject.org" Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" T24gMTguMDIuMjAgMjE6NTUsIEdsZW4gd3JvdGU6Cj4gT24gTW9uLCBGZWIgMTcsIDIwMjAgYXQg MTA6MjAgUE0gSsO8cmdlbiBHcm/DnyA8amdyb3NzQHN1c2UuY29tPiB3cm90ZToKPj4gSXQgd2Fz IG1lIGRvaW5nIHRoZSBtYXNzaXZlIHNjaGVkdWxpbmcgY2hhbmdlcyBpbiA0LjEzLCBhbmQgSSdt IHByZXR0eQo+PiBzdXJlIEkgbWFya2VkIHRoZSBmaXhlcyBvZiBleGlzdGluZyBidWdzIGFzIHN1 Y2guCj4+IEFsbCBmaXhlcyBoYXZlIGJlZW4gYmFja3BvcnRlZCB0byA0LjEyIGFuZCBhcmUgaW5j bHVkZWQgaW4gNC4xMi4yLgo+PiBKdWVyZ2VuCj4gCj4gSnVlcmdlbiAtCj4gCj4gVGhhbmsgeW91 IGZvciB0aGlzIQo+IAo+IE5vdGluZyB0aGUgQHN1c2UuY29tIGluIHlvdXIgZW1haWwgYWRkcmVz cywgSSdtIHdvbmRlcmluZyBpZiB5b3Uga25vdwo+IHdoZXRoZXIgNC4xMi4yIHdpbGwgYmUgcHVz aGVkIG91dCBhcyBhbiB1cGRhdGUgdG8gT3BlblN1c2UgMTUuMT8KClNob3VsZCBoYXBwZW4uCgoK SnVlcmdlbgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18K WGVuLXVzZXJzIG1haWxpbmcgbGlzdApYZW4tdXNlcnNAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0 cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi11c2Vycw== From xen-users-bounces@lists.xenproject.org Wed Feb 19 13:56:31 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Wed, 19 Feb 2020 13:56:31 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j4Poz-0001R7-VW; Wed, 19 Feb 2020 13:55:25 +0000 Received: from root by lists.xenproject.org with local (Exim 4.89) (envelope-from ) id 1j4PiS-0000H8-ES for xen-users@lists.xenproject.org; Wed, 19 Feb 2020 13:48:40 +0000 From: Ian Jackson To: xen-users@lists.xenproject.org Message-Id: Date: Wed, 19 Feb 2020 13:48:40 +0000 X-Mailman-Approved-At: Wed, 19 Feb 2020 13:55:24 +0000 Subject: [Xen-users] Xen mailing lists: dropping Subject line tags, etc. X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" SGkuIFRoaXMgbWVzc2FnZSBpcyBiZWluZyBzZW50IG9uY2UgdG8gZWFjaCBtYWlsaW5nIGxpc3Qg aG9zdGVkIGJ5CnRoZSBYZW4gUHJvamVjdC4KCkluY3JlYXNpbmdseSwgbWFpbCBzeXN0ZW1zIG9u IHRoZSBwdWJsaWMgaW50ZXJuZXQgYXJlIGRlbWFuZGluZwpyZXN0cmljdGl2ZSBTUEYgY29uZmln dXJhdGlvbnMgWzFdIGFuZCBES0lNIHNpZ25hdHVyZXMgWzJdLgoKQ3VycmVudGx5IHRoZSBYZW4g UHJvamVjdCBzeXN0ZW1zIGhhdmUgbGliZXJhbCBjb25maWd1cmF0aW9ucy4KVW5mb3J0dW5hdGVs eSB0aGlzIG1lYW5zIHRoYXQgd2UgYXJlIGhhdmluZyB0cm91YmxlIHdpdGggbWFpbHMgYmVpbmcK YmxvY2tlZCBhcyBzcGFtLiBXZSBpbnRlbmQgdG8gdGlnaHRlbiB0aGUgY29uZmlndXJhdGlvbi4K CkZvciBtYWlsaW5nIGxpc3RzLCB0aGlzIHdpbGwgbWVhbiB3ZSBuZWVkIHRvIHN0b3AgYWRkaW5n IHRoZQpbbGlzdC1uYW1lXSB0YWcgdG8gdGhlIFN1YmplY3QgbGluZSwgYW5kIHN0b3AgYWRkaW5n 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Subject: [Xen-users] xen: failed to populate ram at X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" SGVsbG8gZXZlcnlvbmUsCgpJIGFtIE1pY2suCkkgYW0gbm90IHN1cmUgSSBzaG91bGQgZGlyZWN0 bHkgcG9zdCBoZXJlLCBpZiB0aGF0J3MgYSBtaXN0YWtlLCBqdXN0CmxldCBtZSBrbm93LgoKSSBh bSB0cnlpbmcgdG8gZmluZCBhIHdheSB0byBtaWdyYXRlIGZyb20gVWJ1bnR1IDE2LjA0LnggdG8g VWJ1bnR1CjE4LjA0LnggZnJvbSBxdWl0ZSBhIGxvdCBvZiBtb250aHMgbm93LCBvbiB0aGUgc2Ft ZSBoYXJkd2FyZSwgd2l0aG91dApzdWNjZXMuCkNhdXNlIEkgaGF2ZSBhbiBpc3N1ZSB1c2luZyBt eSBVYnVudHUgMTYuMDQueCAueGwgZG9tYWluIGZpbGVzIHVuZGVyClVidW50dSAxOC4wNC54LgoK SGVyZSBpcyBhIHNhbXBsZSBvZiBvbmUgdGhhdCBkb2VzIG5vdCBib290IDoKCiMhL3Vzci9zYmlu L3hsCgpuYW1lICAgID0gJ3Rlc3QxJwpidWlsZGVyID0gJ2h2bScKdmNwdXMgICA9ICcxMicKbWVt 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WkmB6uH40tYa2b9uiJmyOdttKq0egSu4.9J3ASu0FV26CnEEm1_3bU3ZhjfC4UU3GuhgtxJYC0SP YRXBdDg-- Received: from sonic.gate.mail.ne1.yahoo.com by sonic317.consmr.mail.bf2.yahoo.com with HTTP; Wed, 19 Feb 2020 22:13:42 +0000 Date: Wed, 19 Feb 2020 22:13:42 +0000 (UTC) From: hack3rcon@yahoo.com To: xen-users@lists.xenproject.org Message-ID: <1725088539.3916250.1582150422401@mail.yahoo.com> MIME-Version: 1.0 References: <1725088539.3916250.1582150422401.ref@mail.yahoo.com> X-Mailer: WebService/1.1.15199 YMailMini Mozilla/5.0 (Linux; Android 7.1.1; BBC100-1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.99 Mobile Safari/537.36 Content-Length:325 Subject: [Xen-users] Who is the community manager? X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" SGVsbG8sCkFmdGVyIExhcnMgS3VydGgsIHdobyBpcyB0aGUgY29tbXVuaXR5IG1hbmFnZXIgb2Yg dGhlIFhlbiBQcm9qZWN0PwoKQ2hlZXIuCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fXwpYZW4tdXNlcnMgbWFpbGluZyBsaXN0Clhlbi11c2Vyc0BsaXN0cy54 ZW5wcm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL21haWxtYW4vbGlzdGlu Zm8veGVuLXVzZXJz From xen-users-bounces@lists.xenproject.org Thu Feb 20 09:31:39 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Thu, 20 Feb 2020 09:31:39 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j4iA7-0003MV-Lb; Thu, 20 Feb 2020 09:30:27 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j4iA6-0003MM-BN for xen-users@lists.xenproject.org; Thu, 20 Feb 2020 09:30:26 +0000 X-Inumbo-ID: 9e9e2ae0-53c3-11ea-84f0-12813bfff9fa Received: from mail.linuxsolutions.fi (unknown [185.189.149.168]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 9e9e2ae0-53c3-11ea-84f0-12813bfff9fa; Thu, 20 Feb 2020 09:30:23 +0000 (UTC) Received: from [81.209.93.154] (unknown [81.209.93.154]) by mail.linuxsolutions.fi (Postfix) with ESMTPSA id CF13F9FD9C; Thu, 20 Feb 2020 11:10:33 +0200 (EET) To: xen-users@lists.xenproject.org From: johnny Strom Message-ID: <5a491a85-47e8-2a44-50b0-427b3df07b4a@linuxsolutions.fi> Date: Thu, 20 Feb 2020 11:10:33 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 Content-Language: en-US Subject: [Xen-users] Domu windows 2012 crash. 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(envelope-from ) id 1j67to-0001xI-EK; Mon, 24 Feb 2020 07:11:28 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j67tn-0001xD-Dm for xen-users@lists.xenproject.org; Mon, 24 Feb 2020 07:11:27 +0000 X-Inumbo-ID: dec9c6f6-56d4-11ea-bc8e-bc764e2007e4 Received: from mail-qk1-x72f.google.com (unknown [2607:f8b0:4864:20::72f]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id dec9c6f6-56d4-11ea-bc8e-bc764e2007e4; Mon, 24 Feb 2020 07:11:26 +0000 (UTC) Received: by mail-qk1-x72f.google.com with SMTP id p7so7832881qkh.10 for ; Sun, 23 Feb 2020 23:11:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=rZor+/qlu9XOA9/cGQfwY0BlAOm0yq1h1BTCdpKEyns=; b=QWdYcBvAaA8pvnIr4jzuk42FTShLQz4owJUwEGCluJLbUooGyBzPuS0VaI3dP10zCP KcPzVA3Z2NAE0Rchv+Wdto6dlvzi6PHFu2Jz/1wZ0KvO6R/YTHBXptBFqe4EapTUjH/v 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APXvYqziJ82IPSyczuZZ01Ys+9jhw+/ae4X+bFWRcRevYvPLKGdQ/Q7vSdp/nPbMiIz6tbDHpC5JyakaFVEm/Ng29zw= X-Received: by 2002:a37:5285:: with SMTP id g127mr47168129qkb.315.1582528285274; Sun, 23 Feb 2020 23:11:25 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Tomas Mozes Date: Mon, 24 Feb 2020 08:11:13 +0100 Message-ID: To: xen-users@lists.xenproject.org Subject: Re: [Xen-users] xen domU stall on 4.12.1 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============0749785586660830051==" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" --===============0749785586660830051== Content-Type: multipart/alternative; boundary="0000000000004a8ed3059f4d14c3" --0000000000004a8ed3059f4d14c3 Content-Type: text/plain; charset="UTF-8" On Thu, Feb 6, 2020 at 8:06 AM Tomas Mozes wrote: > > > > On Mon, Jan 27, 2020 at 2:42 PM Tomas Mozes wrote: > >> >> >> On Tue, Jan 7, 2020 at 8:29 AM Tomas Mozes wrote: >> >>> Hello, >>> I've tried upgrading one of my long running Xen-dom0 machines from Xen >>> 4.11.3 to 4.12.1. It's been working fine for several days, but after that >>> one of the domUs failed the monitoring checks and it was impossible to >>> access it via ssh. From the monitoring it's visible that the load just >>> starts to grow linearly (the memory consumption grows too as new monitoring >>> processes are spawned and don't finish) and the machine is simply stuck. It >>> happened 3 times during the last 3 weeks. The Dom0 is working fine, just >>> one of the domUs is stuck (always the same domU is stuck). >>> >>> Xen got upgraded 19.12.2019, the first lockup happened 26.12.2019, then >>> 28.12.2019 and 5.1.2020. >>> >>> The domU kernel log is full of these messages: >>> Jan 5 13:19:20 kernel: [680493.141103] INFO: rcu_sched detected stalls >>> on CPUs/tasks: >>> Jan 5 13:19:20 kernel: [680493.141107] (detected by 12, >>> t=147012 jiffies, g=72555998, c=72555997, q=89937) >>> Jan 5 13:19:20 kernel: [680493.141112] All QSes seen, last rcu_sched >>> kthread activity 147012 (4975178416-4975031404), jiffies_till_next_fqs=3, >>> root ->qsmask 0x0 >>> Jan 5 13:19:20 kernel: [680493.141114] php-fpm R running task >>> 14024 17581 2249 0x00000000 >>> Jan 5 13:19:20 kernel: [680493.141120] Call Trace: >>> Jan 5 13:19:20 kernel: [680493.141124] >>> Jan 5 13:19:20 kernel: [680493.141131] sched_show_task.cold+0xb4/0xcb >>> Jan 5 13:19:20 kernel: [680493.141135] >>> rcu_check_callbacks.cold+0x36d/0x3ba >>> Jan 5 13:19:20 kernel: [680493.141138] update_process_times+0x24/0x60 >>> Jan 5 13:19:20 kernel: [680493.141143] tick_sched_handle+0x30/0x50 >>> Jan 5 13:19:20 kernel: [680493.141145] tick_sched_timer+0x30/0x70 >>> Jan 5 13:19:20 kernel: [680493.141147] ? tick_sched_do_timer+0x40/0x40 >>> Jan 5 13:19:20 kernel: [680493.141149] __hrtimer_run_queues+0xbc/0x1f0 >>> Jan 5 13:19:20 kernel: [680493.141153] hrtimer_interrupt+0xa0/0x1d0 >>> Jan 5 13:19:20 kernel: [680493.141158] xen_timer_interrupt+0x1e/0x30 >>> Jan 5 13:19:20 kernel: [680493.141162] >>> __handle_irq_event_percpu+0x3d/0x160 >>> Jan 5 13:19:20 kernel: [680493.141164] >>> handle_irq_event_percpu+0x1c/0x60 >>> Jan 5 13:19:20 kernel: [680493.141168] handle_percpu_irq+0x32/0x50 >>> Jan 5 13:19:20 kernel: [680493.141171] generic_handle_irq+0x1f/0x30 >>> Jan 5 13:19:20 kernel: [680493.141175] >>> __evtchn_fifo_handle_events+0x13f/0x150 >>> Jan 5 13:19:20 kernel: [680493.141181] __xen_evtchn_do_upcall+0x53/0x90 >>> Jan 5 13:19:20 kernel: [680493.141186] xen_evtchn_do_upcall+0x22/0x40 >>> Jan 5 13:19:20 kernel: [680493.141191] >>> xen_hvm_callback_vector+0x85/0x90 >>> Jan 5 13:19:20 kernel: [680493.141192] >>> Jan 5 13:19:20 kernel: [680493.141194] RIP: 0033:0x56398dc8a959 >>> Jan 5 13:19:20 kernel: [680493.141195] RSP: 002b:00007ffdd588d3d0 >>> EFLAGS: 00000246 ORIG_RAX: ffffffffffffff0c >>> Jan 5 13:19:20 kernel: [680493.141197] RAX: 0000000000000060 RBX: >>> 00007f6ea3aa02e0 RCX: 0000000000000000 >>> Jan 5 13:19:20 kernel: [680493.141198] RDX: 00007f6ea3aa02a0 RSI: >>> 00007ffdd588d3d8 RDI: 00007ffdd588d3e0 >>> Jan 5 13:19:20 kernel: [680493.141199] RBP: 00007f6ea3a9b5b0 R08: >>> 00007f6ea49be770 R09: 00007f6ea483cdc0 >>> Jan 5 13:19:20 kernel: [680493.141200] R10: 00007f6eae520a40 R11: >>> 00007f6eae4933c0 R12: 00005639902892a0 >>> Jan 5 13:19:20 kernel: [680493.141201] R13: 0000000000000000 R14: >>> 00007f6eae41e930 R15: 00007f6ea7077138 >>> Jan 5 13:19:20 kernel: [680493.141204] rcu_sched kthread starved for >>> 147012 jiffies! g72555998 c72555997 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x200 >>> ->cpu=3 >>> Jan 5 13:19:20 kernel: [680493.141205] rcu_sched R15016 8 >>> 2 0x80000000 >>> Jan 5 13:19:20 kernel: [680493.141210] Call Trace: >>> Jan 5 13:19:20 kernel: [680493.141215] ? __schedule+0x24e/0x710 >>> Jan 5 13:19:20 kernel: [680493.141216] schedule+0x2d/0x80 >>> Jan 5 13:19:20 kernel: [680493.141219] schedule_timeout+0x16c/0x340 >>> Jan 5 13:19:20 kernel: [680493.141221] ? call_timer_fn+0x130/0x130 >>> Jan 5 13:19:20 kernel: [680493.141222] rcu_gp_kthread+0x486/0xd60 >>> Jan 5 13:19:20 kernel: [680493.141224] kthread+0xfd/0x130 >>> Jan 5 13:19:20 kernel: [680493.141226] ? force_qs_rnp+0x170/0x170 >>> Jan 5 13:19:20 kernel: [680493.141227] ? __kthread_parkme+0x90/0x90 >>> Jan 5 13:19:20 kernel: [680493.141228] ret_from_fork+0x35/0x40 >>> >>> Xen-dom0 is running kernel 4.14.158 and these xen command line options: >>> GRUB_CMDLINE_XEN="dom0_mem=4G gnttab_max_frames=256 ucode=scan loglvl=all >>> guest_loglvl=all console_to_ring console_timestamps=date conring_size=1m >>> smt=true iommu=no-intremap" >>> >>> Xen-domU config: >>> name = "machine" >>> kernel = "kernel-4.14.159-gentoo-xen" >>> memory = 10000 >>> vcpus = 16 >>> vif = [ '' ] >>> disk = [ >>> '...root,raw,xvda,rw', >>> '...opt,raw,xvdc,rw', >>> '...home,raw,xvdb,rw', >>> '...tmp,raw,xvdd,rw', >>> '...var,raw,xvde,rw', >>> ] >>> extra = "root=/dev/xvda net.ifnames=0 console=ttyS0 >>> console=ttyS0,38400n8" >>> type = "hvm" >>> sdl = 0 >>> vnc = 0 >>> serial='pty' >>> xen_platform_pci=1 >>> max_grant_frames = 256 >>> >>> I've had issues like this in the past with the grant frames (basically >>> this issue https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=880554), >>> maybe some other value needs to be raised too? >>> >>> Thanks, >>> Tomas >>> >> >> Reproduced on another HP machine. The previous one was HP ProLiant DL360 >> G7 with 2x Intel Xeon E5620 @ 2.40GHz. The other is HP ProLiant DL360p Gen8 >> with 2x Intel Xeon CPU E5-2630 @ 2.30GHz. >> >> The strange thing is this does not happen on our testing machine (but has >> lower load of course) - that's a Supermicro X10DRW with 1x Intel Xeon CPU >> E5-2620 v3 @ 2.40GHz. >> > > > Just an update, I've tried Xen 4.12 and the latest staging Xen 4.13, both > behave the same. Doesn't matter if kernel 4.14 or 5.4 is used. Right after > the Xen version is reverted back to 4.11, everything works just fine, > nothing else needs to be changed. > > I've tried adding "mitigations=off" to kernel options and "spec-ctrl=false > xpti=false pv-l1tf=false tsx=true" to Xen options, but it didn't help > either. > > Thanks, > Tomas > As reported in https://lists.xenproject.org/archives/html/xen-devel/2020-01/msg00361.html and https://lists.xenproject.org/archives/html/xen-users/2020-02/msg00042.html, switching back to credit1 scheduler seems to make it working again. I've migrated 6 machines to Xen 4.12 with sched=credit xen option and haven't observed a hang for more than a week now. Thanks, Tomas --0000000000004a8ed3059f4d14c3 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Thu, Feb 6, 2020 at 8:06 AM Tomas = Mozes <hydrapolic@gmail.com&= gt; wrote:



On Mon, Jan 27,= 2020 at 2:42 PM Tomas Mozes <hydrapolic@gmail.com> wrote:

<= /div>
O= n Tue, Jan 7, 2020 at 8:29 AM Tomas Mozes <hydrapolic@gmail.com> wrote:
<= blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-l= eft:1px solid rgb(204,204,204);padding-left:1ex">
Hello,I've tried upgrading one of my long running Xen-dom0 machines from Xen= 4.11.3 to 4.12.1. It's been working fine for several days, but after t= hat one of the domUs failed the monitoring checks and it was impossible to = access it via ssh. From the monitoring it's visible that the load just = starts to grow linearly (the memory consumption grows too as new monitoring= processes are spawned and don't finish) and the machine is simply stuc= k. It happened 3 times during the last 3 weeks. The Dom0 is working fine, j= ust one of the domUs is stuck (always the same domU is stuck).

Xen g= ot upgraded 19.12.2019, the first lockup happened 26.12.2019, then 28.12.20= 19 and 5.1.2020.

The domU kernel log is full of these messages:
J= an =C2=A05 13:19:20 kernel: [680493.141103] INFO: rcu_sched detected stalls= on CPUs/tasks:
Jan =C2=A05 13:19:20 kernel: [680493.141107] =C2=A0 =C2= =A0 =C2=A0 =C2=A0 (detected by 12, t=3D147012 jiffies, g=3D72555998, c=3D72= 555997, q=3D89937)
Jan =C2=A05 13:19:20 kernel: [680493.141112] All QSes= seen, last rcu_sched kthread activity 147012 (4975178416-4975031404), jiff= ies_till_next_fqs=3D3, root ->qsmask 0x0
Jan =C2=A05 13:19:20 kernel:= [680493.141114] php-fpm =C2=A0 =C2=A0 =C2=A0 =C2=A0 R =C2=A0running task = =C2=A0 =C2=A014024 17581 =C2=A0 2249 0x00000000
Jan =C2=A05 13:19:20 ker= nel: [680493.141120] Call Trace:
Jan =C2=A05 13:19:20 kernel: [680493.14= 1124] =C2=A0<IRQ>
Jan =C2=A05 13:19:20 kernel: [680493.141131] =C2= =A0sched_show_task.cold+0xb4/0xcb
Jan =C2=A05 13:19:20 kernel: [680493.1= 41135] =C2=A0rcu_check_callbacks.cold+0x36d/0x3ba
Jan =C2=A05 13:19:20 k= ernel: [680493.141138] =C2=A0update_process_times+0x24/0x60
Jan =C2=A05 = 13:19:20 kernel: [680493.141143] =C2=A0tick_sched_handle+0x30/0x50
Jan = =C2=A05 13:19:20 kernel: [680493.141145] =C2=A0tick_sched_timer+0x30/0x70Jan =C2=A05 13:19:20 kernel: [680493.141147] =C2=A0? tick_sched_do_timer+= 0x40/0x40
Jan =C2=A05 13:19:20 kernel: [680493.141149] =C2=A0__hrtimer_r= un_queues+0xbc/0x1f0
Jan =C2=A05 13:19:20 kernel: [680493.141153] =C2=A0= hrtimer_interrupt+0xa0/0x1d0
Jan =C2=A05 13:19:20 kernel: [680493.141158= ] =C2=A0xen_timer_interrupt+0x1e/0x30
Jan =C2=A05 13:19:20 kernel: [6804= 93.141162] =C2=A0__handle_irq_event_percpu+0x3d/0x160
Jan =C2=A05 13:19:= 20 kernel: [680493.141164] =C2=A0handle_irq_event_percpu+0x1c/0x60
Jan = =C2=A05 13:19:20 kernel: [680493.141168] =C2=A0handle_percpu_irq+0x32/0x50<= br>Jan =C2=A05 13:19:20 kernel: [680493.141171] =C2=A0generic_handle_irq+0x= 1f/0x30
Jan =C2=A05 13:19:20 kernel: [680493.141175] =C2=A0__evtchn_fifo= _handle_events+0x13f/0x150
Jan =C2=A05 13:19:20 kernel: [680493.141181] = =C2=A0__xen_evtchn_do_upcall+0x53/0x90
Jan =C2=A05 13:19:20 kernel: [680= 493.141186] =C2=A0xen_evtchn_do_upcall+0x22/0x40
Jan =C2=A05 13:19:20 ke= rnel: [680493.141191] =C2=A0xen_hvm_callback_vector+0x85/0x90
Jan =C2=A0= 5 13:19:20 kernel: [680493.141192] =C2=A0</IRQ>
Jan =C2=A05 13:19:= 20 kernel: [680493.141194] RIP: 0033:0x56398dc8a959
Jan =C2=A05 13:19:20= kernel: [680493.141195] RSP: 002b:00007ffdd588d3d0 EFLAGS: 00000246 ORIG_R= AX: ffffffffffffff0c
Jan =C2=A05 13:19:20 kernel: [680493.141197] RAX: 0= 000000000000060 RBX: 00007f6ea3aa02e0 RCX: 0000000000000000
Jan =C2=A05 = 13:19:20 kernel: [680493.141198] RDX: 00007f6ea3aa02a0 RSI: 00007ffdd588d3d= 8 RDI: 00007ffdd588d3e0
Jan =C2=A05 13:19:20 kernel: [680493.141199] RBP= : 00007f6ea3a9b5b0 R08: 00007f6ea49be770 R09: 00007f6ea483cdc0
Jan =C2= =A05 13:19:20 kernel: [680493.141200] R10: 00007f6eae520a40 R11: 00007f6eae= 4933c0 R12: 00005639902892a0
Jan =C2=A05 13:19:20 kernel: [680493.141201= ] R13: 0000000000000000 R14: 00007f6eae41e930 R15: 00007f6ea7077138
Jan = =C2=A05 13:19:20 kernel: [680493.141204] rcu_sched kthread starved for 1470= 12 jiffies! g72555998 c72555997 f0x2 RCU_GP_WAIT_FQS(3) ->state=3D0x200 = ->cpu=3D3
Jan =C2=A05 13:19:20 kernel: [680493.141205] rcu_sched =C2= =A0 =C2=A0 =C2=A0 R15016 =C2=A0 =C2=A0 8 =C2=A0 =C2=A0 =C2=A02 0x80000000Jan =C2=A05 13:19:20 kernel: [680493.141210] Call Trace:
Jan =C2=A05 1= 3:19:20 kernel: [680493.141215] =C2=A0? __schedule+0x24e/0x710
Jan =C2= =A05 13:19:20 kernel: [680493.141216] =C2=A0schedule+0x2d/0x80
Jan =C2= =A05 13:19:20 kernel: [680493.141219] =C2=A0schedule_timeout+0x16c/0x340Jan =C2=A05 13:19:20 kernel: [680493.141221] =C2=A0? call_timer_fn+0x130/0= x130
Jan =C2=A05 13:19:20 kernel: [680493.141222] =C2=A0rcu_gp_kthread+0= x486/0xd60
Jan =C2=A05 13:19:20 kernel: [680493.141224] =C2=A0kthread+0x= fd/0x130
Jan =C2=A05 13:19:20 kernel: [680493.141226] =C2=A0? force_qs_r= np+0x170/0x170
Jan =C2=A05 13:19:20 kernel: [680493.141227] =C2=A0? __kt= hread_parkme+0x90/0x90
Jan =C2=A05 13:19:20 kernel: [680493.141228] =C2= =A0ret_from_fork+0x35/0x40

Xen-dom0 is running kernel 4.14.158 and t= hese xen command line options: GRUB_CMDLINE_XEN=3D"dom0_mem=3D4G gntta= b_max_frames=3D256 ucode=3Dscan loglvl=3Dall guest_loglvl=3Dall console_to_= ring console_timestamps=3Ddate conring_size=3D1m smt=3Dtrue iommu=3Dno-intr= emap"

Xen-domU config:
name =3D "machine"
kerne= l =3D "kernel-4.14.159-gentoo-xen"
memory =3D 10000
vcpus = =3D 16
vif =3D [ '' ]
disk =3D [
'...root,raw,xvda,rw&= #39;,
'...opt,raw,xvdc,rw',
'...home,raw,xvdb,rw','...tmp,raw,xvdd,rw',
'...var,raw,xvde,rw',
]
ext= ra =3D "root=3D/dev/xvda net.ifnames=3D0 console=3DttyS0 console=3Dtty= S0,38400n8"
type =3D "hvm"
sdl =3D 0
vnc =3D 0
s= erial=3D'pty'
xen_platform_pci=3D1
max_grant_frames =3D 256
I've had issues like this in the past with the grant frames (basi= cally this issue https://bugs.debian.org/cgi-bin/bugreport.cg= i?bug=3D880554), maybe some other value needs to be raised too?

= Thanks,
Tomas

Reproduced on an= other HP machine. The previous one was HP ProLiant DL360 G7 with 2x Intel X= eon E5620 @ 2.40GHz. The other is HP ProLiant DL360p Gen8 with 2x Intel Xeo= n CPU E5-2630 @ 2.30GHz.

The strange thing is= this does not happen on our testing machine (but has lower load of course)= - that's a Supermicro X10DRW with 1x Intel Xeon CPU E5-2620 v3 @ 2.40G= Hz.


Just a= n update, I've tried Xen 4.12 and the latest staging Xen 4.13, both beh= ave the same. Doesn't matter if kernel 4.14 or 5.4 is used. Right after= the Xen version is reverted back to 4.11, everything works just fine, noth= ing else needs to be changed.

I've tried adding "mitigation= s=3Doff" to kernel options and "spec-ctrl=3Dfalse xpti=3Dfalse pv= -l1tf=3Dfalse tsx=3Dtrue" to Xen options, but it didn't help eithe= r.

Thanks,
Tomas


As reported in https://lists.xenproject.org/ar= chives/html/xen-devel/2020-01/msg00361.html and https://lis= ts.xenproject.org/archives/html/xen-users/2020-02/msg00042.html, switch= ing back to credit1 scheduler seems to make it working again. I've migr= ated 6 machines to Xen 4.12 with sched=3Dcredit xen option and haven't = observed a hang for more than a week now.

Thanks,
Tomas

--0000000000004a8ed3059f4d14c3-- --===============0749785586660830051== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLXVzZXJz IG1haWxpbmcgbGlzdApYZW4tdXNlcnNAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0 cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi11c2Vycw== --===============0749785586660830051==-- From xen-users-bounces@lists.xenproject.org Mon Feb 24 15:56:59 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 24 Feb 2020 15:56:59 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j6G5E-0008Ri-0h; Mon, 24 Feb 2020 15:55:48 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j6G5C-0008RW-Id for xen-users@lists.xenproject.org; Mon, 24 Feb 2020 15:55:46 +0000 X-Inumbo-ID: 1e34a916-571e-11ea-a490-bc764e2007e4 Received: from mail-qt1-x830.google.com (unknown [2607:f8b0:4864:20::830]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 1e34a916-571e-11ea-a490-bc764e2007e4; 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Mon, 24 Feb 2020 07:55:45 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Glen Date: Mon, 24 Feb 2020 07:55:33 -0800 Message-ID: To: Tomas Mozes , xen-users@lists.xenproject.org, xen-devel@lists.xenproject.org Subject: Re: [Xen-users] xen domU stall on 4.12.1 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" T24gU3VuLCBGZWIgMjMsIDIwMjAgYXQgMTE6MTIgUE0gVG9tYXMgTW96ZXMgPGh5ZHJhcG9saWNA Z21haWwuY29tPiB3cm90ZToKPiBBcyByZXBvcnRlZCBpbiBodHRwczovL2xpc3RzLnhlbnByb2pl Y3Qub3JnL2FyY2hpdmVzL2h0bWwveGVuLWRldmVsLzIwMjAtMDEvbXNnMDAzNjEuaHRtbCBhbmQg aHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9hcmNoaXZlcy9odG1sL3hlbi11c2Vycy8yMDIw LTAyL21zZzAwMDQyLmh0bWwsIHN3aXRjaGluZyBiYWNrIHRvIGNyZWRpdDEgc2NoZWR1bGVyIHNl ZW1zIHRvIG1ha2UgaXQgd29ya2luZyBhZ2Fpbi4gSSd2ZSBtaWdyYXRlZCA2IG1hY2hpbmVzIHRv IFhlbiA0LjEyIHdpdGggc2NoZWQ9Y3JlZGl0IHhlbiBvcHRpb24gYW5kIGhhdmVuJ3Qgb2JzZXJ2 ZWQgYSBoYW5nIGZvciBtb3JlIHRoYW4gYSB3ZWVrIG5vdy4KCk15IGV4cGVyaWVuY2UgaXMgdGhl IHNhbWUuICBJIGhhdmUgbWlncmF0ZWQgYWxsIDE2IG9mIG15IHBoeXNpY2FsCmhvc3RzIGJhY2sg dG8gT3BlblN1c2UgMTUuMSB3aXRoIFhlbiA0LjEyLjEgd2l0aCBzY2hlZD1jcmVkaXQgLiAgQWxs Cmd1ZXN0cyBhcmUgbm93IHJ1bm5pbmcgcGVyZmVjdGx5LCB3aXRob3V0IGFueSBpc3N1ZXMgYXQg YWxsLiAgT3Zlcgp0aGlzIHBhc3Qgd2VlayBJIHBlcmZvcm1lZCBkaXJlY3RlZCBzdHJlc3MtdGVz dGluZyBhZ2FpbnN0IHNldmVyYWwgb2YKbXkgZ3Vlc3RzLCBhbmQgdGhleSBhbGwgc3Vydml2ZWQg d2l0aG91dCBhbnkgcHJvYmxlbXMgYXQgYWxsLiAgSSd2ZQpub3cgY29tcGxldGVseSBteSBtaWdy YXRpb24gdG8gdGhlIG5ldyBndWVzdHMsIGFuZCBldmVyeW9uZSBpcyBoYXBweS4KCkknbSBub3cg Z29pbmcgdG8gYnJpbmcgb25lIG9mIHRoZSBwcmV2aW91c2x5LWxpdmUgZ3Vlc3RzIG9uIGl0cyBv d24KaG9zdCBiYWNrIHRvIGNyZWRpdDIgc28gSSBjYW4gY3Jhc2ggaXQgYW5kIHRyeSB0byBjYXB0 dXJlIGRlYnVnZ2luZwpvdXRwdXQgZm9yIHhlbi1kZXZlbCBhcyByZXF1ZXN0ZWQuICBCdXQgc2No ZWQ9Y3JlZGl0IGlzIGRlZmluaXRlbHkKd2hhdCB3ZSBuZWVkZWQgdG8gc29sdmUgdGhpcyBwcm9i bGVtISAgVGhhbmsgeW91IGFsbCBmb3IgaGVscGluZyB1cwpnZXQgdGhlcmUhCgpHbGVuCgpfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tdXNlcnMgbWFp bGluZyBsaXN0Clhlbi11c2Vyc0BsaXN0cy54ZW5wcm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhl bnByb2plY3Qub3JnL21haWxtYW4vbGlzdGluZm8veGVuLXVzZXJz From xen-users-bounces@lists.xenproject.org Mon Feb 24 17:04:48 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 24 Feb 2020 17:04:48 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j6H8s-0007wr-Jy; 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boundary="===============4887942108772207891==" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" --===============4887942108772207891== Content-Type: multipart/alternative; boundary="000000000000c2efc5059f55599c" --000000000000c2efc5059f55599c Content-Type: text/plain; charset="UTF-8" On Mon, Feb 24, 2020 at 4:55 PM Glen wrote: > On Sun, Feb 23, 2020 at 11:12 PM Tomas Mozes wrote: > > As reported in > https://lists.xenproject.org/archives/html/xen-devel/2020-01/msg00361.html > and > https://lists.xenproject.org/archives/html/xen-users/2020-02/msg00042.html, > switching back to credit1 scheduler seems to make it working again. I've > migrated 6 machines to Xen 4.12 with sched=credit xen option and haven't > observed a hang for more than a week now. > > My experience is the same. I have migrated all 16 of my physical > hosts back to OpenSuse 15.1 with Xen 4.12.1 with sched=credit . All > guests are now running perfectly, without any issues at all. Over > this past week I performed directed stress-testing against several of > my guests, and they all survived without any problems at all. I've > now completely my migration to the new guests, and everyone is happy. > > I'm now going to bring one of the previously-live guests on its own > host back to credit2 so I can crash it and try to capture debugging > output for xen-devel as requested. But sched=credit is definitely > what we needed to solve this problem! Thank you all for helping us > get there! > > Glen > Thank you too for your report. Hope we'll find the reason why credit2 misbehaves. Tomas --000000000000c2efc5059f55599c Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Mon, Feb 24, 2020 at 4:55 PM Glen = <glenbarney@gmail.com> wr= ote:
On Sun, Feb= 23, 2020 at 11:12 PM Tomas Mozes <hydrapolic@gmail.com> wrote:
> As reported in https:= //lists.xenproject.org/archives/html/xen-devel/2020-01/msg00361.html an= d https://lists.xenproject= .org/archives/html/xen-users/2020-02/msg00042.html, switching back to c= redit1 scheduler seems to make it working again. I've migrated 6 machin= es to Xen 4.12 with sched=3Dcredit xen option and haven't observed a ha= ng for more than a week now.

My experience is the same.=C2=A0 I have migrated all 16 of my physical
hosts back to OpenSuse 15.1 with Xen 4.12.1 with sched=3Dcredit .=C2=A0 All=
guests are now running perfectly, without any issues at all.=C2=A0 Over
this past week I performed directed stress-testing against several of
my guests, and they all survived without any problems at all.=C2=A0 I'v= e
now completely my migration to the new guests, and everyone is happy.

I'm now going to bring one of the previously-live guests on its own
host back to credit2 so I can crash it and try to capture debugging
output for xen-devel as requested.=C2=A0 But sched=3Dcredit is definitely what we needed to solve this problem!=C2=A0 Thank you all for helping us get there!

Glen

Thank you too for your report. Hop= e we'll find the reason why credit2 misbehaves.

Tomas
--000000000000c2efc5059f55599c-- --===============4887942108772207891== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLXVzZXJz IG1haWxpbmcgbGlzdApYZW4tdXNlcnNAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0 cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi11c2Vycw== --===============4887942108772207891==-- From xen-users-bounces@lists.xenproject.org Thu Feb 27 02:49:51 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Thu, 27 Feb 2020 02:49:51 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j79Do-0005Wg-Qo; Thu, 27 Feb 2020 02:48:20 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j79Dn-0005Wb-13 for xen-users@lists.xen.org; Thu, 27 Feb 2020 02:48:19 +0000 X-Inumbo-ID: 9b999184-590b-11ea-8fc3-bc764e2007e4 Received: from smtp5.emailarray.com (unknown [65.39.216.39]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 9b999184-590b-11ea-8fc3-bc764e2007e4; Thu, 27 Feb 2020 02:48:18 +0000 (UTC) Received: (qmail 93001 invoked by uid 89); 27 Feb 2020 02:48:16 -0000 Received: from unknown (HELO ?192.168.0.99?) (Y2hhcmxlc0BjaGFybGVzbWF0a2luc29uLm9yZ0AxODIuNzEuMjI2LjEw) (POLARISLOCAL) by smtp5.emailarray.com with SMTP; 27 Feb 2020 02:48:16 -0000 To: xen-users@lists.xen.org From: Charles Message-ID: <753262ad-c72e-2591-ff27-03b88f7f9fef@charlesmatkinson.org> Date: Thu, 27 Feb 2020 08:22:23 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 Content-Language: en-GB Subject: [Xen-users] How to monitor memory in a Linux Xen DomU with a balloon driver? 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[54.240.197.230]) by smtp.gmail.com with ESMTPSA id v25sm61272edx.89.2020.02.28.02.16.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 28 Feb 2020 02:16:30 -0800 (PST) To: Dirk Streubel , xen-users@lists.xenproject.org References: <4635b684-e238-9666-c67b-290130818934@posteo.de> From: Julien Grall Message-ID: Date: Fri, 28 Feb 2020 10:16:29 +0000 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <4635b684-e238-9666-c67b-290130818934@posteo.de> Content-Language: en-GB Subject: Re: [Xen-users] Start Domain X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" CgpPbiAyOC8wMi8yMDIwIDA5OjQ2LCBEaXJrIFN0cmV1YmVsIHdyb3RlOgo+IEhlbGxvIExpc3Qs CgpIZWxsbywKCj4gCj4gbWF5YmUgYSBxdWVzdGlvbiB0aGF0IHdvdWxkIGFza2VkIDEwMDAgVGlt ZXMsIGJ1dCBpIGNhbid0IGZpbmQgYW4gYW5zd2VyIHRvIG15IHF1ZXN0aW9uIHdpdGggdGhlCj4g aGVscCBvZiBHb29nbGUgOykKPiAKPiBJIGFtIHVzaW5nIEZlZG9yYSBSYXdoaWRlIGFuZCBYZW4g VmVyc2lvbiA0LjEzIGFuZCBpIHdvdWxkIGxpa2UgdG8gc3RhcnQgYSB2bSBpbiB0aGUgdGVybWlu YWwuCj4gCj4gSSBnbyB0byAvZXRjL2xpYnZpcnQvbGlieGzCoCBhbmQgbWFrZSB0aGlzOgo+IAo+ IAo+IFtyb290QHNjaHVsdW5nIGxpYnhsXSMgcHdkCj4gL2V0Yy9saWJ2aXJ0L2xpYnhsCj4gW3Jv b3RAc2NodWx1bmcgbGlieGxdIyB4bCBjcmVhdGUgLW4gY2VudG9zOC4wLnhtbAo+IFBhcnNpbmcg Y29uZmlnIGZyb20gY2VudG9zOC4wLnhtbAo+IGNlbnRvczguMC54bWw6MTogY29uZmlnIHBhcnNp bmcgZXJyb3IgbmVhciBgPCEtLSc6IGxleGljYWwgZXJyb3IKPiBjZW50b3M4LjAueG1sOjI6IGNv bmZpZyBwYXJzaW5nIGVycm9yIG5lYXIgYFdBUk5JTkc6JzogbGV4aWNhbCBlcnJvcgo+IGNlbnRv czguMC54bWw6MzogY29uZmlnIHBhcnNpbmcgZXJyb3IgbmVhciBgT1ZFUldSSVRURU4nOiBsZXhp Y2FsIGVycm9yCj4gY2VudG9zOC4wLnhtbDozOiBjb25maWcgcGFyc2luZyBlcnJvciBuZWFyIGA6 JzogbGV4aWNhbCBlcnJvcgo+IGNlbnRvczguMC54bWw6NTogY29uZmlnIHBhcnNpbmcgZXJyb3Ig bmVhciBgQVBJLic6IGxleGljYWwgZXJyb3IKPiBjZW50b3M4LjAueG1sOjY6IGNvbmZpZyBwYXJz aW5nIGVycm9yIG5lYXIgYC0tPic6IGxleGljYWwgZXJyb3IKPiBjZW50b3M4LjAueG1sOjg6IGNv bmZpZyBwYXJzaW5nIGVycm9yIG5lYXIgYDxkb21haW4nOiBsZXhpY2FsIGVycm9yCj4gY2VudG9z OC4wLnhtbDo4OiBjb25maWcgcGFyc2luZyBlcnJvciBuZWFyIGA+JzogbGV4aWNhbCBlcnJvcgo+ IGNlbnRvczguMC54bWw6MTA6IGNvbmZpZyBwYXJzaW5nIGVycm9yIG5lYXIgYDx1dWlkPjRmMzdk YzhmLWNlZWQtNDVjZC1hMDYxLTZkNWNhMGY2MmIzMzwvdXVpZD4nOgo+IGxleGljYWwgZXJyb3IK PiBjZW50b3M4LjAueG1sOjExOiBjb25maWcgcGFyc2luZyBlcnJvciBuZWFyIGA8bWVtb3J5Jzog bGV4aWNhbCBlcnJvcgo+IGNlbnRvczguMC54bWw6MTI6IGNvbmZpZyBwYXJzaW5nIGVycm9yIG5l YXIgYDxjdXJyZW50TWVtb3J5JzogbGV4aWNhbCBlcnJvcgo+IGNlbnRvczguMC54bWw6MTM6IGNv bmZpZyBwYXJzaW5nIGVycm9yIG5lYXIgYDx2Y3B1JzogbGV4aWNhbCBlcnJvcgo+IGNlbnRvczgu MC54bWw6MTQ6IGNvbmZpZyBwYXJzaW5nIGVycm9yIG5lYXIgYDxvcz4nOiBsZXhpY2FsIGVycm9y Cj4gY2VudG9zOC4wLnhtbDoxNTogY29uZmlnIHBhcnNpbmcgZXJyb3IgbmVhciBgPHR5cGUnOiBs ZXhpY2FsIGVycm9yCj4gd2FybmluZzogQ29uZmlnIGZpbGUgbG9va3MgbGlrZSBpdCBjb250YWlu cyBQeXRob24gY29kZS4KPiB3YXJuaW5nOsKgIEFyYml0cmFyeSBQeXRob24gaXMgbm8gbG9uZ2Vy IHN1cHBvcnRlZC4KPiB3YXJuaW5nOsKgIFNlZSBodHRwOi8vd2lraS54ZW4ub3JnL3dpa2kvUHl0 aG9uSW5YbENvbmZpZwo+IEZhaWxlZCB0byBwYXJzZSBjb25maWc6IEludmFsaWQgYXJndW1lbnQK PiBbcm9vdEBzY2h1bHVuZyBsaWJ4bF0jCj4gCj4gCj4gU28sIHdpdGggdmlydC1tYW5hZ2VyIHRo aXMgbm8gUHJvYmxlbSB0byBzdGFydCBhIFZNLCBYbCBzaHV0ZG93biB3b3JrcyBmb3IgbWUuCj4g Cj4gU28sIHdlcmUgaXMgbXkgZmF1bHQ/IFVzZSBpIHRoZSB3cm9uZyBjb21tYW5kIHRvIHN0YXJ0 IGEgdm0/CgpUaGUgY29uZmlndXJhdGlvbiBmaWxlIGZvciBsaWJ2aXJ0IGFuZCB4bCBpcyBkaWZm ZXJlbnQuIFlvdSB3aWxsIHdhbnQgdG8gCmNvbnZlcnQgdGhlIGZpbGUgaWYgeW91IHdhbnQgdG8g dXNlIHhsLgoKWW91IGNhbiByZWFkIFsxXSBmb3IgbW9yZSBkZXRhaWxzIG9uIHhsIGNvbmZpZ3Vy YXRpb24gZmlsZS4KCkNoZWVycywKClsxXSBodHRwczovL3hlbmJpdHMueGVuLm9yZy9kb2NzL3Vu c3RhYmxlL21hbi94bC5jZmcuNS5odG1sCgotLSAKSnVsaWVuIEdyYWxsCgpfX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tdXNlcnMgbWFpbGluZyBsaXN0 Clhlbi11c2Vyc0BsaXN0cy54ZW5wcm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qu b3JnL21haWxtYW4vbGlzdGluZm8veGVuLXVzZXJz From xen-users-bounces@lists.xenproject.org Fri Feb 28 10:22:36 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Fri, 28 Feb 2020 10:22:36 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1j7cmZ-0005b6-F8; 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