From xen-users-bounces@lists.xenproject.org Tue Sep 01 05:19:46 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Tue, 01 Sep 2020 05:19:46 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kCygN-0000Yu-SY; Tue, 01 Sep 2020 05:18:11 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kCygM-0000Yn-Vm for xen-users@lists.xenproject.org; Tue, 01 Sep 2020 05:18:11 +0000 X-Inumbo-ID: dca877bb-7b04-4b49-9e2f-ca8860a78172 Received: from mail-qk1-x733.google.com (unknown [2607:f8b0:4864:20::733]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id dca877bb-7b04-4b49-9e2f-ca8860a78172; Tue, 01 Sep 2020 05:18:10 +0000 (UTC) Received: by mail-qk1-x733.google.com with SMTP id u3so8394309qkd.9 for ; Mon, 31 Aug 2020 22:18:10 -0700 (PDT) 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 :cc; bh=Ufgv5HfxzY0ofrQcyFc9Rudv0EmgtaEl/5JJt9Mvlfk=; b=C0MIwDD9If8eQD1h6oIIH7pjPjh/jb43LekBjV6eVJR0e9MDmJOF1RI/5B80n6L5Hy HGTrRuaAjMCq6MLgJU/ZZ6J5QZgB4x2gUXermr8bKFhQSl+z0XgQnr1HE6AiyE+BTO6Q 9Yhn+QIRxpEmhDyyQDk/WYwukb2iXa3E75J7nW4A2V4JX1OFjNg3VoyDgw3cV2FABca6 0Jm8Rhx4cY0rvsnFPYK9AEzi94S/q/dgwNTXKB8gqfYRAqKZ8e6iTBBSWX6nlO+8emqZ n7WYhZTOZCmClYurVMDevl8BASh1kvqfx0y0F73r01XWQUTO2GfSlaqHZMmf6IVd1jPY xRog== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Ufgv5HfxzY0ofrQcyFc9Rudv0EmgtaEl/5JJt9Mvlfk=; b=O+l0pnBAQQ5BkJH55YrDJB/Cl9QW4nwhnS4pZbASH1BO9kXxXiTfKzFt7vhO0EBcTa mTXhohxIqqpS7M/v8Jb2iqMaUrzazdzJe/xghX5iAsBFiw+kwfM7pQTFyXBSwJNmVlsB TZXk0c/8mArNomo2JCDaSaUJ6JdFXBGJkxrbUudEuFeV2/FtSL0poT6FL36XaZLmthXR vMufUPzhRsM0YBxy3beOlmn380vFyM62X3uc7xN08HXAr0Ta2IGmJXiwaIEH/vKqAL3o R/S+uFrkFOs+Zy1LO/+O0KtTCvw9gyfgW+/KfTwnRLs0EgR8S1rkI+WHfJiDslD1mVzu ZnxA== X-Gm-Message-State: AOAM53284+ze2w767M0QHjOGLPoRwrRWRDCrvrPfPzw6uUu37ohKv0Z0 4Ks172ekdjD+W0LTMQ+bbuWeED504ER2bHue1xo= X-Google-Smtp-Source: ABdhPJzqneteUICOtRd0RrKa58H+od5sWQOIXoDToCWv3s2uHyt7eMjcrJOhwVMwheZCgOYWitB39sPzWCFnOm5Cqzw= X-Received: by 2002:a37:909:: with SMTP id 9mr177304qkj.317.1598937489881; Mon, 31 Aug 2020 22:18:09 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: AshishKumar Mishra Date: Tue, 1 Sep 2020 10:47:58 +0530 Message-ID: Subject: Re: Watchdog triggered while trying to access shared page To: Stefano Stabellini Cc: xen-users@lists.xenproject.org Content-Type: multipart/alternative; boundary="0000000000001a3c3305ae39a5e9" X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --0000000000001a3c3305ae39a5e9 Content-Type: text/plain; charset="UTF-8" Thanks Stefano for pointer's . Will try them - Ashish. --0000000000001a3c3305ae39a5e9 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Thanks Stefano for pointer's .
Will try them=C2=A0

- Ashish.
--0000000000001a3c3305ae39a5e9-- From xen-users-bounces@lists.xenproject.org Tue Sep 01 14:18:26 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Tue, 01 Sep 2020 14:18:26 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kD75X-0000zI-OP; Tue, 01 Sep 2020 14:16:43 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kD75V-0000zD-Tw for xen-users@lists.xenproject.org; Tue, 01 Sep 2020 14:16:41 +0000 X-Inumbo-ID: 5119651a-7761-4723-a311-9b76c1262a08 Received: from mx0.itk-engineering.de (unknown [212.121.145.30]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 5119651a-7761-4723-a311-9b76c1262a08; Tue, 01 Sep 2020 14:16:39 +0000 (UTC) From: Daniel Wagner2 To: Julien Grall , "xen-users@lists.xenproject.org" , Peng Fan Subject: AW: Colibri imx8qxp: Missing kernel boot module Thread-Topic: Colibri imx8qxp: Missing kernel boot module Thread-Index: AdZ4e7LIFVj5XH/jSxu7Yy990/VQuwCczMCAAV0JuGA= Date: Tue, 1 Sep 2020 14:16:37 +0000 Message-ID: <13be110452c945c792d79c370c8fa5a7@itk-engineering.de> References: <371b26ab9d3d40528235d89d2bcbf42d@itk-engineering.de> <3e115eb4-d9a4-7123-651c-b6d040edaf14@xen.org> In-Reply-To: <3e115eb4-d9a4-7123-651c-b6d040edaf14@xen.org> Accept-Language: de-DE, en-US Content-Language: de-DE X-MS-Has-Attach: yes X-MS-TNEF-Correlator: Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=2.16.840.1.101.3.4.2.3; boundary="----=_NextPart_000_0031_01D6807B.43B3ADF0" MIME-Version: 1.0 x-msw-jemd-newsletter: false X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" ------=_NextPart_000_0031_01D6807B.43B3ADF0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hello, > On 22/08/2020 13:00, Daniel Wagner2 wrote: > >>>>>>>> On 10/08/2020 16:32, Daniel Wagner2 wrote: > >>>>>>>>> Hello xen-users, > >>>>>>>>> we are trying to get Xen running on a Toradex "Colibri iMX8X" > >>>>>>>>> module (see [1] at the bottom of this email), which features > >>>>>>>>> the > >>>>>>>>> iMX8 QXP > >>>>>>> prozessor. > >>>>>>>>> We found that NXP has a Xen reference implementation [2][3] > >>>>>>>>> for their MEK Module and tried to port that to the Toradex > >>> module. > >>>>>>>>> > >>>>>>>>> When booting via the bootscript [4], which is unaltered except > >>>>>>>>> for the "dom0fdt_file" and "xenhyper_bootargs" variables, we > >>>>>>>>> get the following > >>>>>>>>> error: > >>>>>>>>> > >>>>>>>>> [...] (See [5] for complete bootlog) > >>>>>>>>> (XEN) *** LOADING DOMAIN 0 *** > >>>>>>>>> (XEN) Missing kernel boot module? > >>>>>>>>> (XEN) > >>>>>>>>> (XEN) **************************************** > >>>>>>>>> (XEN) Panic on CPU 0: > >>>>>>>>> (XEN) Could not set up DOM0 guest OS > >>>>>>>>> (XEN) **************************************** > >>>>>>>>> (XEN) > >>>>>>>>> (XEN) Reboot in five seconds... > >>>>>>>>> > >>>>>>>>> For Dom0 we took the linux-toradex kernel source, ran "make > >>>>> xenconfig" > >>>>>>>>> [6], which should add Xen-support and rebuilt the Image with > >>>>>>>>> "make > >>>>>>> Image". > >>>>>>>>> For dom0 DTB [7] we copied the dom0 DTS NXP uses for their > >>>>>>> MEK-Module > >>>>>>>>> [8] and only adjusted the "bootargs" parameter. > >>>>>>>>> This Linux Image was able to run after we rebuilt and booted > >>>>>>>>> it without > >>>>>>> Xen. > >>>>>>>> > >>>>>>>> Which Device-Tree did you for boot Linux without Xen? > >>>>>>> > >>>>>>> Used the same Device-Tree Binary that we want to use with Xen > >>>>>>> which is described in [7]. In [7] you can see rows 23 and 24, > >>>>>>> which include the Devicetree as it is supplied by Toradex. > >>>>>>> To boot linux with our dom0 DTB, the u-boot variable fdt_file > >>>>>>> was changed from fsl-imx8qxp-colibri-eval-v3.dtb to > >>>>>>> fsl-imx8qxp-colibri-eval-v3-dom0.dtb. > >>>>>> > >>>>>> > >>>>>> Did you use the U-Boot cmd 'xenmmcboot' or 'xennetboot'? > >>>>> > >>>>> To boot linux without Xen the u-boot cmd 'boot' is used. > >>>>> To boot Xen we use 'run xenmmcboot' (in an adjusted form to > >>>>> account for different filenames and bootargs, see [4]). > >>>> > >>>> So kernel Image loaded to 0x80a00000, right? > >>>> > >>>> Please load kernel image before run xenmmcboot if not. > >>> > >>> The xenmmcboot script [4] line 25 loads the linux image. > >>> Inserting the values for the variables in this line gives: > >>> 'fatload mmc 0:1 0x92000000 image' > >>> So we load the kernel image to 0x92000000. Is this not the right adress? > >>> How can the right adress, to load the kernel image to, be determined? > >> > >> With U-boot, you will have to unfortunately determine the address > > manually. I > >> usually use the address provided by U-boot for baremetal boot and > >> load > > both > >> Xen and Linux close to each other. > >> > >>> Loading it to 0x80a00000 yields the same error ("Missing kernel boot > >>> module?") > >> > >> It may be possible that the Device-Tree node is incorrect. Would it > >> be > > possible to > >> dump the Device-Tree node /chosen/ in either U-boot or Xen? > >> > > > > We tried to load xen, dom0 und fdt close together in an effort to > > replicate your approach. > > Thats why we now load > > xen @ 0x8200 0000 > > dom0 @ 0x8210 0000 > > fdt @ 0x8370 0000 > > To account for these changes, the /chosen node was also adjusted. > > /chosen (for readibility as pastebin): > > https://pastebin.com/v6pmm1iq > > > > chosen { > > bootargs = "console=ttyLP3,115200 > > earlycon=lpuart32,0x5a090000,115200"; > > stdout-path = "/serial@5a090000"; > > #address-cells = <0x00000002>; > > #size-cells = <0x00000002>; > > module@0 { > > bootargs = "earlycon=xen console=hvc0 loglevel=8 > > root=/dev/mmcblk0p2 rootwait rw"; > > xen,dom0-bootargs = "console=dtuart dtuart=ttyLP3 > > earlycon=lpuart3,0x5a090000,115200"; > > compatible = "xen,linux-zimage", "xen,multiboot-module"; > > reg = <0x00000000 0x82100000 0x00000000 0x01490a00>; > > }; > > }; > > Thank you for the input. At first glance, I don't see the issue with the node > but it looks like Xen is not happy with it. > > I am not entirely sure why yet. Do you mind to enable earlyprintk for your > platform? With that you should be able to get more information about the > list of modules discovered. I didn't manage to enable earlyprintk. But I enabled kconfig "Developer Checks": "Verbose debug messages" and "Devicetree debug messages" and put some extra printks in the Xen Source and was able to locate the problem. When parsing the fdt, the memory@80000000 node throws an error, which stops the parsing before the /chosen node was found and so no kernel boot module was found for dom0. I bypassed this by putting the /chosen node at the top of the fdt, so that module@0 gets parsed before the functions arrives at the memory node. After this change, Dom0 was successfully booted by Xen. I have created a pastebin https://pastebin.com/JBjKNvPP for future reference. At pastebin line 215 Xen already found the kernel boot module. So I put "boot_fdt_info(device_tree_flattened, fdt_paddr);" in start_xen (arch/arm/setup.c) after the "console_init_postirq();" call, so tha the function is run a second time, but this time the outputs are shown in the bootlog (starting pastebin l. 247). Starting at pastebin line 337, parser arrives at memory node. Line 349 is what is specified in the fdt (which I copy here for reference) memory@80000000 { device_type = "memory"; reg = <0x00000000 0x80000000 0 0x40000000>; }; The first bank found (l. 349) is the one from the fdt node. I am not sure where the second bank (l. 350) comes from. The the second bank's size=0 ist what causes the parse to fail and will Xen prevent from finding the boot kernel for dom0 if the /chosen node comes after the memory node in the fdt. Thanks for the help wih this issue Julien and Peng! 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Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id C0D20AD04; Wed, 2 Sep 2020 10:45:45 +0000 (UTC) Subject: Re: repeated Kernel oops need help to debug To: moftah moftah Cc: xen-users@lists.xenproject.org References: <58c623cc-886d-ed54-18e5-356309691ea5@suse.com> <9925fe26-9b0a-bd04-2d6e-bffd5b5d9769@suse.com> From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Message-ID: <4e659050-aa01-e4f2-f653-8dd6a3396244@suse.com> Date: Wed, 2 Sep 2020 12:45:44 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" On 24.08.20 20:31, moftah moftah wrote: > Hi Jurgon, > > I think the commit 021a17ed796b is mostly causing the issue as you explained > I tried to port back the fixes in 5.4 and 5.5 back to 4.19 but that was > out of my level (the code changed between those versions and I no longer > clearly see where to apply the fixes) > > So the other workaround i did is that i reverted 021a17ed796b in 4.19 > and comibled new kernel > the new kernel is much more stable although the issue still occur but i > would say the frequency of the occurring is 10% of  what it was before > reverting 021a17ed796b > > maybe if someone can port the fixed in 5.4 and 5.5 back to 4.19 it will > fix the issue 100% (I still have the oops but the frequency is less than > before) You should ask the authors of the two fixup patches to backport them. Juergen From xen-users-bounces@lists.xenproject.org Fri Sep 04 07:51:47 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Fri, 04 Sep 2020 07:51:47 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kE6Tq-0008O5-2N; Fri, 04 Sep 2020 07:49:54 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kE6To-0008O0-BQ for xen-users@lists.xenproject.org; Fri, 04 Sep 2020 07:49:52 +0000 X-Inumbo-ID: d59a407b-7b0c-4208-9a12-217da3b168c1 Received: from mail-qv1-xf31.google.com (unknown [2607:f8b0:4864:20::f31]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id d59a407b-7b0c-4208-9a12-217da3b168c1; Fri, 04 Sep 2020 07:49:51 +0000 (UTC) Received: by mail-qv1-xf31.google.com with SMTP id m14so2624216qvt.1 for ; Fri, 04 Sep 2020 00:49:51 -0700 (PDT) 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=PZaRAjt4E/cvYmOO7gudQ1H2pUxhuX7aV7qUAs98D7s=; b=E/8auQKYbEml2BsOeSjX4H8wD960aCOR6wsG0o+93SRJTxq+Bw3gl/Td7YyhZqAS5C tsxZSuGuLtrsaXGUUIUjn8MKuq4RN0KlsA9tyQfaT0+EVsevKiC2o06VmOD1YponI2EW qzriwGG2UMj0WAQqMTo4MKRLHzpzAmA3yI6Qo7nrFOwV1SoUUOy+c1fmnQGfwLyGT24L gkqLQZ8zea4mazXYOM7ZWITMpJoZoZdtQSg2LedjsC5bA7s8E2r/CjLSte27uoricxxA jD+FI8da6cqjgSlzUVA3osIKbGcq6LWwmWI9rDOyKoruLJ/XgFFP1GsrvXyzjucO8fwR 5wpg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=PZaRAjt4E/cvYmOO7gudQ1H2pUxhuX7aV7qUAs98D7s=; b=m75C5iV3zWCm40VhUdxpWjEuw91S1vJRoaRwIGb3Wl0wSszzWUY/ybS7RlrVsH+f9i w2RGD6XBMaTmJf8JvmccuQoSZKrwlsSLCDznBy3kjGICwO7ryE5/StLtRKDuSZ0t1tcx rSqMeLzCJenNe8mFg/UgyGw9epUiuZM/XzmTysUkJGCz42HcRdyo6MiBNlsO5jzl6oam VMO5f4VOI/nrp9EuEC4eaBGMkXozOcFE0CU6696nlIU0z1QrTdLFiwcECK555Hxod5Q+ oqlicl0A+imRUe12YN/kTYz4C8nTj5FFEMJnScp21QhEvRMwu17XxBM1Po+b8d6saqj2 59Ew== X-Gm-Message-State: AOAM532elOfUzVV0GZdfbcbXNtDw0vqo5aNCexI5bgJprHqOBXSb1y6Y xKfLMWjlzsrxhZWL/4joubTug+IZulOQZCdXgAP9NbDp+ddm/Q== X-Google-Smtp-Source: ABdhPJx63IQbggIZ20FvGoNWXtU9tA9KKY8SQsEv9BzZoFwal0/UN4jTYpVI8bvnAgusMTX1+k3I0TQyxHqjCnsgRLQ= X-Received: by 2002:ad4:5768:: with SMTP id r8mr5632912qvx.12.1599205790485; Fri, 04 Sep 2020 00:49:50 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Tomas Mozes Date: Fri, 4 Sep 2020 09:49:47 +0200 Message-ID: Subject: Re: xen domU lost networking after upgrading to stable-4.13 To: xen-users@lists.xenproject.org Content-Type: multipart/alternative; boundary="000000000000108f6e05ae781d8e" X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --000000000000108f6e05ae781d8e Content-Type: text/plain; charset="UTF-8" On Wed, Aug 5, 2020 at 9:57 AM Tomas Mozes wrote: > Hello, > I was trying to upgrade one of my Xen dom0 from stable-4.12 to > stable-4.13. The machine has been rock stable on 4.12, but after the > upgrade and reboot, one of the xen-domU (there are 15 virtual machines on > the host) lost it's networking with this in the kernel log: > > [ 1226.477594] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: > [ 1226.477607] rcu: 0-....: (8 GPs behind) idle=b82/0/0x1 > softirq=55602/55602 fqs=5250 > [ 1226.477613] (detected by 8, t=21002 jiffies, g=151513, q=854) > [ 1226.477619] Sending NMI from CPU 8 to CPUs 0: > [ 1226.478642] NMI backtrace for cpu 0 > [ 1226.478646] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.55-gentoo #1 > [ 1226.478648] Hardware name: Xen HVM domU, BIOS 4.13.1 08/03/2020 > [ 1226.478650] RIP: 0010:io_serial_out+0x11/0x20 > [ 1226.478654] Code: 8b 57 08 d3 e6 01 f2 ec 0f b6 c0 c3 66 66 2e 0f 1f 84 > 00 00 00 00 00 66 90 0f b6 8f b9 00 00 00 89 d0 8b 57 08 d3 e6 01 f2 ee > 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 0f b6 87 ba 00 00 00 > [ 1226.478656] RSP: 0018:ffffc90000003e20 EFLAGS: 00000002 > [ 1226.478659] RAX: 0000000000000074 RBX: ffff888271e1c000 RCX: > 0000000000000000 > [ 1226.478661] RDX: 00000000000003f8 RSI: 0000000000000000 RDI: > ffffffff832fcc00 > [ 1226.478663] RBP: ffffffff832fcc00 R08: 00000000000000b0 R09: > ffff888274051188 > [ 1226.478665] R10: 0000000000000000 R11: ffffffff82a5dde8 R12: > 000000000000000a > [ 1226.478667] R13: 0000000000000020 R14: 0000000000000001 R15: > ffff888273c07034 > [ 1226.478669] FS: 0000000000000000(0000) GS:ffff888276200000(0000) > knlGS:0000000000000000 > [ 1226.478671] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 1226.478673] CR2: 00007f3bbc06d158 CR3: 000000026427e003 CR4: > 00000000001606f0 > [ 1226.478674] Call Trace: > [ 1226.478674] > [ 1226.478675] serial8250_tx_chars+0xdb/0x220 > [ 1226.478677] serial8250_handle_irq.part.0+0xc5/0x100 > [ 1226.478678] serial8250_default_handle_irq+0x36/0x60 > [ 1226.478679] serial8250_interrupt+0x51/0xa0 > [ 1226.478682] __handle_irq_event_percpu+0x3d/0x180 > [ 1226.478683] handle_irq_event_percpu+0x2c/0x80 > [ 1226.478685] handle_irq_event+0x31/0x4e > [ 1226.478688] handle_edge_irq+0x7e/0x190 > [ 1226.478688] generic_handle_irq+0x1f/0x30 > [ 1226.478708] __evtchn_fifo_handle_events+0x143/0x190 > [ 1226.478709] __xen_evtchn_do_upcall+0x53/0x90 > [ 1226.478710] xen_evtchn_do_upcall+0x22/0x40 > [ 1226.478711] xen_hvm_callback_vector+0xf/0x20 > [ 1226.478712] > [ 1226.478713] RIP: 0010:native_safe_halt+0xe/0x10 > [ 1226.478715] Code: 8b 00 a8 08 74 80 eb c2 90 90 90 90 e9 07 00 00 00 0f > 00 2d 34 a8 4e 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 24 a8 4e 00 fb f4 > 90 41 54 55 53 e8 17 24 47 ff 65 8b 2d 60 37 2e 7e 0f 1f 44 00 > [ 1226.478716] RSP: 0018:ffffffff82a03e98 EFLAGS: 00000246 ORIG_RAX: > ffffffffffffff0c > [ 1226.478719] RAX: ffffffff81d2c820 RBX: 0000000000000000 RCX: > 0000000000000001 > [ 1226.478720] RDX: 0000000000105b7e RSI: 7ffffee81a200469 RDI: > 0000000000000082 > [ 1226.478722] RBP: 0000000000000000 R08: 000000cd42e4dffb R09: > 0000011875f079d6 > [ 1226.478723] R10: 0000000000000000 R11: 0000000000012000 R12: > ffffffff82a15780 > [ 1226.478726] R13: 0000000000000000 R14: 0000000000000000 R15: > ffffffff82a15780 > [ 1226.478727] ? __sched_text_end+0x6/0x6 > [ 1226.478728] default_idle+0x15/0x130 > [ 1226.478730] do_idle+0x1e8/0x250 > [ 1226.478732] cpu_startup_entry+0x14/0x20 > [ 1226.478733] start_kernel+0x4c8/0x4ea > [ 1226.478735] secondary_startup_64+0xa4/0xb0 > > Xen dom0 config: > 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 sched=credit" > > Xen domU config: > name = "test" > kernel = "kernel-5.4.55-gentoo-xen" > memory = 10000 > vcpus = 12 > vif = [ '' ] > disk = [ > '/dev/vg_data/test_root,raw,xvda,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 > > Any tips appreciated, thanks, > Tomas > Just tried Xen staging-4.13 with Linux 5.4.61 and the error cannot be reproduced (tried to reboot the machine twice). A google search led me to https://lkml.org/lkml/2020/4/23/248, but it's related to RT on an older version of the Linux kernel. Tomas --000000000000108f6e05ae781d8e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Wed, Aug 5, 2020 at 9:57 AM Tomas = Mozes <hydrapolic@gmail.com&= gt; wrote:
Hello,
I was trying to upgrade one of my Xen dom0 from stabl= e-4.12 to stable-4.13. The machine has been rock stable on 4.12, but after = the upgrade and reboot, one of the xen-domU (there are 15 virtual machines = on the host) lost it's networking with this in the kernel log:

[= 1226.477594] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[ 1226= .477607] rcu: =C2=A0 =C2=A0 0-....: (8 GPs behind) idle=3Db82/0/0x1 softirq= =3D55602/55602 fqs=3D5250
[ 1226.477613] =C2=A0(detected by 8, t=3D2100= 2 jiffies, g=3D151513, q=3D854)
[ 1226.477619] Sending NMI from CPU 8 to= CPUs 0:
[ 1226.478642] NMI backtrace for cpu 0
[ 1226.478646] CPU: 0= PID: 0 Comm: swapper/0 Not tainted 5.4.55-gentoo #1
[ 1226.478648] Hard= ware name: Xen HVM domU, BIOS 4.13.1 08/03/2020
[ 1226.478650] RIP: 0010= :io_serial_out+0x11/0x20
[ 1226.478654] Code: 8b 57 08 d3 e6 01 f2 ec 0f= b6 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f b6 8f b9 00 00 00 89 d0= 8b 57 08 d3 e6 01 f2 ee <c3> 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f = 00 0f b6 87 ba 00 00 00
[ 1226.478656] RSP: 0018:ffffc90000003e20 EFLAGS= : 00000002
[ 1226.478659] RAX: 0000000000000074 RBX: ffff888271e1c000 RC= X: 0000000000000000
[ 1226.478661] RDX: 00000000000003f8 RSI: 0000000000= 000000 RDI: ffffffff832fcc00
[ 1226.478663] RBP: ffffffff832fcc00 R08: 0= 0000000000000b0 R09: ffff888274051188
[ 1226.478665] R10: 00000000000000= 00 R11: ffffffff82a5dde8 R12: 000000000000000a
[ 1226.478667] R13: 00000= 00000000020 R14: 0000000000000001 R15: ffff888273c07034
[ 1226.478669] F= S: =C2=A00000000000000000(0000) GS:ffff888276200000(0000) knlGS:00000000000= 00000
[ 1226.478671] CS: =C2=A00010 DS: 0000 ES: 0000 CR0: 0000000080050= 033
[ 1226.478673] CR2: 00007f3bbc06d158 CR3: 000000026427e003 CR4: 0000= 0000001606f0
[ 1226.478674] Call Trace:
[ 1226.478674] =C2=A0<IRQ&= gt;
[ 1226.478675] =C2=A0serial8250_tx_chars+0xdb/0x220
[ 1226.478677= ] =C2=A0serial8250_handle_irq.part.0+0xc5/0x100
[ 1226.478678] =C2=A0ser= ial8250_default_handle_irq+0x36/0x60
[ 1226.478679] =C2=A0serial8250_int= errupt+0x51/0xa0
[ 1226.478682] =C2=A0__handle_irq_event_percpu+0x3d/0x1= 80
[ 1226.478683] =C2=A0handle_irq_event_percpu+0x2c/0x80
[ 1226.4786= 85] =C2=A0handle_irq_event+0x31/0x4e
[ 1226.478688] =C2=A0handle_edge_ir= q+0x7e/0x190
[ 1226.478688] =C2=A0generic_handle_irq+0x1f/0x30
[ 1226= .478708] =C2=A0__evtchn_fifo_handle_events+0x143/0x190
[ 1226.478709] = =C2=A0__xen_evtchn_do_upcall+0x53/0x90
[ 1226.478710] =C2=A0xen_evtchn_d= o_upcall+0x22/0x40
[ 1226.478711] =C2=A0xen_hvm_callback_vector+0xf/0x20=
[ 1226.478712] =C2=A0</IRQ>
[ 1226.478713] RIP: 0010:native_sa= fe_halt+0xe/0x10
[ 1226.478715] Code: 8b 00 a8 08 74 80 eb c2 90 90 90 9= 0 e9 07 00 00 00 0f 00 2d 34 a8 4e 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 2= 4 a8 4e 00 fb f4 <c3> 90 41 54 55 53 e8 17 24 47 ff 65 8b 2d 60 37 2e= 7e 0f 1f 44 00
[ 1226.478716] RSP: 0018:ffffffff82a03e98 EFLAGS: 000002= 46 ORIG_RAX: ffffffffffffff0c
[ 1226.478719] RAX: ffffffff81d2c820 RBX: = 0000000000000000 RCX: 0000000000000001
[ 1226.478720] RDX: 0000000000105= b7e RSI: 7ffffee81a200469 RDI: 0000000000000082
[ 1226.478722] RBP: 0000= 000000000000 R08: 000000cd42e4dffb R09: 0000011875f079d6
[ 1226.478723] = R10: 0000000000000000 R11: 0000000000012000 R12: ffffffff82a15780
[ 1226= .478726] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff82a15780<= br>[ 1226.478727] =C2=A0? __sched_text_end+0x6/0x6
[ 1226.478728] =C2=A0= default_idle+0x15/0x130
[ 1226.478730] =C2=A0do_idle+0x1e8/0x250
[ 12= 26.478732] =C2=A0cpu_startup_entry+0x14/0x20
[ 1226.478733] =C2=A0start_= kernel+0x4c8/0x4ea
[ 1226.478735] =C2=A0secondary_startup_64+0xa4/0xb0
Xen dom0 config:
GRUB_CMDLINE_XEN=3D"dom0_mem=3D4G gnttab_max= _frames=3D256 ucode=3Dscan loglvl=3Dall guest_loglvl=3Dall console_to_ring = console_timestamps=3Ddate conring_size=3D1m smt=3Dtrue sched=3Dcredit"=

Xen domU config:
name =3D "test"
kernel =3D "k= ernel-5.4.55-gentoo-xen"
memory =3D 10000
vcpus =3D 12
vif = =3D [ '' ]
disk =3D [
'/dev/vg_data/test_root,raw,xvda,rw= ',
]
extra =3D "root=3D/dev/xvda net.ifnames=3D0 console=3Dt= tyS0 console=3DttyS0,38400n8"
type =3D "hvm"
sdl =3D 0=
vnc =3D 0
serial=3D'pty'
xen_platform_pci=3D1
max_gran= t_frames =3D 256

Any tips appreciated, thanks,
Tomas

Just tried Xen staging-4.13 with Linux 5.4.61 and= the error cannot be reproduced (tried to reboot the machine twice). A goog= le search led me to https:/= /lkml.org/lkml/2020/4/23/248, but it's related to RT on an older ve= rsion of the Linux kernel.

Tomas
--000000000000108f6e05ae781d8e-- From xen-users-bounces@lists.xenproject.org Fri Sep 04 17:22:05 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Fri, 04 Sep 2020 17:22:05 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kEFNU-0003z9-Tp; Fri, 04 Sep 2020 17:19:56 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kEFNT-0003z4-8a for xen-users@lists.xenproject.org; Fri, 04 Sep 2020 17:19:55 +0000 X-Inumbo-ID: 5c589cdf-4aa7-4b34-b3d5-7fd857af469c Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 5c589cdf-4aa7-4b34-b3d5-7fd857af469c; Fri, 04 Sep 2020 17:19:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:References:To:Subject; bh=Be3gjZEft51bdMcLG/aNyUoqpQohgo9OfR1qvxsnWEY=; b=AAdp9nV/GrAufZspLzFHVjDdDp x9vpqzQPiw7oLOAaSuj/GCmVWE/H7Zfh3Wz82QdsARrLGchr4tc7trr/OYnC+aXln78uo64DMD9si L/Y3vWCmVvWyNyhtL3IGqVy+qsyggN6nRmX1NNYNYbOoTy/KNVmJv4By8jD6f6wKu4/o=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kEFNR-0002ML-Lu; Fri, 04 Sep 2020 17:19:53 +0000 Received: from 54-240-197-232.amazon.com ([54.240.197.232] helo=a483e7b01a66.ant.amazon.com) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1kEFNR-0002dT-9K; Fri, 04 Sep 2020 17:19:53 +0000 Subject: Re: AW: Colibri imx8qxp: Missing kernel boot module To: Daniel Wagner2 , "xen-users@lists.xenproject.org" , Peng Fan References: <371b26ab9d3d40528235d89d2bcbf42d@itk-engineering.de> <3e115eb4-d9a4-7123-651c-b6d040edaf14@xen.org> <13be110452c945c792d79c370c8fa5a7@itk-engineering.de> From: Julien Grall Message-ID: Date: Fri, 4 Sep 2020 18:19:51 +0100 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <13be110452c945c792d79c370c8fa5a7@itk-engineering.de> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" On 01/09/2020 15:16, Daniel Wagner2 wrote: > Hello, Hi Daniel, >> On 22/08/2020 13:00, Daniel Wagner2 wrote: >>>>>>>>>> On 10/08/2020 16:32, Daniel Wagner2 wrote: >> I am not entirely sure why yet. Do you mind to enable earlyprintk for your >> platform? With that you should be able to get more information about the >> list of modules discovered. > > I didn't manage to enable earlyprintk. > But I enabled kconfig "Developer Checks": "Verbose debug messages" and > "Devicetree debug messages" and put some extra printks in the Xen Source and > was able to locate the problem. > > When parsing the fdt, the memory@80000000 node throws an error, which stops > the parsing before the /chosen node was found and so no kernel boot module > was found for dom0. > > I bypassed this by putting the /chosen node at the top of the fdt, so that > module@0 gets parsed before the functions arrives at the memory node. After > this change, Dom0 was successfully booted by Xen. > > I have created a pastebin https://pastebin.com/JBjKNvPP for future > reference. > At pastebin line 215 Xen already found the kernel boot module. > So I put > "boot_fdt_info(device_tree_flattened, fdt_paddr);" > in start_xen (arch/arm/setup.c) after the > "console_init_postirq();" > call, so tha the function is run a second time, but this time the outputs > are shown in the bootlog (starting pastebin l. 247). > Starting at pastebin line 337, parser arrives at memory node. > Line 349 is what is specified in the fdt (which I copy here for reference) > > memory@80000000 { > device_type = "memory"; > reg = <0x00000000 0x80000000 0 0x40000000>; > }; > > The first bank found (l. 349) is the one from the fdt node. I am not sure > where the second bank (l. 350) comes from. The the second bank's size=0 ist > what causes the parse to fail and will Xen prevent from finding the boot > kernel for dom0 if the /chosen node comes after the memory node in the fdt. Thank you for digging through the problem. I find a bit odd that Xen discover a second bank. It might be possible we don't parse the Device-Tree correctly. I wasn't able to find the node in the device-tree you provided in the initial e-mail. Would you mind to post the full device-tree? Cheers, -- Julien Grall From xen-users-bounces@lists.xenproject.org Sun Sep 06 16:09:09 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Sun, 06 Sep 2020 16:09:09 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kExCQ-0006CA-Ih; Sun, 06 Sep 2020 16:07:26 +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 4.92) (envelope-from ) id 1kExCP-0006C5-A6 for xen-users@lists.xenproject.org; Sun, 06 Sep 2020 16:07:25 +0000 X-Inumbo-ID: a7f10527-6b6a-4792-92d0-42fb9d74ee03 Received: from mx.mindef.nl (unknown [217.169.235.200]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id a7f10527-6b6a-4792-92d0-42fb9d74ee03; Sun, 06 Sep 2020 16:07:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mindef.nl; h=from : to : subject : date : references : in-reply-to : content-type : mime-version : message-id; s=key01; bh=fuwrrYoRUKfMnt/BgllcO0hY717Ze2+TVd4WxPKeYiM=; b=bklIO/Pps/Q16UJgIB0mSP65GrMy2bQlfV9/G1qNMwi3SqEiwmnoY2iZJQJRi01xm9Iw DETJX7SQzSmsfUeS7Hd2M0F535rT/RkWYiBoPzcK/aLiuU6FDSco7JukboQqrnRwfn+y FyfUpDukSAm7x9ZOPRU6Ijh6OVXWICPKFpx+b02BaAfvSZkUCbeF+2GpyBDkaqD+gzD0 o93nGfWVIE9EUZcm3PE2HqVZUILGTJho5MihHFihiOT0MdrzBqhkUcsXa5s3+LvwtUBq Tez0f3X3adzE4uFkkuzRGhXogc2pxvJPGl5ZwfB2cEiAh5Rbibp8jWgT4S2a9Oae+Q1b jA== Received: by someone from somewhere Message-Id: <33c54g9ru5-1@0151ims402.msg.iegi.nl> Received: from somewhere by someone Received: from somewhere by someone Received: from somewhere by someone From: To: , Subject: Re: xen domU lost networking after upgrading to stable-4.13 Date: Sun, 6 Sep 2020 16:07:20 +0000 References: , In-Reply-To: Accept-Language: en-US, nl-NL Content-Language: en-US Content-Type: multipart/alternative; boundary="_000_36o66nkl11a7ovsgluuikth71599408440824emailplusmobileiro_" MIME-Version: 1.0 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --_000_36o66nkl11a7ovsgluuikth71599408440824emailplusmobileiro_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Why is the vif-line empty? How about vif=3D[=91mac=3D00:16:3e:00:02:01,bridge=3Dbr2=92 ] From: "Tomas Mozes" > Date: Friday, 4 September 2020 at 10:00:33 To: "xen-users@lists.xenproject.org" > Subject: Re: xen domU lost networking after upgrading to stable-4.13 On Wed, Aug 5, 2020 at 9:57 AM Tomas Mozes > wrote: Hello, I was trying to upgrade one of my Xen dom0 from stable-4.12 to stable-4.13.= The machine has been rock stable on 4.12, but after the upgrade and reboot= , one of the xen-domU (there are 15 virtual machines on the host) lost it's= networking with this in the kernel log: [ 1226.477594] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: [ 1226.477607] rcu: 0-....: (8 GPs behind) idle=3Db82/0/0x1 softirq=3D5= 5602/55602 fqs=3D5250 [ 1226.477613] (detected by 8, t=3D21002 jiffies, g=3D151513, q=3D854) [ 1226.477619] Sending NMI from CPU 8 to CPUs 0: [ 1226.478642] NMI backtrace for cpu 0 [ 1226.478646] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.55-gentoo #1 [ 1226.478648] Hardware name: Xen HVM domU, BIOS 4.13.1 08/03/2020 [ 1226.478650] RIP: 0010:io_serial_out+0x11/0x20 [ 1226.478654] Code: 8b 57 08 d3 e6 01 f2 ec 0f b6 c0 c3 66 66 2e 0f 1f 84 = 00 00 00 00 00 66 90 0f b6 8f b9 00 00 00 89 d0 8b 57 08 d3 e6 01 f2 ee 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 0f b6 87 ba 00 00 00 [ 1226.478656] RSP: 0018:ffffc90000003e20 EFLAGS: 00000002 [ 1226.478659] RAX: 0000000000000074 RBX: ffff888271e1c000 RCX: 00000000000= 00000 [ 1226.478661] RDX: 00000000000003f8 RSI: 0000000000000000 RDI: ffffffff832= fcc00 [ 1226.478663] RBP: ffffffff832fcc00 R08: 00000000000000b0 R09: ffff8882740= 51188 [ 1226.478665] R10: 0000000000000000 R11: ffffffff82a5dde8 R12: 00000000000= 0000a [ 1226.478667] R13: 0000000000000020 R14: 0000000000000001 R15: ffff888273c= 07034 [ 1226.478669] FS: 0000000000000000(0000) GS:ffff888276200000(0000) knlGS:= 0000000000000000 [ 1226.478671] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1226.478673] CR2: 00007f3bbc06d158 CR3: 000000026427e003 CR4: 00000000001= 606f0 [ 1226.478674] Call Trace: [ 1226.478674] [ 1226.478675] serial8250_tx_chars+0xdb/0x220 [ 1226.478677] serial8250_handle_irq.part.0+0xc5/0x100 [ 1226.478678] serial8250_default_handle_irq+0x36/0x60 [ 1226.478679] serial8250_interrupt+0x51/0xa0 [ 1226.478682] __handle_irq_event_percpu+0x3d/0x180 [ 1226.478683] handle_irq_event_percpu+0x2c/0x80 [ 1226.478685] handle_irq_event+0x31/0x4e [ 1226.478688] handle_edge_irq+0x7e/0x190 [ 1226.478688] generic_handle_irq+0x1f/0x30 [ 1226.478708] __evtchn_fifo_handle_events+0x143/0x190 [ 1226.478709] __xen_evtchn_do_upcall+0x53/0x90 [ 1226.478710] xen_evtchn_do_upcall+0x22/0x40 [ 1226.478711] xen_hvm_callback_vector+0xf/0x20 [ 1226.478712] [ 1226.478713] RIP: 0010:native_safe_halt+0xe/0x10 [ 1226.478715] Code: 8b 00 a8 08 74 80 eb c2 90 90 90 90 e9 07 00 00 00 0f = 00 2d 34 a8 4e 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 24 a8 4e 00 fb f4 90 41 54 55 53 e8 17 24 47 ff 65 8b 2d 60 37 2e 7e 0f 1f 44 00 [ 1226.478716] RSP: 0018:ffffffff82a03e98 EFLAGS: 00000246 ORIG_RAX: ffffff= ffffffff0c [ 1226.478719] RAX: ffffffff81d2c820 RBX: 0000000000000000 RCX: 00000000000= 00001 [ 1226.478720] RDX: 0000000000105b7e RSI: 7ffffee81a200469 RDI: 00000000000= 00082 [ 1226.478722] RBP: 0000000000000000 R08: 000000cd42e4dffb R09: 0000011875f= 079d6 [ 1226.478723] R10: 0000000000000000 R11: 0000000000012000 R12: ffffffff82a= 15780 [ 1226.478726] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff82a= 15780 [ 1226.478727] ? __sched_text_end+0x6/0x6 [ 1226.478728] default_idle+0x15/0x130 [ 1226.478730] do_idle+0x1e8/0x250 [ 1226.478732] cpu_startup_entry+0x14/0x20 [ 1226.478733] start_kernel+0x4c8/0x4ea [ 1226.478735] secondary_startup_64+0xa4/0xb0 Xen dom0 config: GRUB_CMDLINE_XEN=3D"dom0_mem=3D4G gnttab_max_frames=3D256 ucode=3Dscan logl= vl=3Dall guest_loglvl=3Dall console_to_ring console_timestamps=3Ddate conri= ng_size=3D1m smt=3Dtrue sched=3Dcredit" Xen domU config: name =3D "test" kernel =3D "kernel-5.4.55-gentoo-xen" memory =3D 10000 vcpus =3D 12 vif =3D [ '' ] disk =3D [ '/dev/vg_data/test_root,raw,xvda,rw', ] extra =3D "root=3D/dev/xvda net.ifnames=3D0 console=3DttyS0 console=3DttyS0= ,38400n8" type =3D "hvm" sdl =3D 0 vnc =3D 0 serial=3D'pty' xen_platform_pci=3D1 max_grant_frames =3D 256 Any tips appreciated, thanks, Tomas Just tried Xen staging-4.13 with Linux 5.4.61 and the error cannot be repro= duced (tried to reboot the machine twice). A google search led me to https:= //lkml.org/lkml/2020/4/23/248, but it's related to RT on an older version o= f the Linux kernel. Tomas Dit bericht kan informatie bevatten die niet voor u is bestemd. Indien u ni= et de geadresseerde bent of dit bericht abusievelijk aan u is toegezonden, = wordt u verzocht dat aan de afzender te melden en het bericht te verwijdere= n. De Staat aanvaardt geen aansprakelijkheid voor schade, van welke aard oo= k, die verband houdt met risico's verbonden aan het elektronisch verzenden = van berichten. This message may contain information that is not intended for you. If you a= re not the addressee or if this message was sent to you by mistake, you are= requested to inform the sender and delete the message. The State accepts n= o liability for damage of any kind resulting from the risks inherent in the= electronic transmission of messages. --_000_36o66nkl11a7ovsgluuikth71599408440824emailplusmobileiro_ Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Why is the vif-line empty?
How about
vif=3D[=91mac=3D00:16:3e:00:02:01,bridge=3Dbr2=92 ]



From: "Tomas Mozes" <hydrapolic@gmail.com>
Date: Friday, 4 September 2020 at 10:00:33
To: "xen-users@lists.xenproject.org" <xen-users@lists.xenproject.org>
Subject: Re: xen domU lost networking after upgrading to stable-4.13=



On Wed, Aug 5, 2020 at 9:57 AM Tomas = Mozes <hydrapolic@gmail.com&= gt; wrote:
Hello,
I was trying to upgrade one of my Xen dom0 from stable-4.12 to stable-4.13.= The machine has been rock stable on 4.12, but after the upgrade and reboot= , one of the xen-domU (there are 15 virtual machines on the host) lost it's= networking with this in the kernel log:

[ 1226.477594] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[ 1226.477607] rcu:     0-....: (8 GPs behind) idle=3Db82/0/0x1 s= oftirq=3D55602/55602 fqs=3D5250
[ 1226.477613]  (detected by 8, t=3D21002 jiffies, g=3D151513, q=3D854= )
[ 1226.477619] Sending NMI from CPU 8 to CPUs 0:
[ 1226.478642] NMI backtrace for cpu 0
[ 1226.478646] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.55-gentoo #1 [ 1226.478648] Hardware name: Xen HVM domU, BIOS 4.13.1 08/03/2020
[ 1226.478650] RIP: 0010:io_serial_out+0x11/0x20
[ 1226.478654] Code: 8b 57 08 d3 e6 01 f2 ec 0f b6 c0 c3 66 66 2e 0f 1f 84 = 00 00 00 00 00 66 90 0f b6 8f b9 00 00 00 89 d0 8b 57 08 d3 e6 01 f2 ee <= ;c3> 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 0f b6 87 ba 00 00 00
[ 1226.478656] RSP: 0018:ffffc90000003e20 EFLAGS: 00000002
[ 1226.478659] RAX: 0000000000000074 RBX: ffff888271e1c000 RCX: 00000000000= 00000
[ 1226.478661] RDX: 00000000000003f8 RSI: 0000000000000000 RDI: ffffffff832= fcc00
[ 1226.478663] RBP: ffffffff832fcc00 R08: 00000000000000b0 R09: ffff8882740= 51188
[ 1226.478665] R10: 0000000000000000 R11: ffffffff82a5dde8 R12: 00000000000= 0000a
[ 1226.478667] R13: 0000000000000020 R14: 0000000000000001 R15: ffff888273c= 07034
[ 1226.478669] FS:  0000000000000000(0000) GS:ffff888276200000(0000) k= nlGS:0000000000000000
[ 1226.478671] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1226.478673] CR2: 00007f3bbc06d158 CR3: 000000026427e003 CR4: 00000000001= 606f0
[ 1226.478674] Call Trace:
[ 1226.478674]  <IRQ>
[ 1226.478675]  serial8250_tx_chars+0xdb/0x220
[ 1226.478677]  serial8250_handle_irq.part.0+0xc5/0x100
[ 1226.478678]  serial8250_default_handle_irq+0x36/0x60
[ 1226.478679]  serial8250_interrupt+0x51/0xa0
[ 1226.478682]  __handle_irq_event_percpu+0x3d/0x180
[ 1226.478683]  handle_irq_event_percpu+0x2c/0x80
[ 1226.478685]  handle_irq_event+0x31/0x4e
[ 1226.478688]  handle_edge_irq+0x7e/0x190
[ 1226.478688]  generic_handle_irq+0x1f/0x30
[ 1226.478708]  __evtchn_fifo_handle_events+0x143/0x190
[ 1226.478709]  __xen_evtchn_do_upcall+0x53/0x90
[ 1226.478710]  xen_evtchn_do_upcall+0x22/0x40
[ 1226.478711]  xen_hvm_callback_vector+0xf/0x20
[ 1226.478712]  </IRQ>
[ 1226.478713] RIP: 0010:native_safe_halt+0xe/0x10
[ 1226.478715] Code: 8b 00 a8 08 74 80 eb c2 90 90 90 90 e9 07 00 00 00 0f = 00 2d 34 a8 4e 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 24 a8 4e 00 fb f4 <= ;c3> 90 41 54 55 53 e8 17 24 47 ff 65 8b 2d 60 37 2e 7e 0f 1f 44 00
[ 1226.478716] RSP: 0018:ffffffff82a03e98 EFLAGS: 00000246 ORIG_RAX: ffffff= ffffffff0c
[ 1226.478719] RAX: ffffffff81d2c820 RBX: 0000000000000000 RCX: 00000000000= 00001
[ 1226.478720] RDX: 0000000000105b7e RSI: 7ffffee81a200469 RDI: 00000000000= 00082
[ 1226.478722] RBP: 0000000000000000 R08: 000000cd42e4dffb R09: 0000011875f= 079d6
[ 1226.478723] R10: 0000000000000000 R11: 0000000000012000 R12: ffffffff82a= 15780
[ 1226.478726] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff82a= 15780
[ 1226.478727]  ? __sched_text_end+0x6/0x6
[ 1226.478728]  default_idle+0x15/0x130
[ 1226.478730]  do_idle+0x1e8/0x250
[ 1226.478732]  cpu_startup_entry+0x14/0x20
[ 1226.478733]  start_kernel+0x4c8/0x4ea
[ 1226.478735]  secondary_startup_64+0xa4/0xb0

Xen dom0 config:
GRUB_CMDLINE_XEN=3D"dom0_mem=3D4G gnttab_max_frames=3D256 ucode=3Dscan= loglvl=3Dall guest_loglvl=3Dall console_to_ring console_timestamps=3Ddate = conring_size=3D1m smt=3Dtrue sched=3Dcredit"

Xen domU config:
name =3D "test"
kernel =3D "kernel-5.4.55-gentoo-xen"
memory =3D 10000
vcpus =3D 12
vif =3D [ '' ]
disk =3D [
'/dev/vg_data/test_root,raw,xvda,rw',
]
extra =3D "root=3D/dev/xvda net.ifnames=3D0 console=3DttyS0 console=3D= ttyS0,38400n8"
type =3D "hvm"
sdl =3D 0
vnc =3D 0
serial=3D'pty'
xen_platform_pci=3D1
max_grant_frames =3D 256

Any tips appreciated, thanks,
Tomas

Just tried Xen staging-4.13 with Linux 5.4.61 and the error cannot be = reproduced (tried to reboot the machine twice). A google search led me to https://lkml.org/lkml/2020/= 4/23/248, but it's related to RT on an older version of the Linux kerne= l.

Tomas

Dit bericht kan informatie bevatten die niet voor u is bestemd. Indien u ni= et de geadresseerde bent of dit bericht abusievelijk aan u is toegezonden, = wordt u verzocht dat aan de afzender te melden en het bericht te verwijdere= n. De Staat aanvaardt geen aansprakelijkheid voor schade, van welke aard ook, die verband houdt met risico's verbonden = aan het elektronisch verzenden van berichten.

This message may contain information that is not intended for you. If you a= re not the addressee or if this message was sent to you by mistake, you are= requested to inform the sender and delete the message. The State accepts n= o liability for damage of any kind resulting from the risks inherent in the electronic transmission of messag= es. --_000_36o66nkl11a7ovsgluuikth71599408440824emailplusmobileiro_-- From xen-users-bounces@lists.xenproject.org Sun Sep 06 21:51:20 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Sun, 06 Sep 2020 21:51:20 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kF2Xz-0002GX-0g; Sun, 06 Sep 2020 21:50:03 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kF2Xx-00023A-1A for xen-users@lists.xenproject.org; Sun, 06 Sep 2020 21:50:01 +0000 X-Inumbo-ID: d001f76a-2166-4201-9862-dd74b7f00623 Received: from mxout2.routing.net (unknown [2a03:2900:1:a::b]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id d001f76a-2166-4201-9862-dd74b7f00623; Sun, 06 Sep 2020 21:49:58 +0000 (UTC) Received: from mxbox4.masterlogin.de (unknown [192.168.10.79]) by mxout2.routing.net (Postfix) with ESMTP id 7A3AF5FC23 for ; Sun, 6 Sep 2020 21:49:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailerdienst.de; s=20200217; t=1599428997; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=GQxj7jStlwKl/Cf2Y37KSLCVhLFMvCwpE84IYZr5PUc=; b=SbljCb6xAhNqRjPY3T6rCgEYcJYyGtar4zLYPKjjLQhWWSIWkfblErwkJXtarRGsX1IoFy W90YO7CSUTiMigq1tUbFcE5bR4POzSjkyctwhN5oj5TwTAT3ADGANZSInOXSsY8p+8PC+P LTgu3nRHCQyT7v/JvrfJ9cw7Gf2bYP8= Received: from webmail.hosting.de (unknown [134.0.26.148]) by mxbox4.masterlogin.de (Postfix) with ESMTPA id 4F0638026E for ; Sun, 6 Sep 2020 21:49:57 +0000 (UTC) MIME-Version: 1.0 Date: Sun, 06 Sep 2020 23:49:57 +0200 From: Stefan Kadow To: xen-users@lists.xenproject.org Subject: Win10 DomU with QXL graphics unusable Message-ID: <581fc2238c487785f64fac277f57504d@ska67.de> X-Sender: xen@ska67.de User-Agent: Roundcube Webmail/1.3.13 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" Hello, when using QXL graphics in win10 domU, the system runs as long as I use the Windows Basic Display Adapter. When I install the latest qxldod driver from Fedora/RedHat, the system becomes unusable. Delayed response times of 30s and more. I have tried ovmf and seabios, but with the same result. When I copy the Qemu commandline from verbose xl output, I get a software emulated slow but usable/responsive System. The only thing I had to change is the machine type from xenfv to pc. Is this a Xen or a Qemu related problem? I tried unsuccessfully to patch the source code of the xl toolkit, because I think it is a problem with the machine type "pc,accel=xen", which is set by xl when calling qemu. -- THX for any help! From xen-users-bounces@lists.xenproject.org Sun Sep 06 22:48:42 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Sun, 06 Sep 2020 22:48:42 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kF3R7-0007Hr-1y; Sun, 06 Sep 2020 22:47:01 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kEwj4-00037c-Eq for xen-users@lists.xenproject.org; Sun, 06 Sep 2020 15:37:07 +0000 X-Inumbo-ID: 8a272873-254d-4992-9b09-c2399458a131 Received: from mxout4.routing.net (unknown [2a03:2900:1:a::9]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 8a272873-254d-4992-9b09-c2399458a131; Sun, 06 Sep 2020 15:37:04 +0000 (UTC) Received: from mxbox2.masterlogin.de (unknown [192.168.10.89]) by mxout4.routing.net (Postfix) with ESMTP id B4EA81014AC for ; Sun, 6 Sep 2020 15:37:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailerdienst.de; s=20200217; t=1599406622; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=Z6pZFffJcqqFf1MWhESvKqZQkBZDU+IR9y5D8UgaBtE=; b=gQNPlPDCL2ftrQGeauVRwe7gRzLI9yBPL8x0jP6TA93hiOuHr1Zkv61htG/7ULs/gURTMu fOLxYp2Dirkuv71e1x9MJdpkL8jhQSjdFiJ+ppRGkLriDWRHU3w+dEVlsAJbAPL1od8xqe 2iOcT7Xq3BKY289UcGG1WArlJDGUBz4= Received: from naboo.starwars.lan (HSI-KBW-109-192-178-165.hsi6.kabel-badenwuerttemberg.de [109.192.178.165]) by mxbox2.masterlogin.de (Postfix) with ESMTPSA id 784FB10056C for ; Sun, 6 Sep 2020 15:37:02 +0000 (UTC) Received: from triton.localnet (triton.starwars.lan [192.168.152.150]) by naboo.starwars.lan (Postfix) with ESMTP id D3DF861960 for ; Sun, 6 Sep 2020 17:37:04 +0200 (CEST) From: Stefan To: xen-users@lists.xenproject.org Subject: Win10 DomU with QXL graphics unusable Date: Sun, 06 Sep 2020 17:37:01 +0200 Message-ID: <2335901.Mp2irbmoCP@triton> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Mailman-Approved-At: Sun, 06 Sep 2020 22:47:00 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" Hello, when using QXL graphics in win10 domU, the system runs as long as I use the Windows Basic Display Adapter. When I install the latest qxldod driver from Fedora/RedHat, the system becomes unusable. Delayed response times of 30s and more. I have tried ovmf and seabios, but with the same result. When I copy the Qemu commandline from verbose xl output, I get a software emulated slow but usable/responsive System. The only thing I had to change is the machine type from xenfv to pc. Is this a Xen or a Qemu related problem? I tried unsuccessfully to patch the source code of the xl toolkit, because I think it is a problem with the machine type "pc,accel=xen", which is set by xl when calling qemu. -- THX for any help! From xen-users-bounces@lists.xenproject.org Mon Sep 07 05:36:16 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 07 Sep 2020 05:36:16 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kF9nt-0007xI-Ea; Mon, 07 Sep 2020 05:34:57 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kF9ns-0007xD-9C for xen-users@lists.xenproject.org; Mon, 07 Sep 2020 05:34:56 +0000 X-Inumbo-ID: 27b54aac-c248-4806-8a5b-7e4b76ed0cb0 Received: from mail-qk1-x72b.google.com (unknown [2607:f8b0:4864:20::72b]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 27b54aac-c248-4806-8a5b-7e4b76ed0cb0; Mon, 07 Sep 2020 05:34:54 +0000 (UTC) Received: by mail-qk1-x72b.google.com with SMTP id d20so11836356qka.5 for ; Sun, 06 Sep 2020 22:34:54 -0700 (PDT) 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 :cc; bh=6xtj3FTYhCbAGPo/sWTArGdeyhglBVPEXX5X97DIW9k=; b=KyXKxdWplrS5hoDY8VEqc8zANdPQuE6K3TKO6DUjtgHpc/cclS2vH48B8RAvV1p43g Kj+ZB9P00RFVfs+Z1a9/LfnMy1vR1MwM599vazPfoUrsZfyd8KK1wFmJ9AKYfQdygji9 nWpn4Z6OukEgE+Mj/4jOIGKa+QjiPGAEsoh+3do5wnSCaw6Fdhi7QrJBjB0iLnQxM6pb 5kOaNekXpKZ8ZX72z4JJ1hxyfgfnKflxV3kXSRw/aYiObd4XoV+bjFKc6cO6ixQ93pTG ghlWSpFFmGLHlWS5xkafIh9s/YdPaKZeHB5kRjEufm55i+MK9R/kJL6W9I6mNjq5955U zvwg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=6xtj3FTYhCbAGPo/sWTArGdeyhglBVPEXX5X97DIW9k=; b=kR9dBx7BL+Iyq3xbd7VNbbqFpHbTc31KUqqyEOuh3yrxUrDHb3w+L31SzvRIgiBeUM f67ZW+04F0PAZhySEfI7OBSalwU7EDEKi/YS58/s+AKgGzz3uqcXshdYTCsl5rE1mFU9 JgrRYX+WVORZmHDu/jjdD43sVhwul2c2OdfB5HvpEwB/3Z/D/wKHTteC+VOjJ2TN+/qz JS1ira3/Shtkk1pKib1oymopX+3a4Pf3z7hf0JXMP7gGkbB/7z4FiC57vQRPVDdSOxAS nKu/7fD4/i0/8e6Ho6R97K2IZ8rfnGOJ5PgbRDJ0C41a84TJg0ZDrsI39inMHdAB5kor a0QQ== X-Gm-Message-State: AOAM532DhaqE82//Y8GmDIf0saC/zogcuREI8avi7dPt/bQJKGcUlTH2 Yc/ea6FP0XMkMkqtvXKP0oYRJEOqRhXzFeThJS0= X-Google-Smtp-Source: ABdhPJxRyRHjf74vjoaXtGhteeni7fkQ3tbIwbEffAcmO1zWJ+nzIP6XEJD0ztdeKb8ZMh01/d0XP6/46AFBvWbvT+I= X-Received: by 2002:a37:4ac9:: with SMTP id x192mr3728768qka.294.1599456894411; Sun, 06 Sep 2020 22:34:54 -0700 (PDT) MIME-Version: 1.0 References: <33c54g9ru5-1@0151ims402.msg.iegi.nl> In-Reply-To: <33c54g9ru5-1@0151ims402.msg.iegi.nl> From: Tomas Mozes Date: Mon, 7 Sep 2020 07:34:51 +0200 Message-ID: Subject: Re: xen domU lost networking after upgrading to stable-4.13 To: J.Witvliet@mindef.nl Cc: xen-users@lists.xenproject.org Content-Type: multipart/alternative; boundary="00000000000006a28f05aeb29476" X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --00000000000006a28f05aeb29476 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sun, Sep 6, 2020 at 6:07 PM wrote: > Why is the vif-line empty? > How about > vif=3D[=E2=80=98mac=3D00:16:3e:00:02:01,bridge=3Dbr2=E2=80=99 ] > > > > *From: *"Tomas Mozes" > *Date:* Friday, 4 September 2020 at 10:00:33 > *To: *"xen-users@lists.xenproject.org" > *Subject:* Re: xen domU lost networking after upgrading to stable-4.13 > > > > On Wed, Aug 5, 2020 at 9:57 AM Tomas Mozes wrote: > >> Hello, >> I was trying to upgrade one of my Xen dom0 from stable-4.12 to >> stable-4.13. The machine has been rock stable on 4.12, but after the >> upgrade and reboot, one of the xen-domU (there are 15 virtual machines o= n >> the host) lost it's networking with this in the kernel log: >> >> [ 1226.477594] rcu: INFO: rcu_sched detected stalls on CPUs/tasks: >> [ 1226.477607] rcu: 0-....: (8 GPs behind) idle=3Db82/0/0x1 >> softirq=3D55602/55602 fqs=3D5250 >> [ 1226.477613] (detected by 8, t=3D21002 jiffies, g=3D151513, q=3D854) >> [ 1226.477619] Sending NMI from CPU 8 to CPUs 0: >> [ 1226.478642] NMI backtrace for cpu 0 >> [ 1226.478646] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.55-gentoo #= 1 >> [ 1226.478648] Hardware name: Xen HVM domU, BIOS 4.13.1 08/03/2020 >> [ 1226.478650] RIP: 0010:io_serial_out+0x11/0x20 >> [ 1226.478654] Code: 8b 57 08 d3 e6 01 f2 ec 0f b6 c0 c3 66 66 2e 0f 1f >> 84 00 00 00 00 00 66 90 0f b6 8f b9 00 00 00 89 d0 8b 57 08 d3 e6 01 f2 = ee >> 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 0f b6 87 ba 00 00 00 >> [ 1226.478656] RSP: 0018:ffffc90000003e20 EFLAGS: 00000002 >> [ 1226.478659] RAX: 0000000000000074 RBX: ffff888271e1c000 RCX: >> 0000000000000000 >> [ 1226.478661] RDX: 00000000000003f8 RSI: 0000000000000000 RDI: >> ffffffff832fcc00 >> [ 1226.478663] RBP: ffffffff832fcc00 R08: 00000000000000b0 R09: >> ffff888274051188 >> [ 1226.478665] R10: 0000000000000000 R11: ffffffff82a5dde8 R12: >> 000000000000000a >> [ 1226.478667] R13: 0000000000000020 R14: 0000000000000001 R15: >> ffff888273c07034 >> [ 1226.478669] FS: 0000000000000000(0000) GS:ffff888276200000(0000) >> knlGS:0000000000000000 >> [ 1226.478671] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> [ 1226.478673] CR2: 00007f3bbc06d158 CR3: 000000026427e003 CR4: >> 00000000001606f0 >> [ 1226.478674] Call Trace: >> [ 1226.478674] >> [ 1226.478675] serial8250_tx_chars+0xdb/0x220 >> [ 1226.478677] serial8250_handle_irq.part.0+0xc5/0x100 >> [ 1226.478678] serial8250_default_handle_irq+0x36/0x60 >> [ 1226.478679] serial8250_interrupt+0x51/0xa0 >> [ 1226.478682] __handle_irq_event_percpu+0x3d/0x180 >> [ 1226.478683] handle_irq_event_percpu+0x2c/0x80 >> [ 1226.478685] handle_irq_event+0x31/0x4e >> [ 1226.478688] handle_edge_irq+0x7e/0x190 >> [ 1226.478688] generic_handle_irq+0x1f/0x30 >> [ 1226.478708] __evtchn_fifo_handle_events+0x143/0x190 >> [ 1226.478709] __xen_evtchn_do_upcall+0x53/0x90 >> [ 1226.478710] xen_evtchn_do_upcall+0x22/0x40 >> [ 1226.478711] xen_hvm_callback_vector+0xf/0x20 >> [ 1226.478712] >> [ 1226.478713] RIP: 0010:native_safe_halt+0xe/0x10 >> [ 1226.478715] Code: 8b 00 a8 08 74 80 eb c2 90 90 90 90 e9 07 00 00 00 >> 0f 00 2d 34 a8 4e 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 24 a8 4e 00 fb = f4 >> 90 41 54 55 53 e8 17 24 47 ff 65 8b 2d 60 37 2e 7e 0f 1f 44 00 >> [ 1226.478716] RSP: 0018:ffffffff82a03e98 EFLAGS: 00000246 ORIG_RAX: >> ffffffffffffff0c >> [ 1226.478719] RAX: ffffffff81d2c820 RBX: 0000000000000000 RCX: >> 0000000000000001 >> [ 1226.478720] RDX: 0000000000105b7e RSI: 7ffffee81a200469 RDI: >> 0000000000000082 >> [ 1226.478722] RBP: 0000000000000000 R08: 000000cd42e4dffb R09: >> 0000011875f079d6 >> [ 1226.478723] R10: 0000000000000000 R11: 0000000000012000 R12: >> ffffffff82a15780 >> [ 1226.478726] R13: 0000000000000000 R14: 0000000000000000 R15: >> ffffffff82a15780 >> [ 1226.478727] ? __sched_text_end+0x6/0x6 >> [ 1226.478728] default_idle+0x15/0x130 >> [ 1226.478730] do_idle+0x1e8/0x250 >> [ 1226.478732] cpu_startup_entry+0x14/0x20 >> [ 1226.478733] start_kernel+0x4c8/0x4ea >> [ 1226.478735] secondary_startup_64+0xa4/0xb0 >> >> Xen dom0 config: >> GRUB_CMDLINE_XEN=3D"dom0_mem=3D4G gnttab_max_frames=3D256 ucode=3Dscan l= oglvl=3Dall >> guest_loglvl=3Dall console_to_ring console_timestamps=3Ddate conring_siz= e=3D1m >> smt=3Dtrue sched=3Dcredit" >> >> Xen domU config: >> name =3D "test" >> kernel =3D "kernel-5.4.55-gentoo-xen" >> memory =3D 10000 >> vcpus =3D 12 >> vif =3D [ '' ] >> disk =3D [ >> '/dev/vg_data/test_root,raw,xvda,rw', >> ] >> extra =3D "root=3D/dev/xvda net.ifnames=3D0 console=3DttyS0 console=3Dtt= yS0,38400n8" >> type =3D "hvm" >> sdl =3D 0 >> vnc =3D 0 >> serial=3D'pty' >> xen_platform_pci=3D1 >> max_grant_frames =3D 256 >> >> Any tips appreciated, thanks, >> Tomas >> > > Just tried Xen staging-4.13 with Linux 5.4.61 and the error cannot be > reproduced (tried to reboot the machine twice). A google search led me to > https://lkml.org/lkml/2020/4/23/248, but it's related to RT on an older > version of the Linux kernel. > > Tomas > > Dit bericht kan informatie bevatten die niet voor u is bestemd. Indien u > niet de geadresseerde bent of dit bericht abusievelijk aan u is > toegezonden, wordt u verzocht dat aan de afzender te melden en het berich= t > te verwijderen. De Staat aanvaardt geen aansprakelijkheid voor schade, va= n > welke aard ook, die verband houdt met risico's verbonden aan het > elektronisch verzenden van berichten. > > This message may contain information that is not intended for you. If you > are not the addressee or if this message was sent to you by mistake, you > are requested to inform the sender and delete the message. The State > accepts no liability for damage of any kind resulting from the risks > inherent in the electronic transmission of messages. > Hello, the vif line is empty, because the defaults are fine for me (random MAC and xenbr0 as bridge). Tomas --00000000000006a28f05aeb29476 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
On Sun, Sep 6, 2020 at 6:07 PM <J.Witvliet@mindef.nl> wrote:
Why is the vif-line empty?
How about
vif=3D[=E2=80=98mac=3D00:16:3e:00:02:01,bridge=3Dbr2=E2=80=99 ]



From: "Tomas Mozes" <hydrapolic@gmail.com>
Date: Friday, 4 September 2020 at 10:00:33
To: "xen-users@lists.xenproject.org" <xen-users@lists.xenprojec= t.org>
Subject: Re: xen domU lost networking after upgrading to stable-4.13=



On Wed, Aug 5, 2020 at 9:57 AM Tomas = Mozes <hydrapo= lic@gmail.com> wrote:
Hello,
I was trying to upgrade one of my Xen dom0 from stable-4.12 to stable-4.13.= The machine has been rock stable on 4.12, but after the upgrade and reboot= , one of the xen-domU (there are 15 virtual machines on the host) lost it&#= 39;s networking with this in the kernel log:

[ 1226.477594] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[ 1226.477607] rcu: =C2=A0 =C2=A0 0-....: (8 GPs behind) idle=3Db82/0/0x1 s= oftirq=3D55602/55602 fqs=3D5250
[ 1226.477613] =C2=A0(detected by 8, t=3D21002 jiffies, g=3D151513, q=3D854= )
[ 1226.477619] Sending NMI from CPU 8 to CPUs 0:
[ 1226.478642] NMI backtrace for cpu 0
[ 1226.478646] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.55-gentoo #1 [ 1226.478648] Hardware name: Xen HVM domU, BIOS 4.13.1 08/03/2020
[ 1226.478650] RIP: 0010:io_serial_out+0x11/0x20
[ 1226.478654] Code: 8b 57 08 d3 e6 01 f2 ec 0f b6 c0 c3 66 66 2e 0f 1f 84 = 00 00 00 00 00 66 90 0f b6 8f b9 00 00 00 89 d0 8b 57 08 d3 e6 01 f2 ee <= ;c3> 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 0f b6 87 ba 00 00 00
[ 1226.478656] RSP: 0018:ffffc90000003e20 EFLAGS: 00000002
[ 1226.478659] RAX: 0000000000000074 RBX: ffff888271e1c000 RCX: 00000000000= 00000
[ 1226.478661] RDX: 00000000000003f8 RSI: 0000000000000000 RDI: ffffffff832= fcc00
[ 1226.478663] RBP: ffffffff832fcc00 R08: 00000000000000b0 R09: ffff8882740= 51188
[ 1226.478665] R10: 0000000000000000 R11: ffffffff82a5dde8 R12: 00000000000= 0000a
[ 1226.478667] R13: 0000000000000020 R14: 0000000000000001 R15: ffff888273c= 07034
[ 1226.478669] FS: =C2=A00000000000000000(0000) GS:ffff888276200000(0000) k= nlGS:0000000000000000
[ 1226.478671] CS: =C2=A00010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1226.478673] CR2: 00007f3bbc06d158 CR3: 000000026427e003 CR4: 00000000001= 606f0
[ 1226.478674] Call Trace:
[ 1226.478674] =C2=A0<IRQ>
[ 1226.478675] =C2=A0serial8250_tx_chars+0xdb/0x220
[ 1226.478677] =C2=A0serial8250_handle_irq.part.0+0xc5/0x100
[ 1226.478678] =C2=A0serial8250_default_handle_irq+0x36/0x60
[ 1226.478679] =C2=A0serial8250_interrupt+0x51/0xa0
[ 1226.478682] =C2=A0__handle_irq_event_percpu+0x3d/0x180
[ 1226.478683] =C2=A0handle_irq_event_percpu+0x2c/0x80
[ 1226.478685] =C2=A0handle_irq_event+0x31/0x4e
[ 1226.478688] =C2=A0handle_edge_irq+0x7e/0x190
[ 1226.478688] =C2=A0generic_handle_irq+0x1f/0x30
[ 1226.478708] =C2=A0__evtchn_fifo_handle_events+0x143/0x190
[ 1226.478709] =C2=A0__xen_evtchn_do_upcall+0x53/0x90
[ 1226.478710] =C2=A0xen_evtchn_do_upcall+0x22/0x40
[ 1226.478711] =C2=A0xen_hvm_callback_vector+0xf/0x20
[ 1226.478712] =C2=A0</IRQ>
[ 1226.478713] RIP: 0010:native_safe_halt+0xe/0x10
[ 1226.478715] Code: 8b 00 a8 08 74 80 eb c2 90 90 90 90 e9 07 00 00 00 0f = 00 2d 34 a8 4e 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 24 a8 4e 00 fb f4 <= ;c3> 90 41 54 55 53 e8 17 24 47 ff 65 8b 2d 60 37 2e 7e 0f 1f 44 00
[ 1226.478716] RSP: 0018:ffffffff82a03e98 EFLAGS: 00000246 ORIG_RAX: ffffff= ffffffff0c
[ 1226.478719] RAX: ffffffff81d2c820 RBX: 0000000000000000 RCX: 00000000000= 00001
[ 1226.478720] RDX: 0000000000105b7e RSI: 7ffffee81a200469 RDI: 00000000000= 00082
[ 1226.478722] RBP: 0000000000000000 R08: 000000cd42e4dffb R09: 0000011875f= 079d6
[ 1226.478723] R10: 0000000000000000 R11: 0000000000012000 R12: ffffffff82a= 15780
[ 1226.478726] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff82a= 15780
[ 1226.478727] =C2=A0? __sched_text_end+0x6/0x6
[ 1226.478728] =C2=A0default_idle+0x15/0x130
[ 1226.478730] =C2=A0do_idle+0x1e8/0x250
[ 1226.478732] =C2=A0cpu_startup_entry+0x14/0x20
[ 1226.478733] =C2=A0start_kernel+0x4c8/0x4ea
[ 1226.478735] =C2=A0secondary_startup_64+0xa4/0xb0

Xen dom0 config:
GRUB_CMDLINE_XEN=3D"dom0_mem=3D4G gnttab_max_frames=3D256 ucode=3Dscan= loglvl=3Dall guest_loglvl=3Dall console_to_ring console_timestamps=3Ddate = conring_size=3D1m smt=3Dtrue sched=3Dcredit"

Xen domU config:
name =3D "test"
kernel =3D "kernel-5.4.55-gentoo-xen"
memory =3D 10000
vcpus =3D 12
vif =3D [ '' ]
disk =3D [
'/dev/vg_data/test_root,raw,xvda,rw',
]
extra =3D "root=3D/dev/xvda net.ifnames=3D0 console=3DttyS0 console=3D= ttyS0,38400n8"
type =3D "hvm"
sdl =3D 0
vnc =3D 0
serial=3D'pty'
xen_platform_pci=3D1
max_grant_frames =3D 256

Any tips appreciated, thanks,
Tomas

Just tried Xen staging-4.13 with Linux 5.4.61 and the error cannot be = reproduced (tried to reboot the machine twice). A google search led me to https://l= kml.org/lkml/2020/4/23/248, but it's related to RT on an older vers= ion of the Linux kernel.

Tomas

Dit bericht kan informatie bevatten die niet voor u is bestemd. Indien u ni= et de geadresseerde bent of dit bericht abusievelijk aan u is toegezonden, = wordt u verzocht dat aan de afzender te melden en het bericht te verwijdere= n. De Staat aanvaardt geen aansprakelijkheid voor schade, van welke aard ook, die verband houdt met risico's verbon= den aan het elektronisch verzenden van berichten.

This message may contain information that is not intended for you. If you a= re not the addressee or if this message was sent to you by mistake, you are= requested to inform the sender and delete the message. The State accepts n= o liability for damage of any kind resulting from the risks inherent in the electronic transmission of messag= es.

Hello,
the vif line is emp= ty, because the defaults are fine for me (random MAC and xenbr0 as bridge).=

Tomas
--00000000000006a28f05aeb29476-- From xen-users-bounces@lists.xenproject.org Wed Sep 09 05:23:14 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Wed, 09 Sep 2020 05:23:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kFsYI-0008Sf-Av; Wed, 09 Sep 2020 05:21:50 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kFsYG-0008SX-QW for xen-users@lists.xenproject.org; Wed, 09 Sep 2020 05:21:49 +0000 X-Inumbo-ID: 378589b5-33c6-4a8b-a28a-a7232e691ccf Received: from mail-40135.protonmail.ch (unknown [185.70.40.135]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 378589b5-33c6-4a8b-a28a-a7232e691ccf; Wed, 09 Sep 2020 05:21:44 +0000 (UTC) Date: Wed, 09 Sep 2020 05:21:40 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail; t=1599628903; bh=89kpePIVwXWhB+oWylYMOBOhlRAb71k6UK161GnVduw=; h=Date:To:From:Reply-To:Subject:From; b=w3jrH+dT5nqiw9/b9v3FHW1+1ggeR7ASmOzHUEYqrynVNRwlpOgGFmxZDFiV6IQ2j ryhh5QK78PYrkJY5BHeZYXQDDyIIUxKStTDvq6/0lTD8s6ZakSzfc3CMgxvk7vRRXn iQ4OeEq0RirmBtRqTTZG0DARiyDQCoLKA+jrQMjE= To: "xen-users@lists.xenproject.org" From: Mogens Jensen Subject: VGA: VBIOS image corrupt (bad pcioffset field)? Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-1.2 required=10.0 tests=ALL_TRUSTED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM shortcircuit=no autolearn=disabled version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on mailout.protonmail.ch X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Reply-To: Mogens Jensen Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" I'm trying to passthrough the Intel IGD on an Intel Ivy Bridge system with Xen 4.13 installed. 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller Booting the DomU fails with this error message: VGA: VBIOS image corrupt (bad pcioffset field) "dmesg" prints these messages: --- pciback 0000:00:02.0: timeout during reset resource sanity check: requesting [mem 0x000c0000-0x000dffff], which spans more than PCI Bus 0000:00 [mem 0x000c0000-0x000c3fff window] caller pci_map_rom+0x6a/0x17d mapping multiple BARs pciback 0000:00:02.0: Invalid PCI ROM data signature: expecting 0x52494350, got 0xe938aa55 --- "xl dmesg" shows that the entire ring buffer is filled with this message: --- (XEN) [VT-D]DMAR:[DMA Read] Request device [0000:00:02.0] fault addr 93b2f5000 --- The system firmware is coreboot configured to use libgfxinit. Does anyone have an idea how to solve this? Thanks. Regards, Mogens Jensen From xen-users-bounces@lists.xenproject.org Wed Sep 09 11:21:45 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Wed, 09 Sep 2020 11:21:45 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kFy9Y-0001mp-OE; Wed, 09 Sep 2020 11:20:40 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kFy9W-0001mk-P9 for xen-users@lists.xenproject.org; Wed, 09 Sep 2020 11:20:38 +0000 X-Inumbo-ID: 99740671-e915-43c3-bd26-828f6f1e2f32 Received: from mx0.itk-engineering.de (unknown [212.121.145.30]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 99740671-e915-43c3-bd26-828f6f1e2f32; Wed, 09 Sep 2020 11:20:36 +0000 (UTC) From: Daniel Wagner2 To: Julien Grall , "xen-users@lists.xenproject.org" Subject: AW: Colibri imx8qxp: Missing kernel boot module Thread-Topic: Colibri imx8qxp: Missing kernel boot module Thread-Index: AdaGmzuUXzQkjs8cTny0+sgmUAo8ww== Date: Wed, 9 Sep 2020 11:20:34 +0000 Message-ID: Accept-Language: de-DE, en-US Content-Language: de-DE X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-c2processedorg: bf590b95-2eae-4fb0-b3c4-e2662b925c35 Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=2.16.840.1.101.3.4.2.3; boundary="----=_NextPart_000_000F_01D686AB.FF3596C0" MIME-Version: 1.0 x-msw-jemd-newsletter: false X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" ------=_NextPart_000_000F_01D686AB.FF3596C0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit > >> I am not entirely sure why yet. Do you mind to enable earlyprintk for > >> your platform? With that you should be able to get more information > >> about the list of modules discovered. > > > > I didn't manage to enable earlyprintk. > > But I enabled kconfig "Developer Checks": "Verbose debug messages" and > > "Devicetree debug messages" and put some extra printks in the Xen > > Source and was able to locate the problem. > > > > When parsing the fdt, the memory@80000000 node throws an error, which > > stops the parsing before the /chosen node was found and so no kernel > > boot module was found for dom0. > > > > I bypassed this by putting the /chosen node at the top of the fdt, so > > that > > module@0 gets parsed before the functions arrives at the memory node. > > After this change, Dom0 was successfully booted by Xen. > > > > I have created a pastebin https://pastebin.com/JBjKNvPP for future > > reference. > > At pastebin line 215 Xen already found the kernel boot module. > > So I put > > "boot_fdt_info(device_tree_flattened, fdt_paddr);" > > in start_xen (arch/arm/setup.c) after the "console_init_postirq();" > > call, so tha the function is run a second time, but this time the > > outputs are shown in the bootlog (starting pastebin l. 247). > > Starting at pastebin line 337, parser arrives at memory node. > > Line 349 is what is specified in the fdt (which I copy here for > > reference) > > > > memory@80000000 { > > device_type = "memory"; > > reg = <0x00000000 0x80000000 0 0x40000000>; }; > > > > The first bank found (l. 349) is the one from the fdt node. I am not > > sure where the second bank (l. 350) comes from. The the second bank's > > size=0 ist what causes the parse to fail and will Xen prevent from > > finding the boot kernel for dom0 if the /chosen node comes after the memory > node in the fdt. > > Thank you for digging through the problem. I find a bit odd that Xen discover a > second bank. It might be possible we don't parse the Device-Tree correctly. > > I wasn't able to find the node in the device-tree you provided in the initial e-mail. > Would you mind to post the full device-tree? Hello Julien, this is the full version of the fdt that threw the error: https://pastebin.com/63TZ9z3k The problematic memory node appears in line 126 Greetings Daniel ------=_NextPart_000_000F_01D686AB.FF3596C0 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCCGIow ggRoMIIDUKADAgECAg83NRRmfkG6TWrQeQbivbcwDQYJKoZIhvcNAQEFBQAwSzESMBAGCgmSJomT 8ixkARkWAmRlMR8wHQYKCZImiZPyLGQBGRYPaXRrLWVuZ2luZWVyaW5nMRQwEgYDVQQDEwtJVEst Uk9PVC1DQTAeFw0xMTA4MDQxMjA1NTRaFw0zMTA4MDQxMjE1NTNaMEsxEjAQBgoJkiaJk/IsZAEZ FgJkZTEfMB0GCgmSJomT8ixkARkWD2l0ay1lbmdpbmVlcmluZzEUMBIGA1UEAxMLSVRLLVJPT1Qt Q0EwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCURptpxkeRen0Z3FqDJmVCZEHrxGl/ CknSG6tSIWAl6Z5kG+GmbFEd4dK268mnm4sPRnH5uostWrOPP4d+9ODBSgysFpm9YVUfgg7SUL2A Aa8Fc3tedcPVD1SAAloo6SRMig1RCDjW77g3MVUFm83QMRAIhkuR31NhUcNXu5MW2LkZNihrE741 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781a2277-d446-4ca3-97ae-682305741503; Fri, 11 Sep 2020 13:22:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:Cc:References:To:Subject; bh=XPihMKvjHRwSEsfgQLv3VvIiTc9Kf0M3aZU+e69LTNI=; b=XiTpL+R7fcgxpU/J+tsQN4THWS tbdqds3T/EMDlwyZPjWwWZf3skIdjKAfGIeKYxwBZFPPRF3RCTZdMBuhEbvBJL2xSsJrR34LcX4Lg xthG7PcNS7KoGjqSLRLltblIubTnV114YyKvD7E3+cXWCqe6eH5V9DpZJB68K5OfpJHU=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kGj0c-0000xA-Dx; Fri, 11 Sep 2020 13:22:34 +0000 Received: from 54-240-197-233.amazon.com ([54.240.197.233] helo=a483e7b01a66.ant.amazon.com) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1kGj0b-00078E-0E; Fri, 11 Sep 2020 13:22:34 +0000 Subject: Re: AW: Colibri imx8qxp: Missing kernel boot module To: Daniel Wagner2 , "xen-users@lists.xenproject.org" References: Cc: Stefano Stabellini From: Julien Grall Message-ID: Date: Fri, 11 Sep 2020 14:22:31 +0100 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" On 09/09/2020 12:20, Daniel Wagner2 wrote: > Hello Julien, Hi Daniel, > > this is the full version of the fdt that threw the error: > https://pastebin.com/63TZ9z3k > The problematic memory node appears in line 126 Thanks! The output looks corrupted as some of the lines are not valid DTB: fsl,pins = * 0x000000009300184c [0x00000048]; Although, I am not sure if it is just U-boot dumping the DTB differently. Anyway, after removing the "corrupted" line, I managed to get a compile the DTB. I don't have a Colibri IMX8QXP. However, given this is an early parsing error, I have just embed the DTB in Xen binary via CONFIG_DTB_FILE. Unfortunately I couldn't reproduce your error. This either suggests the DTB gets corrupted or Xen doesn't access the DTB with the correct memory attribute. Do you have the DTB in hand? Cheers, -- Julien Grall From xen-users-bounces@lists.xenproject.org Sat Sep 12 11:53:10 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Sat, 12 Sep 2020 11:53:10 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kH44M-0000Ov-Io; Sat, 12 Sep 2020 11:51:50 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kH44K-0000Op-V4 for xen-users@lists.xenproject.org; Sat, 12 Sep 2020 11:51:49 +0000 X-Inumbo-ID: e1dba175-a780-4c50-912a-f601adba304a Received: from mxout2.routing.net (unknown [2a03:2900:1:a::b]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id e1dba175-a780-4c50-912a-f601adba304a; Sat, 12 Sep 2020 11:51:47 +0000 (UTC) Received: from mxbox4.masterlogin.de (unknown [192.168.10.79]) by mxout2.routing.net (Postfix) with ESMTP id 24B5A5FB57 for ; Sat, 12 Sep 2020 11:51:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailerdienst.de; s=20200217; t=1599911506; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=gfdeAJM/Z+RpcnZEWxN+V3uUnHWIOv7gL2ZDio7Jwdc=; b=iz5s7gbZQRWVFkrmJKYJDFydjLCsxfrvzgQ8Ea8+lMxkesXd395//qtrzeAj60/OnRVOsj n7MDMkCitl6Ve+To/gpHfH/8EN+shkpOshNmYPqttJyB/6ODF5jfO7xlJ06ywhSMlJauGD Gm2m6klxmLw4ffRP+ZmBUISuXYE3BcA= Received: from naboo.starwars.lan (HSI-KBW-109-193-246-153.hsi7.kabel-badenwuerttemberg.de [109.193.246.153]) by mxbox4.masterlogin.de (Postfix) with ESMTPSA id DECA98009F for ; Sat, 12 Sep 2020 11:51:45 +0000 (UTC) Received: from triton.localnet (triton.starwars.lan [192.168.152.150]) by naboo.starwars.lan (Postfix) with ESMTP id 5154C618A5 for ; Sat, 12 Sep 2020 13:52:05 +0200 (CEST) From: Stefan Kadow To: xen-users@lists.xenproject.org Subject: Re: Win10 DomU with QXL graphics unusable Date: Sat, 12 Sep 2020 13:51:45 +0200 Message-ID: <2052194.IQQFDEs5gd@triton> In-Reply-To: <581fc2238c487785f64fac277f57504d@ska67.de> References: <581fc2238c487785f64fac277f57504d@ska67.de> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Reply-To: xen@ska67.de Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" Am Sonntag, 6. September 2020, 23:49:57 CEST schrieb Stefan Kadow: > Hello, > > when using QXL graphics in win10 domU, the system runs as long as I use > the > Windows Basic Display Adapter. When I install the latest qxldod driver > from > Fedora/RedHat, the system becomes unusable. Delayed response times of > 30s and > more. I have tried ovmf and seabios, but with the same result. > > When I copy the Qemu commandline from verbose xl output, I get a > software > emulated slow but usable/responsive System. The only thing I had to > change is > the machine type from xenfv to pc. > > Is this a Xen or a Qemu related problem? > > I tried unsuccessfully to patch the source code of the xl toolkit, > because I > think it is a problem with the machine type "pc,accel=xen", which is set > by xl > when calling qemu. I have managed to patch the source code so that the call to Qemu uses "pc" as machine type. I also extended the startup timeout so that the domU runs long enough to check the stability. Now I can confirm that QXL graphics cannot be used with the machine types "xenvf" and "pc,accel=xen", no matter if seabios or ovmf is used. Where can I file a bug for this problem? -- THX for any help! From xen-users-bounces@lists.xenproject.org Mon Sep 14 14:27:41 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 14 Sep 2020 14:27:41 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kHpR6-0003ej-57; Mon, 14 Sep 2020 14:26:28 +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 4.92) (envelope-from ) id 1kHpR4-0003eY-MO for xen-users@lists.xenproject.org; Mon, 14 Sep 2020 14:26:26 +0000 X-Inumbo-ID: efdf61ef-ba3f-4f4a-9320-e6d9c936c78d Received: from mx0.itk-engineering.de (unknown [212.121.145.30]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id efdf61ef-ba3f-4f4a-9320-e6d9c936c78d; Mon, 14 Sep 2020 14:26:24 +0000 (UTC) From: Daniel Wagner2 To: Julien Grall , "xen-users@lists.xenproject.org" Subject: AW: AW: Colibri imx8qxp: Missing kernel boot module Thread-Topic: AW: Colibri imx8qxp: Missing kernel boot module Thread-Index: AdaGmzuUXzQkjs8cTny0+sgmUAo8wwBkpsSAAJrdZfA= Date: Mon, 14 Sep 2020 14:26:22 +0000 Message-ID: References: In-Reply-To: Accept-Language: de-DE, en-US Content-Language: de-DE X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-c2processedorg: bf590b95-2eae-4fb0-b3c4-e2662b925c35 Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=2.16.840.1.101.3.4.2.3; boundary="----=_NextPart_000_003C_01D68AB3.C84BD3C0" MIME-Version: 1.0 x-msw-jemd-newsletter: false X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" ------=_NextPart_000_003C_01D68AB3.C84BD3C0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit > Hi Daniel, Hi Julien, > > > > > this is the full version of the fdt that threw the error: > > https://pastebin.com/63TZ9z3k > > The problematic memory node appears in line 126 > > Thanks! The output looks corrupted as some of the lines are not valid DTB: > > fsl,pins = * 0x000000009300184c [0x00000048]; > > Although, I am not sure if it is just U-boot dumping the DTB differently. > > Anyway, after removing the "corrupted" line, I managed to get a compile the > DTB. I don't have a Colibri IMX8QXP. However, given this is an early parsing > error, I have just embed the DTB in Xen binary via CONFIG_DTB_FILE. > > Unfortunately I couldn't reproduce your error. This either suggests the DTB gets > corrupted or Xen doesn't access the DTB with the correct memory attribute. > > Do you have the DTB in hand? Sorry for the corrupted version, I've uploaded the DTB (fsl-imx8qxp-colibri-eval-v3.dtb) to https://drive.google.com/drive/folders/1jbpnz35sC0NbCyEjrkLqelBsKBztW1S6?usp =sharing I have also uploaded my modified xen source files. 1. arch/arm/bootfdt.c where I have added the additional printk's seen in the log and 2. arch/arm/setup.c where I rerun the devicetree parser in line 935 to get the logs, since the console is not yet initialised when the function is called for the first time and I didn't manage to enable earlyprintk. I think the breaking point is the second memory bank which appears in the logs (see the output line marked with "!!") with start=0x8 8000 0000 and size=0. It isn't specified in the DTB, so I am not sure where this comes from. It has size=0 so if ( !size ) { printk("invalid size, bank %d\n",i); return -EINVAL; } In bootfdt.c makes the function stop. Log: (XEN) arch/arm/bootfdt.c: early_scan_node (XEN) -> fdt: node `memory@80000000': parsing (XEN) -> process_memory_node (XEN) (XEN) arch/arm/bootfdt.c: process_memory_node (XEN) ->found memory:reg (XEN) ->cell= (XEN) ->banks=2 (XEN) ->mem->nr_banks=1 (XEN) ->NR_MEM_BANKS=128 (XEN) ->start=0x80200000 size=0x7fe00000 !! (XEN) ->start=0x880000000 size=0 (XEN) invalid size, bank 1 (XEN) END of arch/arm/bootfdt.c: process_memory_node Btw 8_8000_0000 is the start address of this systems DDR Main memory, according to the Reference Manual of the i.MX8QXP. I hope this helps in reproducing the error. Cheers, Daniel Wagner ------=_NextPart_000_003C_01D68AB3.C84BD3C0 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCCGIow ggRoMIIDUKADAgECAg83NRRmfkG6TWrQeQbivbcwDQYJKoZIhvcNAQEFBQAwSzESMBAGCgmSJomT 8ixkARkWAmRlMR8wHQYKCZImiZPyLGQBGRYPaXRrLWVuZ2luZWVyaW5nMRQwEgYDVQQDEwtJVEst Uk9PVC1DQTAeFw0xMTA4MDQxMjA1NTRaFw0zMTA4MDQxMjE1NTNaMEsxEjAQBgoJkiaJk/IsZAEZ FgJkZTEfMB0GCgmSJomT8ixkARkWD2l0ay1lbmdpbmVlcmluZzEUMBIGA1UEAxMLSVRLLVJPT1Qt Q0EwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCURptpxkeRen0Z3FqDJmVCZEHrxGl/ CknSG6tSIWAl6Z5kG+GmbFEd4dK268mnm4sPRnH5uostWrOPP4d+9ODBSgysFpm9YVUfgg7SUL2A Aa8Fc3tedcPVD1SAAloo6SRMig1RCDjW77g3MVUFm83QMRAIhkuR31NhUcNXu5MW2LkZNihrE741 5iNfxDykYWWzC1F0J3EOTCaFkKPLcm4cTKA6xydvMEGqDBno6bHMavPKFsARFoavhkl1Awjy6fph eB6TWd1xR/XOuNsAmJCCUfIep82El3FPcWm5R/R7COjT3MvrJAS/OaB5m4/Kk6WpFAvAPZ0DCjGD 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p9so17616503ejf.6 for ; Mon, 21 Sep 2020 06:05:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=AVE2kNejOd9cOOZktsnqlugQCg70X6ZpVDeFIZMqJvo=; b=dmRoAdocCQYPX9GvHWI0cPG50tAXuRuSd/wTl+c2eBZnTp2LC3UMl8xUEo+uZQa4KG Ypg1ydbvlE/cHFmUK9FTjBq0eiUK6UHkkeC4qHcqLNhh5qkLCrTy/N1T7c2Lp3jh00nE DKA9t8TJ/gk9mkafRizFDEXBwAoNjrVYItutchpTjawUDjz2OAqXbKxv/Dqod/ysExfe 1srry3Gvn6PTYY5UkZlewc+1cUXk7x8w3xmY935Dxd0GjDlFSZhCdwjkvWhpv/gsL6/U fThdC0rFDhj5XJmbDul2OEfpoCg4s2Q54b65YE0ZfPuhEO49JzL8FuV5OriThx4lEJLm 90iw== 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=AVE2kNejOd9cOOZktsnqlugQCg70X6ZpVDeFIZMqJvo=; b=bMZqFt89/9HuA5kkFMrBLX78gV6HoKt+mX70QQh5982EDz5BjaYRNE1toYl6qPBU7h fiSoVa4RkvHY+j2nI0F4s1PcjsJQLMdqdyD7Y2le+VyMBTohe7xf9YqT2ct5fD3ZcLiX YXAnN9ZV+3z6zBnR3iC4XhP9TXtKcN8Pkh2tJ9JHaz+y4cf5z/oUjRWdS1QX77EZm7CC 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are developing a solution based on Xen 4.13 who is constantly creating / destroying VMs. To summarize our lifecycle : - xl restore vmX - xl cd-insert .... - We do our stuff for ~ 2 minutes - xl destroy vmX So our VMs have a life of approximately 2 minutes. The number of VMs we ran in parallel depends on the underlying server. We are seeing the issue with our larger server who is running 30 VMs (HVM) in parallel. On this server oxenstored is constantly running at 100% cpu usage and some VMs are almost stucked or unresponsive. This is not an hardware issue, 72 xeon cores, 160 GB of memory and very fast I/O subsystem. Everything else is running smoothly on the server. what we witness in the xenstore-access.log is that the number of WATCH event is matching the number of currently running VMs so for example for a single WRITE event is followed by around 30 watch events : [20200918T15:15:18.045Z] A41354 write /local/domain/0/backend/qdisk/1311/5632 [20200918T15:15:18.046Z] A41248 w event backend/qdisk/1311/5632 38ed11d9-9a38-4022-ad75-7c571d4886ed [20200918T15:15:18.046Z] A41257 w event backend/qdisk/1311/5632 98fa91b8-e88b-4667-9813-d95196257288 [20200918T15:15:18.046Z] A40648 w event backend/qdisk/1311/5632 e6fd9a35-61ec-4750-93eb-999fb7f662fc [20200918T15:15:18.046Z] A40542 w event backend/qdisk/1311/5632 6a39c858-2fd4-46e4-a810-485a41328f8c [20200918T15:15:18.046Z] A41141 w event backend/qdisk/1311/5632 8762d552-b4b4-41ef-a2aa-23700f790ea2 [20200918T15:15:18.046Z] A41310 w event backend/qdisk/1311/5632 4dc2a9ae-6388-4b0c-9c98-df3c897a832f [20200918T15:15:18.046Z] A40660 w event backend/qdisk/1311/5632 6abf244d-5939-4540-b176-4ec7d14b392c [20200918T15:15:18.046Z] A41347 w event backend/qdisk/1311/5632 ecb93157-9929-43e2-8ed4-f5e78ab2f37d [20200918T15:15:18.046Z] A41015 w event backend/qdisk/1311/5632 a1fec49f-e7cc-4059-87d3-ce43f386746e [20200918T15:15:18.046Z] A41167 w event backend/qdisk/1311/5632 e9419014-9fd2-47c0-b79d-30f99d9530d6 [20200918T15:15:18.046Z] A41100 w event backend/qdisk/1311/5632 a2754a91-ecd6-4b6b-87ea-b68db8b888df [20200918T15:15:18.046Z] A41147 w event backend/qdisk/1311/5632 176a1c3c-add7-4710-a7ee-3b5548d7a56a [20200918T15:15:18.046Z] A41305 w event backend/qdisk/1311/5632 afe7933b-c92d-4403-8d6c-2e530558c937 [20200918T15:15:18.046Z] A40616 w event backend/qdisk/1311/5632 35fa45e0-21e8-4666-825b-0c3d629f378d [20200918T15:15:18.046Z] A40951 w event backend/qdisk/1311/5632 230eb42f-d700-46ce-af61-89242847a978 [20200918T15:15:18.046Z] A40567 w event backend/qdisk/1311/5632 39cc7ffb-5045-4120-beb7-778073927c93 [20200918T15:15:18.046Z] A41363 w event backend/qdisk/1311/5632 9e42e74a-80fb-46e8-81f2-718628bf70f6 [20200918T15:15:18.046Z] A40740 w event backend/qdisk/1311/5632 1a64af31-fee6-45be-b8d8-c98baa5e162f [20200918T15:15:18.046Z] A40632 w event backend/qdisk/1311/5632 466ef522-cb76-4117-8e93-42471897c353 [20200918T15:15:18.046Z] A41319 w event backend/qdisk/1311/5632 19ea986b-e303-4180-b833-c691b2b32819 [20200918T15:15:18.046Z] A40677 w event backend/qdisk/1311/5632 fb01629a-033b-41d6-8349-cec82e570238 [20200918T15:15:18.046Z] A41152 w event backend/qdisk/1311/5632 84ce9e29-a5cc-42a1-a47b-497b95767885 [20200918T15:15:18.047Z] A41233 w event backend/qdisk/1311/5632 ea944ad3-3af6-4688-8076-db1eac25d8e9 [20200918T15:15:18.047Z] A41069 w event backend/qdisk/1311/5632 ce57e169-e1ea-4fb5-b97f-23e651f49d79 [20200918T15:15:18.047Z] A41287 w event backend/qdisk/1311/5632 d31110c8-ae0b-4b9d-b71f-aa2985addd1a [20200918T15:15:18.047Z] A40683 w event backend/qdisk/1311/5632 f0e4b0a0-fad0-4bb7-b01e-b8a31107ba3d [20200918T15:15:18.047Z] A41177 w event backend/qdisk/1311/5632 9ff80e49-4cca-4ec9-901a-d30198104f29 [20200918T15:15:18.047Z] D0 w event backend/qdisk/1311/5632 FFFFFFFF8276B520 [20200918T15:15:18.047Z] A40513 w event backend/qdisk/1311/5632 d35a9a42-c15e-492c-a70d-d8b20bafec8f [20200918T15:15:18.047Z] A41354 w event backend/qdisk/1311/5632 e4456ca4-70f4-4afc-9ba1-4a1cfd74c8e6 We are not sure this is the root cause of the issue but this is the only real difference we can see in the log. We don't understand why the number of WATCH events is related to the number of concurrent running VM. A watch event should be registered and only fired for the current domain ID, so a write for a specific node path should only trigger one watch event and not 30 in our case. Any ideas / comments ? Thanks Jerome Leseinne From xen-users-bounces@lists.xenproject.org Mon Sep 21 15:27:27 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 21 Sep 2020 15:27:27 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKNhZ-0004e8-Eq; Mon, 21 Sep 2020 15:26:01 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKNhX-0004e3-IH for xen-users@lists.xenproject.org; Mon, 21 Sep 2020 15:25:59 +0000 X-Inumbo-ID: fe04b72d-b90b-4752-9d4c-f0ef5739337e Received: from mail-wm1-x334.google.com (unknown [2a00:1450:4864:20::334]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id fe04b72d-b90b-4752-9d4c-f0ef5739337e; Mon, 21 Sep 2020 15:25:58 +0000 (UTC) Received: by mail-wm1-x334.google.com with SMTP id s13so12523469wmh.4 for ; Mon, 21 Sep 2020 08:25:58 -0700 (PDT) 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 :cc; bh=Y388NgR3blXuU9m4boYPOhdSxSrSnJ/eLsanBUw58io=; b=OXMWylNkVFWuZYhpoK4fjv8vRwMpEb+UA1aZL0gMKU6Qq1Y+kQWbzsi4aaJJSeVPts TNGCryGLuJFI5v2YuneVOjd7zAlNu79k51J93DN4Uw8nTcoZNhyUKB1jXScpT6fRg38c ISkv66tZY9dMWCi3NWmzoEDGdKpd5Kv8sM3CPH/XZGpk0rwQZwPMBYg8KVLElINHetW9 wry/C/U/bbYHhN0D70Doy1nGh5vq89ugPNU5TH2XPkTGZ7X0NeEU/g8d/QvcKz4d6ek6 HfOvvw+YPHxDT/hs20mgJFOSq/0omA8Yj5/ho7xYFtHXfqO2mFG6sjpkKM1ygDdSB+Sc Qeeg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=Y388NgR3blXuU9m4boYPOhdSxSrSnJ/eLsanBUw58io=; b=RqzrPQdij6tjdTbHxY8oRKqu6Ny26npsVBodSqJODFVvf9w4TzUwU+ihqqRyfPubXQ Zbq7zFYjHa+ezXjWrRExLSIEgeYochSHgZ/9Ye1IxLt+KeZlKA1z/2pEm2IdJDMbrLzP kkuvop1qP3HalTBfw5edTa9YHK4RCdZ/0z3uzXrMzeEgL9oFTPuBaUeL6FFwXaTHBhrp HZEqaBP7pp5bF6Wz+u85vwVIbLzD+14XgHAi8BogZl9moUkPnVpt0Ekp6AA9ffBcVFlB 5RaJAZ9IDavURj7oU3QwT154dhwFtNQnNfjj//v8gUp8bGR+XkHQV2COODI0fQ+B8S3A uB+w== X-Gm-Message-State: AOAM533hdZJITrk2+soBGHXtrAGPPzKYX8tsfK9X3ywJ90oMJ9oAgHPB eU26VshkBfuCRXEUlTR9O979x1xjsow4M7Aksrk= X-Google-Smtp-Source: ABdhPJyrdeNlCTUpPtHt5rSvoyYhhbH16b40h6v+aP9Csu3C+x2QuGssUw3APVfvaUvMlZPK7FVN623G2zP4E8WObgA= X-Received: by 2002:a1c:2905:: with SMTP id p5mr141598wmp.187.1600701957150; Mon, 21 Sep 2020 08:25:57 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Fanny Dwargee Date: Mon, 21 Sep 2020 17:25:46 +0200 Message-ID: Subject: Re: oxenstored performance issue when starting VMs in parallel To: jerome leseinne Cc: xen-users@lists.xenproject.org Content-Type: multipart/alternative; boundary="0000000000008c20df05afd47785" X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --0000000000008c20df05afd47785 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable El lun., 21 sept. 2020 a las 15:10, jerome leseinne (< jerome.leseinne@gmail.com>) escribi=C3=B3: > Hello, > > We are developing a solution based on Xen 4.13 who is constantly > creating / destroying VMs. > > To summarize our lifecycle : > > - xl restore vmX > - xl cd-insert .... > - We do our stuff for ~ 2 minutes > - xl destroy vmX > > So our VMs have a life of approximately 2 minutes. > > The number of VMs we ran in parallel depends on the underlying server. > > We are seeing the issue with our larger server who is running 30 VMs > (HVM) in parallel. > > On this server oxenstored is constantly running at 100% cpu usage and > some VMs are almost stucked or unresponsive. > > This is not an hardware issue, 72 xeon cores, 160 GB of memory and > very fast I/O subsystem. > Everything else is running smoothly on the server. > > what we witness in the xenstore-access.log is that the number of WATCH > event is matching the number of currently running VMs > > so for example for a single WRITE event is followed by around 30 watch > events : > > [20200918T15:15:18.045Z] A41354 write > /local/domain/0/backend/qdisk/1311/5632 > [20200918T15:15:18.046Z] A41248 w event > backend/qdisk/1311/5632 38ed11d9-9a38-4022-ad75-7c571d4886ed > [20200918T15:15:18.046Z] A41257 w event > backend/qdisk/1311/5632 98fa91b8-e88b-4667-9813-d95196257288 > [20200918T15:15:18.046Z] A40648 w event > backend/qdisk/1311/5632 e6fd9a35-61ec-4750-93eb-999fb7f662fc > [20200918T15:15:18.046Z] A40542 w event > backend/qdisk/1311/5632 6a39c858-2fd4-46e4-a810-485a41328f8c > [20200918T15:15:18.046Z] A41141 w event > backend/qdisk/1311/5632 8762d552-b4b4-41ef-a2aa-23700f790ea2 > [20200918T15:15:18.046Z] A41310 w event > backend/qdisk/1311/5632 4dc2a9ae-6388-4b0c-9c98-df3c897a832f > [20200918T15:15:18.046Z] A40660 w event > backend/qdisk/1311/5632 6abf244d-5939-4540-b176-4ec7d14b392c > [20200918T15:15:18.046Z] A41347 w event > backend/qdisk/1311/5632 ecb93157-9929-43e2-8ed4-f5e78ab2f37d > [20200918T15:15:18.046Z] A41015 w event > backend/qdisk/1311/5632 a1fec49f-e7cc-4059-87d3-ce43f386746e > [20200918T15:15:18.046Z] A41167 w event > backend/qdisk/1311/5632 e9419014-9fd2-47c0-b79d-30f99d9530d6 > [20200918T15:15:18.046Z] A41100 w event > backend/qdisk/1311/5632 a2754a91-ecd6-4b6b-87ea-b68db8b888df > [20200918T15:15:18.046Z] A41147 w event > backend/qdisk/1311/5632 176a1c3c-add7-4710-a7ee-3b5548d7a56a > [20200918T15:15:18.046Z] A41305 w event > backend/qdisk/1311/5632 afe7933b-c92d-4403-8d6c-2e530558c937 > [20200918T15:15:18.046Z] A40616 w event > backend/qdisk/1311/5632 35fa45e0-21e8-4666-825b-0c3d629f378d > [20200918T15:15:18.046Z] A40951 w event > backend/qdisk/1311/5632 230eb42f-d700-46ce-af61-89242847a978 > [20200918T15:15:18.046Z] A40567 w event > backend/qdisk/1311/5632 39cc7ffb-5045-4120-beb7-778073927c93 > [20200918T15:15:18.046Z] A41363 w event > backend/qdisk/1311/5632 9e42e74a-80fb-46e8-81f2-718628bf70f6 > [20200918T15:15:18.046Z] A40740 w event > backend/qdisk/1311/5632 1a64af31-fee6-45be-b8d8-c98baa5e162f > [20200918T15:15:18.046Z] A40632 w event > backend/qdisk/1311/5632 466ef522-cb76-4117-8e93-42471897c353 > [20200918T15:15:18.046Z] A41319 w event > backend/qdisk/1311/5632 19ea986b-e303-4180-b833-c691b2b32819 > [20200918T15:15:18.046Z] A40677 w event > backend/qdisk/1311/5632 fb01629a-033b-41d6-8349-cec82e570238 > [20200918T15:15:18.046Z] A41152 w event > backend/qdisk/1311/5632 84ce9e29-a5cc-42a1-a47b-497b95767885 > [20200918T15:15:18.047Z] A41233 w event > backend/qdisk/1311/5632 ea944ad3-3af6-4688-8076-db1eac25d8e9 > [20200918T15:15:18.047Z] A41069 w event > backend/qdisk/1311/5632 ce57e169-e1ea-4fb5-b97f-23e651f49d79 > [20200918T15:15:18.047Z] A41287 w event > backend/qdisk/1311/5632 d31110c8-ae0b-4b9d-b71f-aa2985addd1a > [20200918T15:15:18.047Z] A40683 w event > backend/qdisk/1311/5632 f0e4b0a0-fad0-4bb7-b01e-b8a31107ba3d > [20200918T15:15:18.047Z] A41177 w event > backend/qdisk/1311/5632 9ff80e49-4cca-4ec9-901a-d30198104f29 > [20200918T15:15:18.047Z] D0 w event > backend/qdisk/1311/5632 FFFFFFFF8276B520 > [20200918T15:15:18.047Z] A40513 w event > backend/qdisk/1311/5632 d35a9a42-c15e-492c-a70d-d8b20bafec8f > [20200918T15:15:18.047Z] A41354 w event > backend/qdisk/1311/5632 e4456ca4-70f4-4afc-9ba1-4a1cfd74c8e6 > > We are not sure this is the root cause of the issue but this is the > only real difference we can see in the log. > > We don't understand why the number of WATCH events is related to the > number of concurrent running VM. > A watch event should be registered and only fired for the current > domain ID, so a write for a specific node path should only trigger one > watch event and not 30 in our case. > > Any ideas / comments ? > > Thanks > > Jerome Leseinne > > Jerome, we are experiencing very similar issues in Xen v4.12.3 (Debian 10.4) with a similar setup (128GB RAM, 48 cores), in our case we start and stop dozens of HVM VMs in parallel using restore from a memory saved file and analyzing automatically a software behaviour inside the guest during a few minutes. Any ideas/comments for improving the oxenstore performance will be very welcome. --0000000000008c20df05afd47785 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


=
El lun., 21 sept. 2020 a las 15:10, j= erome leseinne (<jerome.les= einne@gmail.com>) escribi=C3=B3:
Hello,

We are developing a solution based on Xen 4.13 who is constantly
creating / destroying VMs.

To summarize our lifecycle :

- xl restore vmX
- xl cd-insert ....
- We do our stuff for ~ 2 minutes
- xl destroy vmX

So our VMs have a life of approximately 2 minutes.

The number of VMs we ran in parallel depends on the underlying server.

We are seeing the issue with our larger server who is running 30 VMs
(HVM) in parallel.

On this server oxenstored is constantly running at 100% cpu usage and
some VMs are almost stucked or unresponsive.

This is not an hardware issue, 72 xeon cores, 160 GB of memory and
very fast I/O subsystem.
Everything else is running smoothly on the server.

what we witness in the xenstore-access.log is that the number of WATCH
event is matching the number of currently running VMs

so for example for a single WRITE event is followed by around 30 watch even= ts :

[20200918T15:15:18.045Z]=C2=A0 A41354=C2=A0 =C2=A0 =C2=A0 =C2=A0write
/local/domain/0/backend/qdisk/1311/5632
[20200918T15:15:18.046Z]=C2=A0 A41248=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 38ed11d9-9a38-4022-ad75-7c571d4886ed
[20200918T15:15:18.046Z]=C2=A0 A41257=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 98fa91b8-e88b-4667-9813-d95196257288
[20200918T15:15:18.046Z]=C2=A0 A40648=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 e6fd9a35-61ec-4750-93eb-999fb7f662fc
[20200918T15:15:18.046Z]=C2=A0 A40542=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 6a39c858-2fd4-46e4-a810-485a41328f8c
[20200918T15:15:18.046Z]=C2=A0 A41141=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 8762d552-b4b4-41ef-a2aa-23700f790ea2
[20200918T15:15:18.046Z]=C2=A0 A41310=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 4dc2a9ae-6388-4b0c-9c98-df3c897a832f
[20200918T15:15:18.046Z]=C2=A0 A40660=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 6abf244d-5939-4540-b176-4ec7d14b392c
[20200918T15:15:18.046Z]=C2=A0 A41347=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 ecb93157-9929-43e2-8ed4-f5e78ab2f37d
[20200918T15:15:18.046Z]=C2=A0 A41015=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 a1fec49f-e7cc-4059-87d3-ce43f386746e
[20200918T15:15:18.046Z]=C2=A0 A41167=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 e9419014-9fd2-47c0-b79d-30f99d9530d6
[20200918T15:15:18.046Z]=C2=A0 A41100=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 a2754a91-ecd6-4b6b-87ea-b68db8b888df
[20200918T15:15:18.046Z]=C2=A0 A41147=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 176a1c3c-add7-4710-a7ee-3b5548d7a56a
[20200918T15:15:18.046Z]=C2=A0 A41305=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 afe7933b-c92d-4403-8d6c-2e530558c937
[20200918T15:15:18.046Z]=C2=A0 A40616=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 35fa45e0-21e8-4666-825b-0c3d629f378d
[20200918T15:15:18.046Z]=C2=A0 A40951=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 230eb42f-d700-46ce-af61-89242847a978
[20200918T15:15:18.046Z]=C2=A0 A40567=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 39cc7ffb-5045-4120-beb7-778073927c93
[20200918T15:15:18.046Z]=C2=A0 A41363=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 9e42e74a-80fb-46e8-81f2-718628bf70f6
[20200918T15:15:18.046Z]=C2=A0 A40740=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 1a64af31-fee6-45be-b8d8-c98baa5e162f
[20200918T15:15:18.046Z]=C2=A0 A40632=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 466ef522-cb76-4117-8e93-42471897c353
[20200918T15:15:18.046Z]=C2=A0 A41319=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 19ea986b-e303-4180-b833-c691b2b32819
[20200918T15:15:18.046Z]=C2=A0 A40677=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 fb01629a-033b-41d6-8349-cec82e570238
[20200918T15:15:18.046Z]=C2=A0 A41152=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 84ce9e29-a5cc-42a1-a47b-497b95767885
[20200918T15:15:18.047Z]=C2=A0 A41233=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 ea944ad3-3af6-4688-8076-db1eac25d8e9
[20200918T15:15:18.047Z]=C2=A0 A41069=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 ce57e169-e1ea-4fb5-b97f-23e651f49d79
[20200918T15:15:18.047Z]=C2=A0 A41287=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 d31110c8-ae0b-4b9d-b71f-aa2985addd1a
[20200918T15:15:18.047Z]=C2=A0 A40683=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 f0e4b0a0-fad0-4bb7-b01e-b8a31107ba3d
[20200918T15:15:18.047Z]=C2=A0 A41177=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 9ff80e49-4cca-4ec9-901a-d30198104f29
[20200918T15:15:18.047Z]=C2=A0 D0=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0w= event
backend/qdisk/1311/5632 FFFFFFFF8276B520
[20200918T15:15:18.047Z]=C2=A0 A40513=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 d35a9a42-c15e-492c-a70d-d8b20bafec8f
[20200918T15:15:18.047Z]=C2=A0 A41354=C2=A0 =C2=A0 =C2=A0 =C2=A0w event
backend/qdisk/1311/5632 e4456ca4-70f4-4afc-9ba1-4a1cfd74c8e6

We are not sure this is the root cause of the issue but this is the
only real difference we can see in the log.

We don't understand why the number of WATCH events is related to the number of concurrent running VM.
A watch event should be registered and only fired for the current
domain ID, so a write for a specific node path should only trigger one
watch event and not 30 in our case.

Any ideas / comments ?

Thanks

Jerome Leseinne


Jerome,
we are experiencing = very similar issues in Xen v4.12.3 (Debian 10.4) with a similar setup (128G= B RAM, 48 cores), in our case we start and stop dozens of HVM VMs in parall= el using restore from a memory saved file and analyzing automatically a sof= tware behaviour inside the guest during a few minutes.

=
Any ideas/comments for improving the oxenstore performance will be ver= y welcome.
=C2=A0
--0000000000008c20df05afd47785-- From xen-users-bounces@lists.xenproject.org Mon Sep 21 16:04:34 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 21 Sep 2020 16:04:34 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKOHY-0000f5-RX; Mon, 21 Sep 2020 16:03:12 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKOHY-0000f0-4T for xen-users@lists.xenproject.org; Mon, 21 Sep 2020 16:03:12 +0000 X-Inumbo-ID: 4d53b31b-bcfe-48b6-bed2-3bb053645fdd Received: from mail-ej1-x641.google.com (unknown [2a00:1450:4864:20::641]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 4d53b31b-bcfe-48b6-bed2-3bb053645fdd; Mon, 21 Sep 2020 16:03:10 +0000 (UTC) Received: by mail-ej1-x641.google.com with SMTP id z22so18462033ejl.7 for ; Mon, 21 Sep 2020 09:03:10 -0700 (PDT) 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 :cc:content-transfer-encoding; bh=dOrw6lkE3C7UMYfFExvhjXFwpYlYAat3IaLuj3HfH2U=; b=owCy7Aqlnc/v/FScfFiJl4S2kNjw+/S5+t30Ted4hX+/iKNRYHdUuag6047sR4QqZJ 2UrXVH1OMhiDeLRlHZ7UgUuzYek/T5stwb3uBtEFmxyPWVDT1Y3BHDRszLLKWdLlemHf yOfFwJDvQpJFtILEqMeqN+10LUNNy776PUKtJHA4SXcT18qu/0srRWTVcniyVM3qVHNY LATMV0Y2HVsjLnsm7c35s8s/kBZ7UXOVzg3wr2PEYuLrti8PS7mPSD9N97Sx75wv+DMv TmI+5uF13CaeFPk8ti5WZ5eGpVrAbm4To9QDkBPdW3vS6YjjYU7p7mXdorkVFsgmL6+i vqmg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=dOrw6lkE3C7UMYfFExvhjXFwpYlYAat3IaLuj3HfH2U=; b=JQXv7VQaxQRYSht6/G3miflUwHG58zMSAoL79JjCoLbkdAgIBVR31TMCmIComultCw fEN6+Cc9KryPO+kW+fWKXC5xebTCmwgrQJpzKrJr5Lc436ug8i6zr16eK2g3HM6IOoed DMc/9RvCiObCruGrl6pdR8dq5V8Kxc+AY6Wdo6iccCmlFcM0rLVQXdVMSWL18XJqtbx9 MYtngODQhVvWXSYzzzqi7SvhEdxT55hG8Jbu7xND6TPqNf8w5PHiMDUE3Nt221jqYe35 kypPHw6Dbaji3d3q8gfcb7S3wRo8CK2e78xTwsjDMyeUoTWKNa8QqeltMoUE3k1VQdpw t3HQ== X-Gm-Message-State: AOAM532DnDA8wTQZzC/okHdJtlKryoMXki0hNE4FpCIIgo3Th84tthd4 JH32hDh81H3xSJyK8aRmj/qmpmlLnHsI0KZJQyo= X-Google-Smtp-Source: ABdhPJwR79AxdYEr+boriKJdnDFcG72n8BDXwvWhG9ijW48krS3z58Dt3rHcZOEDxPFteXFEnbPBNjCjqaQVqo8immc= X-Received: by 2002:a17:906:cc8d:: with SMTP id oq13mr147071ejb.280.1600704189826; Mon, 21 Sep 2020 09:03:09 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: jerome leseinne Date: Mon, 21 Sep 2020 18:02:58 +0200 Message-ID: Subject: Re: oxenstored performance issue when starting VMs in parallel To: Fanny Dwargee Cc: xen-users@lists.xenproject.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" we tested on the latest 4.14, same issue. we tried a oxenstored replacement using lixs : https://github.com/cnplab/li= xs This basically solves the problem, no more 100% CPU (or only a few spikes) , all the VMs are responsive! One problem though, everything works fine except during the "xl destroy", xl is complaining it cannot delete the VIF interface, so there is a VIF leakage which lead, after a few hours / days, to some issue with the dom0 complaining about network interface and has to be rebooted.... So lixs is not a solution and it is no longer in active maintenance/evolution since 4 years. A supported Xen solution/workaround would be better... Jerome Le lun. 21 sept. 2020 =C3=A0 17:25, Fanny Dwargee a = =C3=A9crit : > > > > El lun., 21 sept. 2020 a las 15:10, jerome leseinne () escribi=C3=B3: >> >> Hello, >> >> We are developing a solution based on Xen 4.13 who is constantly >> creating / destroying VMs. >> >> To summarize our lifecycle : >> >> - xl restore vmX >> - xl cd-insert .... >> - We do our stuff for ~ 2 minutes >> - xl destroy vmX >> >> So our VMs have a life of approximately 2 minutes. >> >> The number of VMs we ran in parallel depends on the underlying server. >> >> We are seeing the issue with our larger server who is running 30 VMs >> (HVM) in parallel. >> >> On this server oxenstored is constantly running at 100% cpu usage and >> some VMs are almost stucked or unresponsive. >> >> This is not an hardware issue, 72 xeon cores, 160 GB of memory and >> very fast I/O subsystem. >> Everything else is running smoothly on the server. >> >> what we witness in the xenstore-access.log is that the number of WATCH >> event is matching the number of currently running VMs >> >> so for example for a single WRITE event is followed by around 30 watch e= vents : >> >> [20200918T15:15:18.045Z] A41354 write >> /local/domain/0/backend/qdisk/1311/5632 >> [20200918T15:15:18.046Z] A41248 w event >> backend/qdisk/1311/5632 38ed11d9-9a38-4022-ad75-7c571d4886ed >> [20200918T15:15:18.046Z] A41257 w event >> backend/qdisk/1311/5632 98fa91b8-e88b-4667-9813-d95196257288 >> [20200918T15:15:18.046Z] A40648 w event >> backend/qdisk/1311/5632 e6fd9a35-61ec-4750-93eb-999fb7f662fc >> [20200918T15:15:18.046Z] A40542 w event >> backend/qdisk/1311/5632 6a39c858-2fd4-46e4-a810-485a41328f8c >> [20200918T15:15:18.046Z] A41141 w event >> backend/qdisk/1311/5632 8762d552-b4b4-41ef-a2aa-23700f790ea2 >> [20200918T15:15:18.046Z] A41310 w event >> backend/qdisk/1311/5632 4dc2a9ae-6388-4b0c-9c98-df3c897a832f >> [20200918T15:15:18.046Z] A40660 w event >> backend/qdisk/1311/5632 6abf244d-5939-4540-b176-4ec7d14b392c >> [20200918T15:15:18.046Z] A41347 w event >> backend/qdisk/1311/5632 ecb93157-9929-43e2-8ed4-f5e78ab2f37d >> [20200918T15:15:18.046Z] A41015 w event >> backend/qdisk/1311/5632 a1fec49f-e7cc-4059-87d3-ce43f386746e >> [20200918T15:15:18.046Z] A41167 w event >> backend/qdisk/1311/5632 e9419014-9fd2-47c0-b79d-30f99d9530d6 >> [20200918T15:15:18.046Z] A41100 w event >> backend/qdisk/1311/5632 a2754a91-ecd6-4b6b-87ea-b68db8b888df >> [20200918T15:15:18.046Z] A41147 w event >> backend/qdisk/1311/5632 176a1c3c-add7-4710-a7ee-3b5548d7a56a >> [20200918T15:15:18.046Z] A41305 w event >> backend/qdisk/1311/5632 afe7933b-c92d-4403-8d6c-2e530558c937 >> [20200918T15:15:18.046Z] A40616 w event >> backend/qdisk/1311/5632 35fa45e0-21e8-4666-825b-0c3d629f378d >> [20200918T15:15:18.046Z] A40951 w event >> backend/qdisk/1311/5632 230eb42f-d700-46ce-af61-89242847a978 >> [20200918T15:15:18.046Z] A40567 w event >> backend/qdisk/1311/5632 39cc7ffb-5045-4120-beb7-778073927c93 >> [20200918T15:15:18.046Z] A41363 w event >> backend/qdisk/1311/5632 9e42e74a-80fb-46e8-81f2-718628bf70f6 >> [20200918T15:15:18.046Z] A40740 w event >> backend/qdisk/1311/5632 1a64af31-fee6-45be-b8d8-c98baa5e162f >> [20200918T15:15:18.046Z] A40632 w event >> backend/qdisk/1311/5632 466ef522-cb76-4117-8e93-42471897c353 >> [20200918T15:15:18.046Z] A41319 w event >> backend/qdisk/1311/5632 19ea986b-e303-4180-b833-c691b2b32819 >> [20200918T15:15:18.046Z] A40677 w event >> backend/qdisk/1311/5632 fb01629a-033b-41d6-8349-cec82e570238 >> [20200918T15:15:18.046Z] A41152 w event >> backend/qdisk/1311/5632 84ce9e29-a5cc-42a1-a47b-497b95767885 >> [20200918T15:15:18.047Z] A41233 w event >> backend/qdisk/1311/5632 ea944ad3-3af6-4688-8076-db1eac25d8e9 >> [20200918T15:15:18.047Z] A41069 w event >> backend/qdisk/1311/5632 ce57e169-e1ea-4fb5-b97f-23e651f49d79 >> [20200918T15:15:18.047Z] A41287 w event >> backend/qdisk/1311/5632 d31110c8-ae0b-4b9d-b71f-aa2985addd1a >> [20200918T15:15:18.047Z] A40683 w event >> backend/qdisk/1311/5632 f0e4b0a0-fad0-4bb7-b01e-b8a31107ba3d >> [20200918T15:15:18.047Z] A41177 w event >> backend/qdisk/1311/5632 9ff80e49-4cca-4ec9-901a-d30198104f29 >> [20200918T15:15:18.047Z] D0 w event >> backend/qdisk/1311/5632 FFFFFFFF8276B520 >> [20200918T15:15:18.047Z] A40513 w event >> backend/qdisk/1311/5632 d35a9a42-c15e-492c-a70d-d8b20bafec8f >> [20200918T15:15:18.047Z] A41354 w event >> backend/qdisk/1311/5632 e4456ca4-70f4-4afc-9ba1-4a1cfd74c8e6 >> >> We are not sure this is the root cause of the issue but this is the >> only real difference we can see in the log. >> >> We don't understand why the number of WATCH events is related to the >> number of concurrent running VM. >> A watch event should be registered and only fired for the current >> domain ID, so a write for a specific node path should only trigger one >> watch event and not 30 in our case. >> >> Any ideas / comments ? >> >> Thanks >> >> Jerome Leseinne >> > > Jerome, > we are experiencing very similar issues in Xen v4.12.3 (Debian 10.4) with= a similar setup (128GB RAM, 48 cores), in our case we start and stop dozen= s of HVM VMs in parallel using restore from a memory saved file and analyzi= ng automatically a software behaviour inside the guest during a few minutes= . > > Any ideas/comments for improving the oxenstore performance will be very w= elcome. > From xen-users-bounces@lists.xenproject.org Mon Sep 21 16:41:59 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 21 Sep 2020 16:41:59 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKOrs-0004Ku-TM; Mon, 21 Sep 2020 16:40:44 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKOrr-0004Kp-P6 for xen-users@lists.xenproject.org; Mon, 21 Sep 2020 16:40:43 +0000 X-Inumbo-ID: 3af5dfa1-73c2-45b0-8625-0ca50aafe041 Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 3af5dfa1-73c2-45b0-8625-0ca50aafe041; Mon, 21 Sep 2020 16:40:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:References:To:Subject; bh=P4VV2PIR1h+cjKNKVRwRqa/ZxP0y/gsTtMnSqCqSDkY=; b=wmQsgtfKqEMS26f58nozJHvD8m LRrXeTqSPPPodXlIyfOhXGn85WUzlBicgOjMjemn7kcISWFRs1O8pa1AmZBY/2wX2r25yQqz3XEKd 64JHUl0iqxW4APRuw3PtZk/+cFminc99OvgfI0QTA3lpsmtQMVN8nXrL0n5/b65gLNjk=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKOrq-0006N9-9d; Mon, 21 Sep 2020 16:40:42 +0000 Received: from [54.239.6.186] (helo=a483e7b01a66.ant.amazon.com) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1kKOrp-0003Ss-UM; Mon, 21 Sep 2020 16:40:42 +0000 Subject: Re: oxenstored performance issue when starting VMs in parallel To: jerome leseinne , xen-users@lists.xenproject.org, 'Edwin Torok' References: From: Julien Grall Message-ID: Date: Mon, 21 Sep 2020 17:40:40 +0100 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" On 21/09/2020 14:05, jerome leseinne wrote: > Hello, Hello, I am only CCing Edwin who is working on OXenStored. Hopefully, he will be able to give you some pointers. > We are developing a solution based on Xen 4.13 who is constantly > creating / destroying VMs. > > To summarize our lifecycle : > > - xl restore vmX > - xl cd-insert .... > - We do our stuff for ~ 2 minutes > - xl destroy vmX > > So our VMs have a life of approximately 2 minutes. > > The number of VMs we ran in parallel depends on the underlying server. > > We are seeing the issue with our larger server who is running 30 VMs > (HVM) in parallel. > > On this server oxenstored is constantly running at 100% cpu usage and > some VMs are almost stucked or unresponsive. > > This is not an hardware issue, 72 xeon cores, 160 GB of memory and > very fast I/O subsystem. > Everything else is running smoothly on the server. > > what we witness in the xenstore-access.log is that the number of WATCH > event is matching the number of currently running VMs > > so for example for a single WRITE event is followed by around 30 watch events : > > [20200918T15:15:18.045Z] A41354 write > /local/domain/0/backend/qdisk/1311/5632 > [20200918T15:15:18.046Z] A41248 w event > backend/qdisk/1311/5632 38ed11d9-9a38-4022-ad75-7c571d4886ed > [20200918T15:15:18.046Z] A41257 w event > backend/qdisk/1311/5632 98fa91b8-e88b-4667-9813-d95196257288 > [20200918T15:15:18.046Z] A40648 w event > backend/qdisk/1311/5632 e6fd9a35-61ec-4750-93eb-999fb7f662fc > [20200918T15:15:18.046Z] A40542 w event > backend/qdisk/1311/5632 6a39c858-2fd4-46e4-a810-485a41328f8c > [20200918T15:15:18.046Z] A41141 w event > backend/qdisk/1311/5632 8762d552-b4b4-41ef-a2aa-23700f790ea2 > [20200918T15:15:18.046Z] A41310 w event > backend/qdisk/1311/5632 4dc2a9ae-6388-4b0c-9c98-df3c897a832f > [20200918T15:15:18.046Z] A40660 w event > backend/qdisk/1311/5632 6abf244d-5939-4540-b176-4ec7d14b392c > [20200918T15:15:18.046Z] A41347 w event > backend/qdisk/1311/5632 ecb93157-9929-43e2-8ed4-f5e78ab2f37d > [20200918T15:15:18.046Z] A41015 w event > backend/qdisk/1311/5632 a1fec49f-e7cc-4059-87d3-ce43f386746e > [20200918T15:15:18.046Z] A41167 w event > backend/qdisk/1311/5632 e9419014-9fd2-47c0-b79d-30f99d9530d6 > [20200918T15:15:18.046Z] A41100 w event > backend/qdisk/1311/5632 a2754a91-ecd6-4b6b-87ea-b68db8b888df > [20200918T15:15:18.046Z] A41147 w event > backend/qdisk/1311/5632 176a1c3c-add7-4710-a7ee-3b5548d7a56a > [20200918T15:15:18.046Z] A41305 w event > backend/qdisk/1311/5632 afe7933b-c92d-4403-8d6c-2e530558c937 > [20200918T15:15:18.046Z] A40616 w event > backend/qdisk/1311/5632 35fa45e0-21e8-4666-825b-0c3d629f378d > [20200918T15:15:18.046Z] A40951 w event > backend/qdisk/1311/5632 230eb42f-d700-46ce-af61-89242847a978 > [20200918T15:15:18.046Z] A40567 w event > backend/qdisk/1311/5632 39cc7ffb-5045-4120-beb7-778073927c93 > [20200918T15:15:18.046Z] A41363 w event > backend/qdisk/1311/5632 9e42e74a-80fb-46e8-81f2-718628bf70f6 > [20200918T15:15:18.046Z] A40740 w event > backend/qdisk/1311/5632 1a64af31-fee6-45be-b8d8-c98baa5e162f > [20200918T15:15:18.046Z] A40632 w event > backend/qdisk/1311/5632 466ef522-cb76-4117-8e93-42471897c353 > [20200918T15:15:18.046Z] A41319 w event > backend/qdisk/1311/5632 19ea986b-e303-4180-b833-c691b2b32819 > [20200918T15:15:18.046Z] A40677 w event > backend/qdisk/1311/5632 fb01629a-033b-41d6-8349-cec82e570238 > [20200918T15:15:18.046Z] A41152 w event > backend/qdisk/1311/5632 84ce9e29-a5cc-42a1-a47b-497b95767885 > [20200918T15:15:18.047Z] A41233 w event > backend/qdisk/1311/5632 ea944ad3-3af6-4688-8076-db1eac25d8e9 > [20200918T15:15:18.047Z] A41069 w event > backend/qdisk/1311/5632 ce57e169-e1ea-4fb5-b97f-23e651f49d79 > [20200918T15:15:18.047Z] A41287 w event > backend/qdisk/1311/5632 d31110c8-ae0b-4b9d-b71f-aa2985addd1a > [20200918T15:15:18.047Z] A40683 w event > backend/qdisk/1311/5632 f0e4b0a0-fad0-4bb7-b01e-b8a31107ba3d > [20200918T15:15:18.047Z] A41177 w event > backend/qdisk/1311/5632 9ff80e49-4cca-4ec9-901a-d30198104f29 > [20200918T15:15:18.047Z] D0 w event > backend/qdisk/1311/5632 FFFFFFFF8276B520 > [20200918T15:15:18.047Z] A40513 w event > backend/qdisk/1311/5632 d35a9a42-c15e-492c-a70d-d8b20bafec8f > [20200918T15:15:18.047Z] A41354 w event > backend/qdisk/1311/5632 e4456ca4-70f4-4afc-9ba1-4a1cfd74c8e6 > > We are not sure this is the root cause of the issue but this is the > only real difference we can see in the log. > > We don't understand why the number of WATCH events is related to the > number of concurrent running VM. > A watch event should be registered and only fired for the current > domain ID, so a write for a specific node path should only trigger one > watch event and not 30 in our case. > > Any ideas / comments ? Cheers, -- Julien Grall From xen-users-bounces@lists.xenproject.org Mon Sep 21 20:04:24 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 21 Sep 2020 20:04:24 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKS1t-0006iw-BJ; Mon, 21 Sep 2020 20:03:17 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKP7z-0005Y3-Nb for xen-users@lists.xenproject.org; Mon, 21 Sep 2020 16:57:23 +0000 X-Inumbo-ID: 8503f840-cf73-4520-b9b7-cf1fef6b50ed Received: from esa6.hc3370-68.iphmx.com (unknown [216.71.155.175]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 8503f840-cf73-4520-b9b7-cf1fef6b50ed; Mon, 21 Sep 2020 16:57:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=citrix.com; s=securemail; t=1600707442; h=from:to:subject:date:message-id:references:in-reply-to: 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Subject: Re: oxenstored performance issue when starting VMs in parallel Thread-Topic: oxenstored performance issue when starting VMs in parallel Thread-Index: AQHWkDX0aRoo6zkA/E+panOpiMw6qalzLpQA Date: Mon, 21 Sep 2020 16:57:18 +0000 Message-ID: <46f1f50dc02c53391958d9d4bb5fc57d23ba6ede.camel@citrix.com> References: In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-Mailman-Approved-At: Mon, 21 Sep 2020 20:03:16 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" 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Delivery-date: Mon, 21 Sep 2020 20:04:24 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKS1l-0006ie-VA; Mon, 21 Sep 2020 20:03:09 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKLjB-0000t1-Vg for xen-users@lists.xenproject.org; Mon, 21 Sep 2020 13:19:34 +0000 X-Inumbo-ID: 4007e7ca-289c-4eb4-9011-380711c4a40b Received: from mailout10.t-online.de (unknown [194.25.134.21]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 4007e7ca-289c-4eb4-9011-380711c4a40b; Mon, 21 Sep 2020 13:19:31 +0000 (UTC) Received: from fwd29.aul.t-online.de (fwd29.aul.t-online.de [172.20.26.134]) by mailout10.t-online.de (Postfix) with SMTP id 0C45E4157184 for ; Mon, 21 Sep 2020 15:19:31 +0200 (CEST) Received: from [192.168.178.41] (VOqA82ZEghlrHN3D1ice644vuHQ-3KXJ2SVXsG-kGYeHDxJHeZagnh9wJipN5CkgNq@[79.226.47.41]) by fwd29.t-online.de with (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384 encrypted) esmtp id 1kKLj7-0k1UVk0; Mon, 21 Sep 2020 15:19:29 +0200 X-Mozilla-News-Host: news://news.gmane.org:119 From: Ralf Lehmeier Subject: Problems with the installation of XEN 4.14 To: xen-users@lists.xenproject.org Message-ID: <897641ac-9ab0-1b01-27ec-35e0807bd907@t-online.de> Date: Mon, 21 Sep 2020 15:19:28 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0 SeaMonkey/2.53.3 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ID: VOqA82ZEghlrHN3D1ice644vuHQ-3KXJ2SVXsG-kGYeHDxJHeZagnh9wJipN5CkgNq X-TOI-EXPURGATEID: 150726::1600694369-0000FF93-D68165BE/0/0 CLEAN NORMAL X-TOI-MSGID: c09d36f5-b155-4fd9-b0cf-d6f55bd21c16 X-Mailman-Approved-At: Mon, 21 Sep 2020 20:03:08 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" I wanted to install XEN under Manajaro from the AUR and so far I got 2 problems 1. I had to import the key separately, otherwise I got an error message and 2. the message : " ... config.status: linking ./mpn/generic/addsub_n.c to mpn/addsub_n.c config.status: linking ./mpn/x86_64/addaddmul_1msb0.asm to mpn/addaddmul_1msb0.asm config.status: linking ./mpn/x86_64/gmp-mparam.h to gmp-mparam.h sed -i 's/#define HAVE_OBSTACK_VPRINTF 1/\/\/#define HAVE_OBSTACK_VPRINTF 1/' gmp-x86_64/config.h touch gmp-x86_64 make[1]: directory "/tmp/trizen-ralf/xen/src/xen-4.14.0/stubdom" is left make: *** [Makefile:138: install-stubdom] Error 2 ==> ERROR: An error occurred in build(). Abort... :: Unable to build xen - makepkg exited with code: 4". now I would like to know how I can get Xen to run anyway. With kind regards R.Lehmeier From xen-users-bounces@lists.xenproject.org Tue Sep 22 13:18:58 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Tue, 22 Sep 2020 13:18:58 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiAV-0007ox-Cc; Tue, 22 Sep 2020 13:17:15 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiAU-0007os-D6 for xen-users@lists.xenproject.org; Tue, 22 Sep 2020 13:17:14 +0000 X-Inumbo-ID: 3036b7d5-949f-48ca-8b82-e53f1802880f Received: from mail-ej1-x62b.google.com (unknown [2a00:1450:4864:20::62b]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 3036b7d5-949f-48ca-8b82-e53f1802880f; Tue, 22 Sep 2020 13:17:12 +0000 (UTC) Received: by mail-ej1-x62b.google.com with SMTP id o8so22793240ejb.10 for ; Tue, 22 Sep 2020 06:17:12 -0700 (PDT) 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 :cc:content-transfer-encoding; bh=YXzLHS22N3RqI6dRshsr7wbAMdb+OJPEET9TpXX5vww=; b=l5QtaP2fjLrByqvDpcnY9ZoiQie7d5QA9jOP3eqZCnxwEtdDdTavdhWPIAzOygFFTI l4bb8DN6uG+yIDjlPrY8rzRMn8udIX9QXvsQujbe2VOT9MjqsKP/kTWO5pikMmiQCj0/ TsDBF0eaQePKnLFM7dbYgDT73GISn+SawiTbBrLhnm3cSVv5Of3izoyAx6e5CJAMgzkR b0BOphM+Er+zDKVkyYQFbqcPXQViNMl7ZmzPsQWJ+7NzTrB8AYubSCWSm9ihkgze4ech Y9/ZTf39/g2SRS6gqpc4B2LZzuLm3drG65zLTG/u9Uu8xNFnIjLVFfQy/aYWmzHtHAXc VU9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=YXzLHS22N3RqI6dRshsr7wbAMdb+OJPEET9TpXX5vww=; b=YiYAdd7gjtFbY2wEz203eNBXYsHEc7A+0OuNI9SvQrT4Nj/zfyxc5KE+UuGc8ZaiKM O9YqXnA2baS3+1CiYF5v9+W4kdy7qauSn1OA9wQA4BMMayaREjtMJLpCN4DzNLLKZSWc 4fMMkDLVihSazqkwX8bVn1PhzSCGWcegr2qIC3Gssz+f9OSS5JG9MUo4xOAaR0LmcaF0 YIV937+bIpAZeahztr3bejKoKj7O4EP6ipZC8x2UqRDbmGpGJHJMRkcYGhppVXXIlaYK xeIJiK5hCf+83s+YJOn2YEYbdDE3MjHfToAeksqSMDNPbDbx4wdVVfhFYnplGIRooIrC 8SrA== X-Gm-Message-State: AOAM531s09a6fLAuGwEvIpEF0yo4WeX4xCWKwjCu4GbGTJsh4e3CJTLt 4YG0PcmGAhhH3I/lz/BTWWK+UM13OmFifdzaLhI= X-Google-Smtp-Source: ABdhPJwltX0Podf8pMvhsBWnSKk5l5BOKEW/hgZw/xJAd+5ViGvFS5p6X63fpvgfXQKFA+e6u7Xar71s93vkKwi+2+0= X-Received: by 2002:a17:906:cc8d:: with SMTP id oq13mr4837106ejb.280.1600780631549; Tue, 22 Sep 2020 06:17:11 -0700 (PDT) MIME-Version: 1.0 References: <46f1f50dc02c53391958d9d4bb5fc57d23ba6ede.camel@citrix.com> In-Reply-To: <46f1f50dc02c53391958d9d4bb5fc57d23ba6ede.camel@citrix.com> From: jerome leseinne Date: Tue, 22 Sep 2020 15:17:00 +0200 Message-ID: Subject: Re: oxenstored performance issue when starting VMs in parallel To: Edwin Torok Cc: "xen-users@lists.xenproject.org" , "julien@xen.org" Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" Hi, Edwin you rock ! This call in qemu is effectively the culprit ! I have disabled this xen_bus_add_watch call and re-run test on our big serv= er: - oxenstored is now between 10% to 20% CPU usage (previously was 100% all the time) - All our VMs are responsive - All our VM start in less than 10 seconds (before the fix some VMs could take more than one minute to be fully up - Dom0 is more responsive Disabling the watch may not be the ideal solution ( I let the qemu experts answer this and the possible side effects), but in our scenario and usage this fixes the problem and dramatically boosts the performance. So far we haven't seen any side effect, all the xl orders are ok, the VMs are fully functional, no devices leak (like network vif for exemple) and once all the VMs are down a call to xenstore-ls show that the store is indeed empty (dom0 excluded) We will continue additional testing and stress but in all cases a huge thanks to you and Julien for your help on this issue ! Jerome Le lun. 21 sept. 2020 =C3=A0 18:57, Edwin Torok a = =C3=A9crit : > > On Mon, 2020-09-21 at 17:40 +0100, Julien Grall wrote: > > [CAUTION - EXTERNAL EMAIL] DO NOT reply, click links, or open > > attachments unless you have verified the sender and know the content > > is safe. > > > > On 21/09/2020 14:05, jerome leseinne wrote: > > > Hello, > > > > Hello, > > > > I am only CCing Edwin who is working on OXenStored. Hopefully, he > > will > > be able to give you some pointers. > > > > > We are developing a solution based on Xen 4.13 who is constantly > > > creating / destroying VMs. > > > > > > To summarize our lifecycle : > > > > > > - xl restore vmX > > > - xl cd-insert .... > > > - We do our stuff for ~ 2 minutes > > > - xl destroy vmX > > > > > > So our VMs have a life of approximately 2 minutes. > > > > > > The number of VMs we ran in parallel depends on the underlying > > > server. > > > > > > We are seeing the issue with our larger server who is running 30 > > > VMs > > > (HVM) in parallel. > > > > > > On this server oxenstored is constantly running at 100% cpu usage > > > and > > > some VMs are almost stucked or unresponsive. > > > > > > This is not an hardware issue, 72 xeon cores, 160 GB of memory and > > > very fast I/O subsystem. > > > Everything else is running smoothly on the server. > > > > > > what we witness in the xenstore-access.log is that the number of > > > WATCH > > > event is matching the number of currently running VMs > > > > > > so for example for a single WRITE event is followed by around 30 > > > watch events : > > > > > > [20200918T15:15:18.045Z] A41354 write > > > /local/domain/0/backend/qdisk/1311/5632 > > > [20200918T15:15:18.046Z] A41248 w event > > > backend/qdisk/1311/5632 38ed11d9-9a38-4022-ad75-7c571d4886ed > > > [20200918T15:15:18.046Z] A41257 w event > > > backend/qdisk/1311/5632 98fa91b8-e88b-4667-9813-d95196257288 > > > [20200918T15:15:18.046Z] A40648 w event > > > backend/qdisk/1311/5632 e6fd9a35-61ec-4750-93eb-999fb7f662fc > > > [20200918T15:15:18.046Z] A40542 w event > > Hi, > > All the A here point to another unix domain socket. They have all > registered a watch on this key (or a parent). > > To find out what key they are watching you can look for the watch > registration: > grep 'A41248 .*watch' /var/log/xenstored-access.log > > You can find out all xenstore clients connected to oxenstored, find all > the numbers in the port column here: > ss -a --unix -p|grep xenstored > Then look up those numbers, e.g. assuming you see 22269: > ss -a --unix -p|grep 22269 > > This should tell you what the processes are. > > I have a suspicion that it is related to this code in qemu: > > xenbus->backend_watch =3D > xen_bus_add_watch(xenbus, "", /* domain root node */ > "backend", xen_bus_backend_changed, > &local_err); > > If I read the code right this seems to set up a watch on > /local/domain/0/backend, so if you have N qemus running (one for each > disk) then you get N^2 watch events fired in total. > > Best regards, > --Edwin > > > > backend/qdisk/1311/5632 6a39c858-2fd4-46e4-a810-485a41328f8c > > > [20200918T15:15:18.046Z] A41141 w event > > > backend/qdisk/1311/5632 8762d552-b4b4-41ef-a2aa-23700f790ea2 > > > [20200918T15:15:18.046Z] A41310 w event > > > backend/qdisk/1311/5632 4dc2a9ae-6388-4b0c-9c98-df3c897a832f > > > [20200918T15:15:18.046Z] A40660 w event > > > backend/qdisk/1311/5632 6abf244d-5939-4540-b176-4ec7d14b392c > > > [20200918T15:15:18.046Z] A41347 w event > > > backend/qdisk/1311/5632 ecb93157-9929-43e2-8ed4-f5e78ab2f37d > > > [20200918T15:15:18.046Z] A41015 w event > > > backend/qdisk/1311/5632 a1fec49f-e7cc-4059-87d3-ce43f386746e > > > [20200918T15:15:18.046Z] A41167 w event > > > backend/qdisk/1311/5632 e9419014-9fd2-47c0-b79d-30f99d9530d6 > > > [20200918T15:15:18.046Z] A41100 w event > > > backend/qdisk/1311/5632 a2754a91-ecd6-4b6b-87ea-b68db8b888df > > > [20200918T15:15:18.046Z] A41147 w event > > > backend/qdisk/1311/5632 176a1c3c-add7-4710-a7ee-3b5548d7a56a > > > [20200918T15:15:18.046Z] A41305 w event > > > backend/qdisk/1311/5632 afe7933b-c92d-4403-8d6c-2e530558c937 > > > [20200918T15:15:18.046Z] A40616 w event > > > backend/qdisk/1311/5632 35fa45e0-21e8-4666-825b-0c3d629f378d > > > [20200918T15:15:18.046Z] A40951 w event > > > backend/qdisk/1311/5632 230eb42f-d700-46ce-af61-89242847a978 > > > [20200918T15:15:18.046Z] A40567 w event > > > backend/qdisk/1311/5632 39cc7ffb-5045-4120-beb7-778073927c93 > > > [20200918T15:15:18.046Z] A41363 w event > > > backend/qdisk/1311/5632 9e42e74a-80fb-46e8-81f2-718628bf70f6 > > > [20200918T15:15:18.046Z] A40740 w event > > > backend/qdisk/1311/5632 1a64af31-fee6-45be-b8d8-c98baa5e162f > > > [20200918T15:15:18.046Z] A40632 w event > > > backend/qdisk/1311/5632 466ef522-cb76-4117-8e93-42471897c353 > > > [20200918T15:15:18.046Z] A41319 w event > > > backend/qdisk/1311/5632 19ea986b-e303-4180-b833-c691b2b32819 > > > [20200918T15:15:18.046Z] A40677 w event > > > backend/qdisk/1311/5632 fb01629a-033b-41d6-8349-cec82e570238 > > > [20200918T15:15:18.046Z] A41152 w event > > > backend/qdisk/1311/5632 84ce9e29-a5cc-42a1-a47b-497b95767885 > > > [20200918T15:15:18.047Z] A41233 w event > > > backend/qdisk/1311/5632 ea944ad3-3af6-4688-8076-db1eac25d8e9 > > > [20200918T15:15:18.047Z] A41069 w event > > > backend/qdisk/1311/5632 ce57e169-e1ea-4fb5-b97f-23e651f49d79 > > > [20200918T15:15:18.047Z] A41287 w event > > > backend/qdisk/1311/5632 d31110c8-ae0b-4b9d-b71f-aa2985addd1a > > > [20200918T15:15:18.047Z] A40683 w event > > > backend/qdisk/1311/5632 f0e4b0a0-fad0-4bb7-b01e-b8a31107ba3d > > > [20200918T15:15:18.047Z] A41177 w event > > > backend/qdisk/1311/5632 9ff80e49-4cca-4ec9-901a-d30198104f29 > > > [20200918T15:15:18.047Z] D0 w event > > > backend/qdisk/1311/5632 FFFFFFFF8276B520 > > > [20200918T15:15:18.047Z] A40513 w event > > > backend/qdisk/1311/5632 d35a9a42-c15e-492c-a70d-d8b20bafec8f > > > [20200918T15:15:18.047Z] A41354 w event > > > backend/qdisk/1311/5632 e4456ca4-70f4-4afc-9ba1-4a1cfd74c8e6 > > > > > > We are not sure this is the root cause of the issue but this is the > > > only real difference we can see in the log. > > > > > > We don't understand why the number of WATCH events is related to > > > the > > > number of concurrent running VM. > > > A watch event should be registered and only fired for the current > > > domain ID, so a write for a specific node path should only trigger > > > one > > > watch event and not 30 in our case. > > > > > > Any ideas / comments ? > > > > Cheers, > > From xen-users-bounces@lists.xenproject.org Tue Sep 22 13:38:43 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Tue, 22 Sep 2020 13:38:43 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiUE-0001lg-DW; Tue, 22 Sep 2020 13:37:38 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiUC-0001gh-Gs for xen-users@lists.xen.org; Tue, 22 Sep 2020 13:37:36 +0000 X-Inumbo-ID: a84a11f0-876e-431b-9d98-2d509504715f Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id a84a11f0-876e-431b-9d98-2d509504715f; Tue, 22 Sep 2020 13:37:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Date:Message-Id:Subject:CC:From:To:MIME-Version: Content-Transfer-Encoding:Content-Type; bh=c6RX2Eh49YE7OXM04xyXFpYd39JbxFOoTIStedBMvL8=; b=rM6xd5wRjGqlRV/jEulI4YD5Lu 42Vf+LRsF2W7mjTgLVmHwGQ1cYiUcH09sdB+hsIVjzuCHvpWHwiLfxULIwAp4lW7WHY6B77tCW/eR noNMrDMJ8lBJdW+HjU3rfgXy7Yktlan5Ss7tWjYbGF+1KOqxb5k1WUPRa211QWBfXH5I=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiTr-0006ox-1Y; Tue, 22 Sep 2020 13:37:15 +0000 Received: from iwj by xenbits.xenproject.org with local (Exim 4.92) (envelope-from ) id 1kKiTq-0002Hq-W9; Tue, 22 Sep 2020 13:37:14 +0000 Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team CC: Xen.org security team Subject: Xen Security Advisory 334 v3 (CVE-2020-25598) - Missing unlock in XENMEM_acquire_resource error path Message-Id: Date: Tue, 22 Sep 2020 13:37:14 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Xen Security Advisory CVE-2020-25598 / XSA-334 version 3 Missing unlock in XENMEM_acquire_resource error path UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= The RCU (Read, Copy, Update) mechanism is a synchronisation primitive. A buggy error path in the XENMEM_acquire_resource exits without releasing an RCU reference, which is conceptually similar to forgetting to unlock a spinlock. IMPACT ====== A buggy or malicious HVM stubdomain can cause an RCU reference to be leaked. This causes subsequent administration operations, (e.g. CPU offline) to livelock, resulting in a host Denial of Service. VULNERABLE SYSTEMS ================== The buggy codepath has been present since Xen 4.12. Xen 4.14 and later are vulnerable to the DoS. The side effects are believed to be benign on Xen 4.12 and 4.13, but patches are provided nevertheless. The vulnerability can generally only be exploited by x86 HVM VMs, as these are generally the only type of VM which have a Qemu stubdomain. x86 PV and PVH domains, as well as ARM VMs typically don't use a stubdomain. Only VMs using HVM stubdomains can exploit the vulnerability. VMs using PV stubdomains, or with emulators running in dom0 cannot exploit the vulnerability. MITIGATION ========== Running only x86 PV or PVH VMs will avoid the vulnerability. Reconfiguring x86 HVM guests to use a PV or no stubdom will also avoid the vulnerability. CREDITS ======= This issue was discovered by Andrew Cooper of Citrix. RESOLUTION ========== Applying the appropriate attached patch resolves this issue. Note that patches for released versions are generally prepared to apply to the stable branches, and may not apply cleanly to the most recent release tarball. Downstreams are encouraged to update to the tip of the stable branch before applying these patches. xsa334.patch Xen 4.13 - xen-unstable xsa334-4.12.patch Xen 4.12 $ sha256sum xsa334* 80e7725a56c4244d860e9aebb56710a8165f7ffeae3fb67365cbc85b3b0518b3 xsa334.meta 323cd9d24b2e95643833865a9943172c56edd25dfd170e4741034d28dfd0d4bd xsa334.patch 85341ba6322ea6279c0851493ce61e822c8560850034f5f26cbcb26be85ca102 xsa334-4.12.patch $ DEPLOYMENT DURING EMBARGO ========================= Deployment of the patches and/or mitigations described above (or others which are substantially similar) is permitted during the embargo, even on public-facing systems with untrusted guest users and administrators. But: Distribution of updated software is prohibited (except to other members of the predisclosure list). Predisclosure list members who wish to deploy significantly different patches and/or mitigations, please contact the Xen Project Security Team. (Note: this during-embargo deployment notice is retained in post-embargo publicly released Xen Project advisories, even though it is then no longer applicable. This is to enable the community to have oversight of the Xen Project Security Team's decisionmaking.) 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Tue, 22 Sep 2020 13:37:27 +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 4.92) (envelope-from ) id 1kKiU2-0001gf-7j for xen-users@lists.xen.org; Tue, 22 Sep 2020 13:37:26 +0000 X-Inumbo-ID: dcb14a4f-30c8-490d-b16c-ef647f6b43a5 Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id dcb14a4f-30c8-490d-b16c-ef647f6b43a5; Tue, 22 Sep 2020 13:37:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Date:Message-Id:Subject:CC:From:To:MIME-Version: Content-Transfer-Encoding:Content-Type; bh=BxNezBWGti6nsU94q+z58yWcVgKhlmyDeek0n1noYmg=; b=AbXMDa10H2scOBE7v+BUG8qPZO EQIea4geLLcicDhM+8VSUWpEgQb/LUiAhCVDUu2yEH+qevBtKnMl5qu7BaRJIxRQ+XTwyLgt3rSkh PjpH/9x3XHewqW+8eCojnnq5O3+ryts+046dc72rouw8ZbWaKmcHjYCzfMaW7ifnH8qg=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiTq-0006ot-BP; Tue, 22 Sep 2020 13:37:14 +0000 Received: from iwj by xenbits.xenproject.org with local (Exim 4.92) (envelope-from ) id 1kKiTq-0002Gr-8r; Tue, 22 Sep 2020 13:37:14 +0000 Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team CC: Xen.org security team Subject: Xen Security Advisory 333 v3 (CVE-2020-25602) - x86 pv: Crash when handling guest access to MSR_MISC_ENABLE Message-Id: Date: Tue, 22 Sep 2020 13:37:14 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Xen Security Advisory CVE-2020-25602 / XSA-333 version 3 x86 pv: Crash when handling guest access to MSR_MISC_ENABLE UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= When a guest accesses certain Model Specific Registers, Xen first reads the value from hardware to use as the basis for auditing the guest access. For the MISC_ENABLE MSR, which is an Intel specific MSR, this MSR read is performed without error handling for a #GP fault, which is the consequence of trying to read this MSR on non-Intel hardware. IMPACT ====== A buggy or malicious PV guest administrator can crash Xen, resulting in a host Denial of Service. VULNERABLE SYSTEMS ================== Only x86 systems are vulnerable. ARM systems are not vulnerable. Only Xen versions 4.11 and onwards are vulnerable. 4.10 and earlier are not vulnerable. Only x86 systems which do not implement the MISC_ENABLE MSR (0x1a0) are vulnerable. AMD and Hygon systems do not implement this MSR and are vulnerable. Intel systems do implement this MSR and are not vulnerable. Other manufacturers have not been checked. Only x86 PV guests can exploit the vulnerability. x86 HVM/PVH guests cannot exploit the vulnerability. MITIGATION ========== Running only HVM/PVH guests avoids the vulnerability. CREDITS ======= This issue was discovered by Andrew Cooper of Citrix. RESOLUTION ========== Applying the attached patch resolves this issue. Note that patches for released versions are generally prepared to apply to the stable branches, and may not apply cleanly to the most recent release tarball. Downstreams are encouraged to update to the tip of the stable branch before applying these patches. xsa333.patch Xen 4.11 - xen-unstable $ sha256sum xsa333* 3f3d974ede9fe80f4eb63640dce058cf9e2073cd79e4c085c944f3ca5e454e26 xsa333.meta 8edec914fbdf036fba8cb54a75d3a9b025fac936e0af35512954a2dc2b12a26f xsa333.patch $ DEPLOYMENT DURING EMBARGO ========================= Deployment of the patches and/or mitigations described above (or others which are substantially similar) is permitted during the embargo, even on public-facing systems with untrusted guest users and administrators. But: Distribution of updated software is prohibited (except to other members of the predisclosure list). Predisclosure list members who wish to deploy significantly different patches and/or mitigations, please contact the Xen Project Security Team. (Note: this during-embargo deployment notice is retained in post-embargo publicly released Xen Project advisories, even though it is then no longer applicable. This is to enable the community to have oversight of the Xen Project Security Team's decisionmaking.) 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Tue, 22 Sep 2020 13:37:48 +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 4.92) (envelope-from ) id 1kKiUM-0001gf-7v for xen-users@lists.xen.org; Tue, 22 Sep 2020 13:37:46 +0000 X-Inumbo-ID: 3dd34aa5-cfdb-481b-a354-6bc891271e7b Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 3dd34aa5-cfdb-481b-a354-6bc891271e7b; Tue, 22 Sep 2020 13:37:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Date:Message-Id:Subject:CC:From:To:MIME-Version: Content-Transfer-Encoding:Content-Type; bh=gP0z4GQKK0DBHV6xyPcPidrYqBmgOn41Y/H4SIQLckQ=; b=WndxGrN3ol1mkZMe0bSzdnzY0r CwrtKOTJuuJ/MHXJhk3uL+IXYj/vGvv8nLHHmGVkKdIFh8ujODGDErxHSO5r3v07cdyoN87RjxqIX MocXkTiXXlsqHCQjQMTzUyINuesRpBzwIxSzej63QwE88duF1rcHpF2w8m7Xte+iX3To=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiTr-0006p5-L8; Tue, 22 Sep 2020 13:37:15 +0000 Received: from iwj by xenbits.xenproject.org with local (Exim 4.92) (envelope-from ) id 1kKiTr-0002Ip-K6; Tue, 22 Sep 2020 13:37:15 +0000 Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team CC: Xen.org security team Subject: Xen Security Advisory 336 v3 (CVE-2020-25604) - race when migrating timers between x86 HVM vCPU-s Message-Id: Date: Tue, 22 Sep 2020 13:37:15 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Xen Security Advisory CVE-2020-25604 / XSA-336 version 3 race when migrating timers between x86 HVM vCPU-s UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= When migrating timers of x86 HVM guests between its vCPU-s, the locking model used allows for a second vCPU of the same guest also operating on the timers to release a lock that it didn't acquire. IMPACT ====== The most likely effect of the issue is a hang or crash of the hypervisor, i.e. a Denial of Service (DoS). VULNERABLE SYSTEMS ================== All versions of Xen are affected. Only x86 systems are vulnerable. Arm systems are not vulnerable. Only x86 HVM guests can leverage the vulnerability. x86 PV and PVH cannot leverage the vulnerability. Only guests with more than one vCPU can exploit the vulnerability. MITIGATION ========== Running only PV and PVH guests will avoid the vulnerability. CREDITS ======= This issue was discovered by Igor Druzhinin of Citrix. RESOLUTION ========== Applying the appropriate attached patch resolves this issue. Note that patches for released versions are generally prepared to apply to the stable branches, and may not apply cleanly to the most recent release tarball. Downstreams are encouraged to update to the tip of the stable branch before applying these patches. xsa336.patch Xen 4.12 - xen-unstable xsa336-4.11.patch Xen 4.10 - 4.11 $ sha256sum xsa336* 6cb13a54c2b0fcb6948a1c4045095da4e43aad262a1dd8993ea2a3bd90d4c72d xsa336.meta ecb59876fb92cfe0916ed5f3227a30efe038224c1f6ec36bc3706c4e2214552c xsa336.patch c0c7983bfd70eb54277af9fddfcc3cc95bbd745d92d9ffb71d5b32281c437510 xsa336-4.11.patch $ DEPLOYMENT DURING EMBARGO ========================= Deployment of the patches and/or mitigations described above (or others which are substantially similar) is permitted during the embargo, even on public-facing systems with untrusted guest users and administrators. But: Distribution of updated software is prohibited (except to other members of the predisclosure list). Predisclosure list members who wish to deploy significantly different patches and/or mitigations, please contact the Xen Project Security Team. (Note: this during-embargo deployment notice is retained in post-embargo publicly released Xen Project advisories, even though it is then no longer applicable. This is to enable the community to have oversight of the Xen Project Security Team's decisionmaking.) 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with esmtp (Exim 4.92) (envelope-from ) id 1kKiUg-0001gf-95 for xen-users@lists.xen.org; Tue, 22 Sep 2020 13:38:06 +0000 X-Inumbo-ID: 6b92994e-52f4-4d9e-8f31-d6171dba0445 Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 6b92994e-52f4-4d9e-8f31-d6171dba0445; Tue, 22 Sep 2020 13:37:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Date:Message-Id:Subject:CC:From:To:MIME-Version: Content-Transfer-Encoding:Content-Type; bh=+isba2oHNxAWLTpZElUcuF2o8dNqyf/0jqJsIMihQxY=; b=tsEwmKd10jaIOU41xIXoOT+L2c M9WfC9LIqco/Hd+RGv5X7Y6OV9Q2dhyEoI7elXcNbW/Zpm8Xcrz+PGQtc630Hb8REhaP7QW0XRjGO S3x/bW7vJUwzAQnrcBJiMxpNmYbC1Hes0XPkwYtqKzOnrbDA5w0s26qlxgKCylLY4JpU=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiTs-0006pV-VN; Tue, 22 Sep 2020 13:37:16 +0000 Received: from iwj by xenbits.xenproject.org with local (Exim 4.92) (envelope-from ) id 1kKiTs-0002Kw-UN; Tue, 22 Sep 2020 13:37:16 +0000 Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team CC: Xen.org security team Subject: Xen Security Advisory 338 v4 (CVE-2020-25597) - once valid event channels may not turn invalid Message-Id: Date: Tue, 22 Sep 2020 13:37:16 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Xen Security Advisory CVE-2020-25597 / XSA-338 version 4 once valid event channels may not turn invalid UPDATES IN VERSION 4 ==================== Public release. ISSUE DESCRIPTION ================= Logic in the handling of event channel operations in Xen assumes that an event channel, once valid, will not become invalid over the life time of a guest. However, operations like the resetting of all event channels may involve decreasing one of the bounds checked when determining validity. This may lead to bug checks triggering, crashing the host. IMPACT ====== An unprivileged guest may be able to crash Xen, leading to a Denial of Service (DoS) for the entire system. VULNERABLE SYSTEMS ================== All Xen versions from 4.4 onwards are vulnerable. Xen versions 4.3 and earlier are not vulnerable. Only systems with untrusted guests permitted to create more than the default number of event channels are vulnerable. This number depends on the architecture and type of guest. For 32-bit x86 PV guests, this is 1023; for 64-bit x86 PV guests, and for all ARM guests, this number is 4095. Systems where untrusted guests are limited to fewer than this number are not vulnerable. Note that xl and libxl limit max_event_channels to 1023 by default, so systems using exlusively xl, libvirt+libxl, or their own toolstack based on libxl, and not explicitly setting max_event_channels, are not vulnerable. MITIGATION ========== The problem can be avoided by reducing the number of event channels available to the guest to no more than 1023. For example, setting "max_event_channels=1023" in the xl domain configuration, or deleting any existing setting (since 1023 is the default for xl/libxl). For ARM systems, any limit no more than 4095 is safe. For 64-bit x86 PV guests, any limit no more than 4095 is likewise safe if the host configuration prevents the guest administrator from substituting and running a 32-bit kernel (and thereby putting the guest into 32-bit PV mode). CREDITS ======= This issue was discovered by Jan Beulich of SUSE. RESOLUTION ========== Applying the attached patch resolves this issue. Note that patches for released versions are generally prepared to apply to the stable branches, and may not apply cleanly to the most recent release tarball. Downstreams are encouraged to update to the tip of the stable branch before applying these patches. xsa338.patch Xen 4.10 - xen-unstable $ sha256sum xsa338* 56c322b89a96db6be40cf15fdb9303e24ff692aa5a6274b2d7718bfc05acf309 xsa338.meta 7345eac1cbad23b082523e9cbd0331f8a9f16c6e459fb2a686606253f5514c9b xsa338.patch $ DEPLOYMENT DURING EMBARGO ========================= Deployment of the *patch* described above (or others which are substantially similar) is permitted during the embargo, even on public-facing systems with untrusted guest users and administrators. But: Distribution of updated software is prohibited (except to other members of the predisclosure list). And: deployment of the event channel limit reduction mitigation is NOT permitted (except where all the affected systems and VMs are administered and used only by organisations which are members of the Xen Project Security Issues Predisclosure List). Specifically, deployment on public cloud systems is NOT permitted. This is because such a change can be visible to the guest, so it would leak the preconditions for the vulnerability and maybe lead to rediscovery. Deployment of this, or similar mitigations, is permitted only AFTER the embargo ends. Predisclosure list members who wish to deploy significantly different patches and/or mitigations, please contact the Xen Project Security Team. (Note: this during-embargo deployment notice is retained in post-embargo publicly released Xen Project advisories, even though it is then no longer applicable. This is to enable the community to have oversight of the Xen Project Security Team's decisionmaking.) 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Tue, 22 Sep 2020 13:38:03 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiUb-0001gh-Hi for xen-users@lists.xen.org; Tue, 22 Sep 2020 13:38:01 +0000 X-Inumbo-ID: c848ba9c-7649-4b31-8d4d-31d28757ef0a Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id c848ba9c-7649-4b31-8d4d-31d28757ef0a; Tue, 22 Sep 2020 13:37:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Date:Message-Id:Subject:CC:From:To:MIME-Version: Content-Transfer-Encoding:Content-Type; bh=mW+BhOO+gLBe3N5yVv/AmCHZwB1mJcUT0ffbghSDYeg=; b=wy0GH4ziap/HWkXdZrqidx8kl+ F4YDk6IlVxg95QmmwBcpz3sOqjqZ1O9hJpk+NnGlQyRTXnRoSzMnqrtXeSDMFF48l1rIcsKswhwxU yDvCGW4VuoDXs5YFClNmnvUxOiQr19kHkz/yDMYAg3xveZL+97Cx9G23kETAUrA/WPrI=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiTt-0006pl-Ix; Tue, 22 Sep 2020 13:37:17 +0000 Received: from iwj by xenbits.xenproject.org with local (Exim 4.92) (envelope-from ) id 1kKiTt-0002Lq-ID; Tue, 22 Sep 2020 13:37:17 +0000 Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team CC: Xen.org security team Subject: Xen Security Advisory 339 v3 (CVE-2020-25596) - x86 pv guest kernel DoS via SYSENTER Message-Id: Date: Tue, 22 Sep 2020 13:37:17 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Xen Security Advisory CVE-2020-25596 / XSA-339 version 3 x86 pv guest kernel DoS via SYSENTER UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= The SYSENTER instruction leaves various state sanitization activities to software. One of Xen's sanitization paths injects a #GP fault, and incorrectly delivers it twice to the guest. This causes the guest kernel to observe a kernel-privilege #GP fault (typically fatal) rather than a user-privilege #GP fault (usually converted into SIGSEGV/etc). IMPACT ====== Malicious or buggy userspace can crash the guest kernel, resulting in a VM Denial of Service. VULNERABLE SYSTEMS ================== All versions of Xen from 3.2 onwards are vulnerable. Only x86 systems are vulnerable. ARM platforms are not vulnerable. Only x86 systems which support the SYSENTER instruction in 64bit mode are vulnerable. This is believed to be Intel, Centaur and Shanghai CPUs. AMD and Hygon CPUs are not believed to be vulnerable. Only x86 PV guests can exploit the vulnerability. x86 PVH / HVM guests cannot exploit the vulnerability. MITIGATION ========== Running only x86 PVH / HVM guests avoids the vulnerability. CREDITS ======= This issue was discovered by Andrew Cooper of Citrix. RESOLUTION ========== Applying the attached patch resolves this issue. Note that patches for released versions are generally prepared to apply to the stable branches, and may not apply cleanly to the most recent release tarball. Downstreams are encouraged to update to the tip of the stable branch before applying these patches. xsa339.patch Xen 4.10 - xen-unstable $ sha256sum xsa339* 5cece13878cc40b32bc5753c0ef64f989f9b1c7f9549d62ea4fcd06e9620de9e xsa339.meta b6ffa7671d905aa12498ad64915be3b7cba74ce1c5bf6bce18b1f106ebf6d715 xsa339.patch $ DEPLOYMENT DURING EMBARGO ========================= Deployment of the patches and/or mitigations described above (or others which are substantially similar) is permitted during the embargo, even on public-facing systems with untrusted guest users and administrators. But: Distribution of updated software is prohibited (except to other members of the predisclosure list). Predisclosure list members who wish to deploy significantly different patches and/or mitigations, please contact the Xen Project Security Team. (Note: this during-embargo deployment notice is retained in post-embargo publicly released Xen Project advisories, even though it is then no longer applicable. This is to enable the community to have oversight of the Xen Project Security Team's decisionmaking.) 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Tue, 22 Sep 2020 13:38:51 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiVN-0002QV-Ux for xen-users@lists.xen.org; Tue, 22 Sep 2020 13:38:50 +0000 X-Inumbo-ID: e97c6954-660a-4be8-af63-cd5e3d6224ee Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id e97c6954-660a-4be8-af63-cd5e3d6224ee; Tue, 22 Sep 2020 13:38:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Date:Message-Id:Subject:CC:From:To:MIME-Version: Content-Transfer-Encoding:Content-Type; bh=qfPJ0HKGMpcAGPsSISgU9KbS1Ve8/fPKdWDIOZOZNe0=; b=LQtqP9l2m+UFFwTn6kTI/lXqEW /Ja1YbNI1HFnVcKgYalP57EjLikMPEqSc4r2LvIi+ZcspKFjBK9sIqDrfaZiZ8aSs00JM97FbqhL7 IzpNrh0BlSoLZ0k7EZbH/L2wNWxV3+0d/8kxtO/dN8qWW6PXNgwdR+jjEqQO0MXE0I7U=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiV4-0006uY-9X; Tue, 22 Sep 2020 13:38:30 +0000 Received: from iwj by xenbits.xenproject.org with local (Exim 4.92) (envelope-from ) id 1kKiV4-00042p-8K; Tue, 22 Sep 2020 13:38:30 +0000 Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team CC: Xen.org security team Subject: Xen Security Advisory 343 v4 (CVE-2020-25599) - races with evtchn_reset() Message-Id: Date: Tue, 22 Sep 2020 13:38:30 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Xen Security Advisory CVE-2020-25599 / XSA-343 version 4 races with evtchn_reset() UPDATES IN VERSION 4 ==================== Fix build of backports of patch 3. Adjust affect versions. Public release. ISSUE DESCRIPTION ================= Uses of EVTCHNOP_reset (potentially by a guest on itself) or XEN_DOMCTL_soft_reset (by itself covered by XSA-77) can lead to the violation of various internal assumptions. This may lead to out of bounds memory accesses or triggering of bug checks. IMPACT ====== In particular x86 PV guests may be able to elevate their privilege to that of the host. Host and guest crashes are also possible, leading to a Denial of Service (DoS). Information leaks cannot be ruled out. VULNERABLE SYSTEMS ================== All Xen versions from 4.5 onwards are vulnerable. Xen versions 4.4 and earlier are not vulnerable. MITIGATION ========== There is no known mitigation. CREDITS ======= Different aspects of this issue were discovered by Julien Grall of Amazon and by Jan Beulich of SUSE. RESOLUTION ========== Applying the appropriate set of attached patches resolves this issue. Note that patches for released versions are generally prepared to apply to the stable branches, and may not apply cleanly to the most recent release tarball. Downstreams are encouraged to update to the tip of the stable branch before applying these patches. xsa343/xsa343-?.patch Xen 4.13 - xen-unstable xsa343/xsa343-4.12-?.patch Xen 4.12 xsa343/xsa343-4.11-?.patch Xen 4.11 xsa343/xsa343-4.10-?.patch Xen 4.10 $ sha256sum xsa343* xsa343*/* 097d5fa32e22fc7a18fddd757f950699e823202bbae67245eece783d6d06f4eb xsa343.meta d714a542bae9d96b6a061c5a8f754549d699dcfb7bf2a766b721f6bbe33aefd2 xsa343/xsa343-1.patch 657c44c8ea13523d2e59776531237bbc20166c9b7c3960e0e9ad381fce927344 xsa343/xsa343-2.patch 2b275e3fa559167c1b59e6fd4a20bc4d1df9d9cb0cbd0050a3db9c3d0299b233 xsa343/xsa343-3.patch 9aec124e2afcba57f8adaf7374ecebffc4a8ed1913512a7456f87761bb115f68 xsa343/xsa343-4.10-1.patch 54d9ce9acdb8dcc6aa81928037afbb081a6cd579127aa225833767e285e30ea2 xsa343/xsa343-4.10-2.patch 3801300cddd8d138c800dc45eeff111e313eb40cea3aa94e2e045ac8956ab9d3 xsa343/xsa343-4.10-3.patch 7abbec828f77c427a53182db820fc19bdf34e37882fc6ae51351ed6027c56da1 xsa343/xsa343-4.11-1.patch 5c90a53333e9c81ce938deddfc690f474d61e083d2a43b859d3227100f793aff xsa343/xsa343-4.11-2.patch 0e12cfe8e505b9685912c61a740b98084d62e4ba0670d51a47345739f463a039 xsa343/xsa343-4.11-3.patch f3462b4e672f69a9fa951b1c04a50d754c64d18aadf444ef248587b3ac7f635a xsa343/xsa343-4.12-1.patch d99cbbc3792755c4998b73460bbeaef5612a8942f98adcaea0762950e5a07c2a xsa343/xsa343-4.12-2.patch cf23d3b61d4f07efc7057035c45e53e32a0b0f8fc3b9bc6c05f0f5bc71204914 xsa343/xsa343-4.12-3.patch $ DEPLOYMENT DURING EMBARGO ========================= Deployment of the patches and/or mitigations described above (or others which are substantially similar) is permitted during the embargo, even on public-facing systems with untrusted guest users and administrators. But: Distribution of updated software is prohibited (except to other members of the predisclosure list). Predisclosure list members who wish to deploy significantly different patches and/or mitigations, please contact the Xen Project Security Team. (Note: this during-embargo deployment notice is retained in post-embargo publicly released Xen Project advisories, even though it is then no longer applicable. This is to enable the community to have oversight of the Xen Project Security Team's decisionmaking.) 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1kKiVU-0001gf-AA for xen-users@lists.xen.org; Tue, 22 Sep 2020 13:38:56 +0000 X-Inumbo-ID: 50c0fac2-01a5-45ac-a520-95e7fd94dd05 Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 50c0fac2-01a5-45ac-a520-95e7fd94dd05; Tue, 22 Sep 2020 13:37:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Date:Message-Id:Subject:CC:From:To:MIME-Version: Content-Transfer-Encoding:Content-Type; bh=s1/eiQL/ZKRDrFJhSUS04wCMUoU1Q8fXwLgWCPlBcm4=; b=d6pkkz1JaebTjOSwVyOnQDPDk+ j/u2P+Ji2BUPYj0TnQ66EtU15MUai0EZx6gla7Bg8uS+5PltcyJgqnxdxyBbnzq6E6IXda/4t69HZ fMwtohaJ5ExGtfl4Fcayqs0d/0xIqOaAhkFrD8QvD/HnaT/Ok4ljOyZohjm1JFzpipAU=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiTu-0006qB-SD; Tue, 22 Sep 2020 13:37:18 +0000 Received: from iwj by xenbits.xenproject.org with local (Exim 4.92) (envelope-from ) id 1kKiTu-0002Nl-RM; Tue, 22 Sep 2020 13:37:18 +0000 Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team CC: Xen.org security team Subject: Xen Security Advisory 342 v3 (CVE-2020-25600) - out of bounds event channels available to 32-bit x86 domains Message-Id: Date: Tue, 22 Sep 2020 13:37:18 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Xen Security Advisory CVE-2020-25600 / XSA-342 version 3 out of bounds event channels available to 32-bit x86 domains UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= The so called 2-level event channel model imposes different limits on the number of usable event channels for 32-bit x86 domains vs 64-bit or Arm (either bitness) ones. 32-bit x86 domains can use only 1023 channels, due to limited space in their shared (between guest and Xen) information structure, whereas all other domains can use up to 4095 in this model. The recording of the respective limit during domain initialization, however, has occurred at a time where domains are still deemed to be 64-bit ones, prior to actually honoring respective domain properties. At the point domains get recognized as 32-bit ones, the limit didn't get updated accordingly. Due to this misbehavior in Xen, 32-bit domains (including Domain 0) servicing other domains may observe event channel allocations to succeed when they should really fail. Subsequent use of such event channels would then possibly lead to corruption of other parts of the shared info structure. IMPACT ====== An unprivileged guest may cause another domain, in particular Domain 0, to misbehave. This may lead to a Denial of Service (DoS) for the entire system. VULNERABLE SYSTEMS ================== All Xen versions from 4.4 onwards are vulnerable. Xen versions 4.3 and earlier are not vulnerable. Only x86 32-bit domains servicing other domains are vulnerable. Arm systems as well as x86 64-bit domains are not vulnerable. MITIGATION ========== There is no known workaround for x86 32-bit Domain 0. The problem can be avoided by reducing the number of event channels available to 32-bit x86 guests to no more than 1023. For example, setting "max_event_channels=1023" in the xl domain configuration, or deleting any existing setting (since 1023 is the default for xl/libxl). CREDITS ======= This issue was discovered by Julien Grall of Amazon. RESOLUTION ========== Applying the appropriate attached patch resolves this issue. Note that patches for released versions are generally prepared to apply to the stable branches, and may not apply cleanly to the most recent release tarball. Downstreams are encouraged to update to the tip of the stable branch before applying these patches. xsa342.patch Xen 4.14 - xen-unstable xsa342-4.13.patch Xen 4.10 - 4.13 $ sha256sum xsa342* 8e85719f2783d5d0fc3da7a6aefb6c83717c7aa195d027b6aa52ff3a31c489aa xsa342.meta 060caee3fb5971fca0f2fbdef622c52d9bc6e0ed9efad33de5b6b504651c2112 xsa342.patch ef34839148d33b8d9cb03d56ffafdcdcbe9641a737211a50343d019132b169dd xsa342-4.13.patch $ DEPLOYMENT DURING EMBARGO ========================= Deployment of the patches and/or mitigations described above (or others which are substantially similar) is permitted during the embargo, even on public-facing systems with untrusted guest users and administrators. But: Distribution of updated software is prohibited (except to other members of the predisclosure list). Predisclosure list members who wish to deploy significantly different patches and/or mitigations, please contact the Xen Project Security Team. (Note: this during-embargo deployment notice is retained in post-embargo publicly released Xen Project advisories, even though it is then no longer applicable. This is to enable the community to have oversight of the Xen Project Security Team's decisionmaking.) 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xen-users-bounces@lists.xenproject.org Tue Sep 22 13:42:07 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Tue, 22 Sep 2020 13:42:07 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiXi-0004Cg-S5; Tue, 22 Sep 2020 13:41:14 +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 4.92) (envelope-from ) id 1kKiVA-0001gf-9R for xen-users@lists.xen.org; Tue, 22 Sep 2020 13:38:36 +0000 X-Inumbo-ID: cc05c3e9-28cc-4c45-890f-ffa67c39f595 Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id cc05c3e9-28cc-4c45-890f-ffa67c39f595; Tue, 22 Sep 2020 13:37:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Date:Message-Id:Subject:CC:From:To:MIME-Version: Content-Transfer-Encoding:Content-Type; bh=5EodKS5n302O7EkAVxpijzq7oQhWiVMBjP82S3AFsSM=; b=dedpOWBHRUjLBXaBxq+0SaJuzP es6fZyQ3j867Us3kEyyFVHZJ7j6JS10jk1tlIZNafraJFSlTIQtI4oUR/bD8rzClJCvtTFxcHTT+8 zFXuB8o3/beCbV57mCZAMjk1WYthkiz/SCF1muR78hTBFSixyrP59JImKGdQRoXXK6rk=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiTs-0006pJ-BA; Tue, 22 Sep 2020 13:37:16 +0000 Received: from iwj by xenbits.xenproject.org with local (Exim 4.92) (envelope-from ) id 1kKiTs-0002K0-AD; Tue, 22 Sep 2020 13:37:16 +0000 Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team CC: Xen.org security team Subject: Xen Security Advisory 337 v3 (CVE-2020-25595) - PCI passthrough code reading back hardware registers Message-Id: Date: Tue, 22 Sep 2020 13:37:16 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Xen Security Advisory CVE-2020-25595 / XSA-337 version 3 PCI passthrough code reading back hardware registers UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= Code paths in Xen's MSI handling have been identified which act on unsanitized values read back from device hardware registers. While devices strictly compliant with PCI specifications shouldn't be able to affect these registers, experience shows that it's very common for devices to have out-of-spec "backdoor" operations which can affect the result of these reads. IMPACT ====== A not fully trusted guest may be able to crash Xen, leading to a Denial of Service (DoS) for the entire system. Privilege escalation and information leaks cannot be excluded. VULNERABLE SYSTEMS ================== All versions of Xen supporting PCI passthrough are affected. Only x86 systems are vulnerable. Arm systems are not vulnerable. Only guests with passed through PCI devices may be able to leverage the vulnerability. Only systems passing through devices with out-of-spec ("backdoor") functionality can cause issues. Experience shows that such out-of-spec functionality is common; unless you have reason to believe that your device does not have such functionality, it's better to assume that it does. REMINDER OF PCI PASSTHROUGH SUPPORT STATEMENT ============================================= The security team wishes to reiterate our support statement for PCI Device Passthrough (found in xen.git/SUPPORT.md): "Because of hardware limitations (affecting any operating system or hypervisor), it is generally not safe to use this feature to expose a physical device to completely untrusted guests. However, this feature can still confer significant security benefit when used to remove drivers and backends from domain 0 (i.e., Driver Domains)." The possibility of "backdoor" device functionality mentioned above is one of the major reasons for this stance. We issue this XSA to help maintain Driver Domains as a "defense-in-depth", and also on behalf of those who may have done full security audits of their particular hardware platform. It does not change our stance that passing through PCI devices to untrusted guests is in general not safe. MITIGATION ========== Not passing through physical devices to untrusted guests will avoid the vulnerability. CREDITS ======= This issue was discovered by Andrew Cooper of Citrix. RESOLUTION ========== Applying the appropriate pair of attached patches resolves this issue. Note that patches for released versions are generally prepared to apply to the stable branches, and may not apply cleanly to the most recent release tarball. Downstreams are encouraged to update to the tip of the stable branch before applying these patches. xsa337/xsa337-?.patch Xen 4.14 - xen-unstable xsa337/xsa337-4.13-?.patch Xen 4.13 xsa337/xsa337-4.12-?.patch Xen 4.10 - 4.12 $ sha256sum xsa337* xsa337*/* f027d07fb307f5441ee9d19b6385e421bba745059667d181031b0bfd7047a15b xsa337.meta 98c48781dd46bf6ff6cc46246c6c9f2e2be6ec696c0e7918d4b82845588ce04e xsa337/xsa337-1.patch 9e8ae24222371379f2ea62e14fcc7f7282e01c356dff230c22c9ab1d2fb941e2 xsa337/xsa337-2.patch a6744fdab01877e098f88dcd3bee10c3146aef66170a1422b3811cd09fc9faef xsa337/xsa337-4.12-1.patch a091652f1a3c0bf851e35b61d338d53b4690fab828b3c30f354c28c377af2aee xsa337/xsa337-4.12-2.patch fb27fd2508e017bf05131eb3d31bb8cc56c79690cbb7f1af76cb92fd568040a1 xsa337/xsa337-4.13-1.patch a25bc70ad55716ce3a0d9435fa2b0a492420a0eabfb0e3f94cd27de10242d98b xsa337/xsa337-4.13-2.patch $ DEPLOYMENT DURING EMBARGO ========================= Deployment of the patches described above (or others which are substantially similar) is permitted during the embargo, even on public-facing systems with untrusted guest users and administrators. HOWEVER, deployment of the mitigation is NOT permitted (except where all the affected systems and VMs are administered and used only by organisations which are members of the Xen Project Security Issues Predisclosure List). Specifically, deployment on public cloud systems is NOT permitted. This is because removing of pass-through devices or their replacement by emulated devices is a guest visible configuration change, which may lead to re-discovery of the issue. Deployment of this mitigation is permitted only AFTER the embargo ends. AND: Distribution of updated software is prohibited (except to other members of the predisclosure list). Predisclosure list members who wish to deploy significantly different patches and/or mitigations, please contact the Xen Project Security Team. (Note: this during-embargo deployment notice is retained in post-embargo publicly released Xen Project advisories, even though it is then no longer applicable. This is to enable the community to have oversight of the Xen Project Security Team's decisionmaking.) For more information about permissible uses of embargoed information, consult the Xen Project community's agreed Security Policy: http://www.xenproject.org/security-policy.html -----BEGIN PGP SIGNATURE----- iQFABAEBCAAqFiEEI+MiLBRfRHX6gGCng/4UyVfoK9kFAl9p/ecMHHBncEB4ZW4u b3JnAAoJEIP+FMlX6CvZlcIIAKtn9RdA/CjIRcodtfxnnFPQu9SRtmHfLNQ2Vjmu F1nIjjEklUNJSpGlEGjG1cq3oA/SZTm2jYXu2k4rcAyrl0bhaflSoL/N+Fmwo2Ym 898KA8gLdIckagxz5WKVv/vqc3x/h2IZgN4AUgt73buUOxEBFudqJKvnwtep5Z5R 60MDs+lp/5Mp6cXUukAWzPnmtJDWZ4s4QHXHNkKXTUpByZfmGJqqflL6yJDFHSxt vvGpvElApkMP4Ks+rPoCrdG/ObbQvgwMgSJ//tnnWayfs1asOxrRbFlLAt4yVvdt Y6Hi69hHB+ZWO36qy5dvjjKk0ftbrPAPDbDk27y/zuKXhko= =TzZR -----END PGP SIGNATURE----- --=separator Content-Type: application/octet-stream; name="xsa337.meta" Content-Disposition: attachment; filename="xsa337.meta" Content-Transfer-Encoding: base64 ewogICJYU0EiOiAzMzcsCiAgIlN1cHBvcnRlZFZlcnNpb25zIjogWwogICAg Im1hc3RlciIsCiAgICAiNC4xNCIsCiAgICAiNC4xMyIsCiAgICAiNC4xMiIs 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from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiXp-0004HN-MI; Tue, 22 Sep 2020 13:41:21 +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 4.92) (envelope-from ) id 1kKiV0-0001gf-9H for xen-users@lists.xen.org; Tue, 22 Sep 2020 13:38:26 +0000 X-Inumbo-ID: 73231768-1263-448c-8ad1-53a6b84e9198 Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 73231768-1263-448c-8ad1-53a6b84e9198; Tue, 22 Sep 2020 13:37:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Date:Message-Id:Subject:CC:From:To:MIME-Version: Content-Transfer-Encoding:Content-Type; bh=P9III5Ux8cBix1wVhd0lKbgBUp5J/+qWRAlqvlc02KY=; b=7LIeJZJF+SZ6Vy2H5SIuPPRyuy uPP23GEDZCR3nvAE1lh0RqPNq3QsXAI+dbU/KaxRJTpwwYnVjVxtddeRDcFsNah8wrssl+OeKgXxK 6U0OKYLU6P6aFsynnyZV7Be+rZ6tcW2h4HjkEbP4ruDyM81CFadvv9yR5o84W94EKSOU=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiTu-0006px-7s; Tue, 22 Sep 2020 13:37:18 +0000 Received: from iwj by xenbits.xenproject.org with local (Exim 4.92) (envelope-from ) id 1kKiTu-0002Mo-6u; Tue, 22 Sep 2020 13:37:18 +0000 Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team CC: Xen.org security team Subject: Xen Security Advisory 340 v3 (CVE-2020-25603) - Missing memory barriers when accessing/allocating an event channel Message-Id: Date: Tue, 22 Sep 2020 13:37:18 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Xen Security Advisory CVE-2020-25603 / XSA-340 version 3 Missing memory barriers when accessing/allocating an event channel UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= Event channels control structures can be accessed lockless as long as the port is considered to be valid. Such sequence is missing appropriate memory barrier (e.g smp_*mb()) to prevent both the compiler and CPU to re-order access. IMPACT ====== A malicious guest may be able to cause a hypervisor crash resulting in a Denial of Service (DoS). Information leak and privilege escalation cannot be excluded. VULNERABLE SYSTEMS ================== Systems running all versions of Xen are affected. Whether a system is vulnerable will depend on the CPU and compiler used to build Xen. For all the systems, the presence and the scope of the vulnerability depends on the precise re-ordering performed by the compiler used to build Xen. We have not been able to survey compilers; consequently we cannot say which compiler(s) might produce vulnerable code (with which code generation options). GCC documentation clearly suggests that re-ordering is possible. Arm systems will also be vulnerable if the CPU is able to re-order memory access. Please consult your CPU vendor. x86 systems are only vulnerable if a compiler performs re-ordering. MITIGATION ========== There is no known mitigation. CREDITS ======= This issue was discovered by Julien Grall of Amazon. RESOLUTION ========== Applying the attached patch resolves this issue. Note that patches for released versions are generally prepared to apply to the stable branches, and may not apply cleanly to the most recent release tarball. Downstreams are encouraged to update to the tip of the stable branch before applying these patches. xsa340.patch Xen 4.10 - xen-unstable $ sha256sum xsa340* 72b75011b99e914ddb479082f88329063dcd1f55cc931059d950ecda276ee944 xsa340.meta 2bb088fcc1f8f79bf5ddb7b4e101cb1db76a343d2fb1cdafb7cd54612e4009da xsa340.patch $ DEPLOYMENT DURING EMBARGO ========================= Deployment of the patches and/or mitigations described above (or others which are substantially similar) is permitted during the embargo, even on public-facing systems with untrusted guest users and administrators. But: Distribution of updated software is prohibited (except to other members of the predisclosure list). Predisclosure list members who wish to deploy significantly different patches and/or mitigations, please contact the Xen Project Security Team. (Note: this during-embargo deployment notice is retained in post-embargo publicly released Xen Project advisories, even though it is then no longer applicable. This is to enable the community to have oversight of the Xen Project Security Team's decisionmaking.) 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Tue, 22 Sep 2020 13:41:26 +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 4.92) (envelope-from ) id 1kKiVo-0001gf-As for xen-users@lists.xen.org; Tue, 22 Sep 2020 13:39:16 +0000 X-Inumbo-ID: 4fd9d5fa-9601-44b8-90f3-58d22c4288c0 Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 4fd9d5fa-9601-44b8-90f3-58d22c4288c0; Tue, 22 Sep 2020 13:37:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Date:Message-Id:Subject:CC:From:To:MIME-Version: Content-Transfer-Encoding:Content-Type; bh=cv2cHzbgE+rQHxKKk/YQTNnukmQ/m7QjE3hTDURZxQ4=; b=sWnakAPhotP6CQyg6WcvAlsyK0 uRTsB/EOc2cuQ+74bzqn6otvzGW7r5KnBRX6/Os92rIzS1FJTODCB/Pruhqo8K8lhXUm4uWQrUp04 PrgTeUpUvF6016/XLFDWovMWMJgmUclYg+fJ3hpCE4a5gOTAJmAEdzJHddxIawRxDsE8=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiTv-0006qb-NZ; Tue, 22 Sep 2020 13:37:19 +0000 Received: from iwj by xenbits.xenproject.org with local (Exim 4.92) (envelope-from ) id 1kKiTv-0002PV-Mj; Tue, 22 Sep 2020 13:37:19 +0000 Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team CC: Xen.org security team Subject: Xen Security Advisory 344 v4 (CVE-2020-25601) - lack of preemption in evtchn_reset() / evtchn_destroy() Message-Id: Date: Tue, 22 Sep 2020 13:37:19 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Xen Security Advisory CVE-2020-25601 / XSA-344 version 4 lack of preemption in evtchn_reset() / evtchn_destroy() UPDATES IN VERSION 4 ==================== Public release. ISSUE DESCRIPTION ================= In particular the FIFO event channel model allows guests to have a large number of event channels active at a time. Closing all of these when resetting all event channels or when cleaning up after the guest may take extended periods of time. So far there was no arrangement for preemption at suitable intervals, allowing a CPU to spend an almost unbounded amount of time in the processing of these operations. IMPACT ====== Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system. VULNERABLE SYSTEMS ================== All Xen versions are vulnerable in principle. Whether versions 4.3 and older are vulnerable depends on underlying hardware characteristics. MITIGATION ========== The problem can be avoided by reducing the number of event channels available to all guests to a suitably low limit. For example, setting "max_event_channels=256" in the xl domain configurations may be low enough for all hardware Xen is able to run on. CREDITS ======= This issue was discovered by Jan Beulich of SUSE. RESOLUTION ========== Applying the appropriate set of attached patches resolves this issue. Note that patches for released versions are generally prepared to apply to the stable branches, and may not apply cleanly to the most recent release tarball. Downstreams are encouraged to update to the tip of the stable branch before applying these patches. xsa344/xsa344-?.patch Xen 4.14 - xen-unstable xsa344/xsa344-4.13-?.patch Xen 4.13 xsa344/xsa344-4.12-?.patch Xen 4.12 xsa344/xsa344-4.11-?.patch Xen 4.11 xsa344/xsa344-4.10-?.patch Xen 4.10 $ sha256sum xsa344* xsa344*/* 74ae97a618a3680920bed131e69656d5a7c039efbbec99b55b99af772e3e87df xsa344.meta 5f9dbdc48bed502d614a76e5819afa41a72cec603c5a2c9491d73873a991a5ed xsa344/xsa344-1.patch 381ca5c51bc120bfd5c742be3988f570abb870c4b75c8a48cf49ae4fa1046d73 xsa344/xsa344-2.patch b52e4ecd6db8c3c6ebc0ab6facbd0f4fa0859657d13491819c3279fe439f66ec xsa344/xsa344-4.10-1.patch 53ca9c954fd73344968f40689b0d0ea583bd19ece72166fd2d4eaa125b82f26f xsa344/xsa344-4.10-2.patch 7abea30b406b0a572f7cd76bd9768d12262344a8e255ddd29d2ad893724638a0 xsa344/xsa344-4.11-1.patch f2b39146ac410154043efd09880277e4e821a1dd47a0bd3000545e5568253b97 xsa344/xsa344-4.11-2.patch a654c99f5d1c25d9d12ba267d2db10b0a1e0da337ce334fb5aafa6b2061ebc3c xsa344/xsa344-4.12-1.patch 6af4e05f8536b11a3dc4c70620b8ed973ecf09efd4c64eb500f6363d5f0402e7 xsa344/xsa344-4.12-2.patch 9b81c7cf3cd33f9d43c43222a0434a8d4e0acff74f339a6842f16bfa2f304cb5 xsa344/xsa344-4.13-1.patch 80a41b7e08cdb54a28dfc82630a0d8d89fc25e381bc4505ed41017a760addf09 xsa344/xsa344-4.13-2.patch $ DEPLOYMENT DURING EMBARGO ========================= Deployment of the patches and/or mitigations described above (or others which are substantially similar) is permitted during the embargo, even on public-facing systems with untrusted guest users and administrators. But: Distribution of updated software is prohibited (except to other members of the predisclosure list). Predisclosure list members who wish to deploy significantly different patches and/or mitigations, please contact the Xen Project Security Team. (Note: this during-embargo deployment notice is retained in post-embargo publicly released Xen Project advisories, even though it is then no longer applicable. This is to enable the community to have oversight of the Xen Project Security Team's decisionmaking.) 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X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1600784262; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+/b8fvvibtxXT6u1u9TDPmBkil4Zo6gAduyXPojkOQ0=; b=GX5l28Jpyss3rkYhvdCNigXoMm2NbVEmQTh1imSbjT+J6lxeP1xaY93lcDp4Z4n1UtL7fK a7U/RXZrfATnU4zCuqTGLHwGbEuXpub/58KZuwv73axhw8YDcuoFMnhZt73FSZAhlu/HOt DjEB/CkTzR3wkSrTrnug0JIgaKSjS+s= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 8EDD2AC97; Tue, 22 Sep 2020 14:18:19 +0000 (UTC) Subject: Re: oxenstored performance issue when starting VMs in parallel To: paul@xen.org, 'Edwin Torok' , sstabellini@kernel.org, 'Anthony Perard' , xen-devel@lists.xenproject.org Cc: xen-users@lists.xenproject.org, jerome.leseinne@gmail.com, julien@xen.org References: <46f1f50dc02c53391958d9d4bb5fc57d23ba6ede.camel@citrix.com> <00a101d690e6$33a88bd0$9af9a370$@xen.org> From: =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= Message-ID: <816d5bd8-6794-7fcd-bd08-6eb5a2248328@suse.com> Date: Tue, 22 Sep 2020 16:17:42 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <00a101d690e6$33a88bd0$9af9a370$@xen.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" On 22.09.20 15:42, Paul Durrant wrote: >> -----Original Message----- >> From: Edwin Torok >> Sent: 22 September 2020 14:29 >> To: sstabellini@kernel.org; Anthony Perard ; xen- >> devel@lists.xenproject.org; paul@xen.org >> Cc: xen-users@lists.xenproject.org; jerome.leseinne@gmail.com; julien@xen.org >> Subject: Re: oxenstored performance issue when starting VMs in parallel >> >> On Tue, 2020-09-22 at 15:17 +0200, jerome leseinne wrote: >>> Hi, >>> >>> Edwin you rock ! This call in qemu is effectively the culprit ! >>> I have disabled this xen_bus_add_watch call and re-run test on our >>> big server: >>> >>> - oxenstored is now between 10% to 20% CPU usage (previously was >>> 100% all the time) >>> - All our VMs are responsive >>> - All our VM start in less than 10 seconds (before the fix some VMs >>> could take more than one minute to be fully up >>> - Dom0 is more responsive >>> >>> Disabling the watch may not be the ideal solution ( I let the qemu >>> experts answer this and the possible side effects), >> >> Hi, >> >> CC-ed Qemu maintainer of Xen code, please see this discussion about >> scalability issues with the backend watching code in qemu 4.1+. >> >> I think the scalability issue is due to this code in qemu, which causes >> an instance of qemu to see watches from all devices (even those >> belonging to other qemu instances), such that adding a single device >> causes N watches to be fired on each N instances of qemu: >> xenbus->backend_watch = >> xen_bus_add_watch(xenbus, "", /* domain root node */ >> "backend", xen_bus_backend_changed, >> &local_err); >> >> I can understand that for backwards compatibility you might need this >> code, but is there a way that an up-to-date (xl) toolstack could tell >> qemu what it needs to look at (e.g. via QMP, or other keys in xenstore) >> instead of relying on an overly broad watch? > > I think this could be made more efficient. The call to "module_call_init(MODULE_INIT_XEN_BACKEND)" just prior to this watch will register backends that do auto-creation so we could register individual watches for the various backend types instead of this single one. The watch should be on guest domain level, e.g. for: /local/domain/0/backend/vbd/5 We have one qemu process per guest, after all. Juergen From xen-users-bounces@lists.xenproject.org Tue Sep 22 17:46:24 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Tue, 22 Sep 2020 17:46:24 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKmM0-0003bP-2Z; Tue, 22 Sep 2020 17:45:24 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKj9O-00044D-0v for xen-users@lists.xenproject.org; Tue, 22 Sep 2020 14:20:10 +0000 X-Inumbo-ID: 878c22f3-c6a0-4a52-aaa1-5bd256a32647 Received: from mail-wr1-x431.google.com (unknown [2a00:1450:4864:20::431]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 878c22f3-c6a0-4a52-aaa1-5bd256a32647; Tue, 22 Sep 2020 14:20:03 +0000 (UTC) Received: by mail-wr1-x431.google.com with SMTP id j2so17290847wrx.7; Tue, 22 Sep 2020 07:20:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:reply-to:to:cc:references:in-reply-to:subject:date:message-id :mime-version:content-transfer-encoding:content-language :thread-index; bh=wkHCv8F92nzhMr1RHQy8ugQFBMe6EAXcxhpmVIgirJg=; b=bZEz5ZSOdtlw1hbrTRbCt4TQleWCOIrQqCh+zziBxHWn/Y0rHwCD2DqETsuIw6SC/Z Nwx527eMnUlgT1UQhKhP7Sre1nwVc/H/uCCyARnpnduUEqFXuW8PZcmnvSMwgA25VnyZ 50jTfjbzXWOJ0kKCJsHUcNk4wddyijduXNdhp+NkzXvKUiIh+t2UxFhyu2Kl66/LvPFx mwS4SYVojCXTeXgiXOIbcir5lJ40mdIEsCBSs8yQsnThld9PtSwQJOurgPO5tisUdBZu PiTsU/a53PBRrQ/ssZIXIhVd+JmsfG+8g4X+C/WoxY+ndYQLiAWr4CnhAbXajGjoXumo 8C0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:reply-to:to:cc:references:in-reply-to :subject:date:message-id:mime-version:content-transfer-encoding :content-language:thread-index; bh=wkHCv8F92nzhMr1RHQy8ugQFBMe6EAXcxhpmVIgirJg=; b=krItZQtTWudcYD1bjwR1a46hK54qZ+Jb6i8qLco1cJcaENBRRPcmViCwToCygT/aI7 tZZiM2C2smM2l5vcKXo0MVKY8AEeI3cu+lQuvNpvG2fVUJ8y+D9/KInVRoEcAmRBUqS9 0spHTKwV5YN+OXcAt7noC3EhQIR5hGdJcmMqvVAsSJxje32rYvsTU7KztpFzyFG0SWDu obsb9mYhJYPcRd9ue3no8PeYpgrAcK2igJN2rV6YnlhGLQuxnMNcKeRkx0u09ZyRwxG0 Q4S6VScY9XNMBb/ZAH871ONUTxpyOzp8L3S3VEdH5fvHtSgAZg7wjIg/6SjjipDDLUe9 ewdw== X-Gm-Message-State: AOAM533ra1+uDL05d64CeXebEovbExEqjmorJLaPLj6LGUDOeSeiz5/q BJD8/eKBEVT0hvBEb/eMhDM= X-Google-Smtp-Source: ABdhPJzMVopL2etqqrOMerK9YUMg+ERAPjQyT1St+WmgTl8JcD5ZXnV+iVmMkZ8BpOR61tk5KR8wuA== X-Received: by 2002:adf:fd90:: with SMTP id d16mr5777892wrr.52.1600784402720; Tue, 22 Sep 2020 07:20:02 -0700 (PDT) Received: from CBGR90WXYV0 (host86-176-94-160.range86-176.btcentralplus.com. [86.176.94.160]) by smtp.gmail.com with ESMTPSA id h8sm26758632wrw.68.2020.09.22.07.20.01 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 22 Sep 2020 07:20:01 -0700 (PDT) From: Paul Durrant X-Google-Original-From: "Paul Durrant" To: =?utf-8?Q?'J=C3=BCrgen_Gro=C3=9F'?= , "'Edwin Torok'" , , "'Anthony Perard'" , Cc: , , References: <46f1f50dc02c53391958d9d4bb5fc57d23ba6ede.camel@citrix.com> <00a101d690e6$33a88bd0$9af9a370$@xen.org> <816d5bd8-6794-7fcd-bd08-6eb5a2248328@suse.com> In-Reply-To: <816d5bd8-6794-7fcd-bd08-6eb5a2248328@suse.com> Subject: RE: oxenstored performance issue when starting VMs in parallel Date: Tue, 22 Sep 2020 15:20:00 +0100 Message-ID: <00e901d690eb$759ff5a0$60dfe0e0$@xen.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Outlook 16.0 Content-Language: en-gb Thread-Index: AQIMrhWN1wQeREaSEc+MmVb+KxeEJQB0POE8AQkglPkA0UpCvgG7bFMSAn0bfWsCYHSeyqjBPSiw X-Mailman-Approved-At: Tue, 22 Sep 2020 17:45:22 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Reply-To: paul@xen.org Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" > -----Original Message----- > From: J=C3=BCrgen Gro=C3=9F > Sent: 22 September 2020 15:18 > To: paul@xen.org; 'Edwin Torok' ; = sstabellini@kernel.org; 'Anthony Perard' > ; xen-devel@lists.xenproject.org > Cc: xen-users@lists.xenproject.org; jerome.leseinne@gmail.com; = julien@xen.org > Subject: Re: oxenstored performance issue when starting VMs in = parallel >=20 > On 22.09.20 15:42, Paul Durrant wrote: > >> -----Original Message----- > >> From: Edwin Torok > >> Sent: 22 September 2020 14:29 > >> To: sstabellini@kernel.org; Anthony Perard = ; xen- > >> devel@lists.xenproject.org; paul@xen.org > >> Cc: xen-users@lists.xenproject.org; jerome.leseinne@gmail.com; = julien@xen.org > >> Subject: Re: oxenstored performance issue when starting VMs in = parallel > >> > >> On Tue, 2020-09-22 at 15:17 +0200, jerome leseinne wrote: > >>> Hi, > >>> > >>> Edwin you rock ! This call in qemu is effectively the culprit ! > >>> I have disabled this xen_bus_add_watch call and re-run test on our > >>> big server: > >>> > >>> - oxenstored is now between 10% to 20% CPU usage (previously was > >>> 100% all the time) > >>> - All our VMs are responsive > >>> - All our VM start in less than 10 seconds (before the fix some = VMs > >>> could take more than one minute to be fully up > >>> - Dom0 is more responsive > >>> > >>> Disabling the watch may not be the ideal solution ( I let the qemu > >>> experts answer this and the possible side effects), > >> > >> Hi, > >> > >> CC-ed Qemu maintainer of Xen code, please see this discussion about > >> scalability issues with the backend watching code in qemu 4.1+. > >> > >> I think the scalability issue is due to this code in qemu, which = causes > >> an instance of qemu to see watches from all devices (even those > >> belonging to other qemu instances), such that adding a single = device > >> causes N watches to be fired on each N instances of qemu: > >> xenbus->backend_watch =3D > >> xen_bus_add_watch(xenbus, "", /* domain root node */ > >> "backend", xen_bus_backend_changed, > >> &local_err); > >> > >> I can understand that for backwards compatibility you might need = this > >> code, but is there a way that an up-to-date (xl) toolstack could = tell > >> qemu what it needs to look at (e.g. via QMP, or other keys in = xenstore) > >> instead of relying on an overly broad watch? > > > > I think this could be made more efficient. The call to = "module_call_init(MODULE_INIT_XEN_BACKEND)" > just prior to this watch will register backends that do auto-creation = so we could register individual > watches for the various backend types instead of this single one. >=20 > The watch should be on guest domain level, e.g. for: >=20 > /local/domain/0/backend/vbd/5 >=20 > We have one qemu process per guest, after all. >=20 I'll see if I can spin a patch this afternoon. Paul >=20 > Juergen From xen-users-bounces@lists.xenproject.org Tue Sep 22 17:46:25 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Tue, 22 Sep 2020 17:46:25 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKmLz-0003b7-8Q; Tue, 22 Sep 2020 17:45:23 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kKiLs-0000Vc-IH for xen-users@lists.xenproject.org; Tue, 22 Sep 2020 13:29:00 +0000 X-Inumbo-ID: 46eb1aff-591c-4c1e-b891-385dbd38043e Received: from esa1.hc3370-68.iphmx.com (unknown [216.71.145.142]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 46eb1aff-591c-4c1e-b891-385dbd38043e; Tue, 22 Sep 2020 13:28:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=citrix.com; s=securemail; t=1600781333; h=from:to:cc:subject:date:message-id:references: 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"xen-devel@lists.xenproject.org" , "paul@xen.org" CC: "xen-users@lists.xenproject.org" , "jerome.leseinne@gmail.com" , "julien@xen.org" Subject: Re: oxenstored performance issue when starting VMs in parallel Thread-Topic: oxenstored performance issue when starting VMs in parallel Thread-Index: AQHWkDX0aRoo6zkA/E+panOpiMw6qalzLpQAgAFUxwCAAANDAA== Date: Tue, 22 Sep 2020 13:28:42 +0000 Message-ID: References: <46f1f50dc02c53391958d9d4bb5fc57d23ba6ede.camel@citrix.com> In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted Content-Type: text/plain; charset="utf-8" Content-ID: <3151AB87EB5AA243A27700A03982CBAE@citrix.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-Mailman-Approved-At: Tue, 22 Sep 2020 17:45:22 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen user discussion 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[86.176.94.160]) by smtp.gmail.com with ESMTPSA id j26sm27976424wrc.79.2020.09.22.06.42.23 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 22 Sep 2020 06:42:23 -0700 (PDT) From: Paul Durrant X-Google-Original-From: "Paul Durrant" To: "'Edwin Torok'" , , "'Anthony Perard'" , Cc: , , References: <46f1f50dc02c53391958d9d4bb5fc57d23ba6ede.camel@citrix.com> In-Reply-To: Subject: RE: oxenstored performance issue when starting VMs in parallel Date: Tue, 22 Sep 2020 14:42:22 +0100 Message-ID: <00a101d690e6$33a88bd0$9af9a370$@xen.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Outlook 16.0 Content-Language: en-gb Thread-Index: AQIMrhWN1wQeREaSEc+MmVb+KxeEJQB0POE8AQkglPkA0UpCvgG7bFMSqOgelyA= X-Mailman-Approved-At: Tue, 22 Sep 2020 17:45:22 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen user discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Reply-To: paul@xen.org Errors-To: xen-users-bounces@lists.xenproject.org Sender: "Xen-users" > -----Original Message----- > From: Edwin Torok > Sent: 22 September 2020 14:29 > To: sstabellini@kernel.org; Anthony Perard = ; xen- > devel@lists.xenproject.org; paul@xen.org > Cc: xen-users@lists.xenproject.org; jerome.leseinne@gmail.com; = julien@xen.org > Subject: Re: oxenstored performance issue when starting VMs in = parallel >=20 > On Tue, 2020-09-22 at 15:17 +0200, jerome leseinne wrote: > > Hi, > > > > Edwin you rock ! This call in qemu is effectively the culprit ! > > I have disabled this xen_bus_add_watch call and re-run test on our > > big server: > > > > - oxenstored is now between 10% to 20% CPU usage (previously was > > 100% all the time) > > - All our VMs are responsive > > - All our VM start in less than 10 seconds (before the fix some VMs > > could take more than one minute to be fully up > > - Dom0 is more responsive > > > > Disabling the watch may not be the ideal solution ( I let the qemu > > experts answer this and the possible side effects), >=20 > Hi, >=20 > CC-ed Qemu maintainer of Xen code, please see this discussion about > scalability issues with the backend watching code in qemu 4.1+. >=20 > I think the scalability issue is due to this code in qemu, which = causes > an instance of qemu to see watches from all devices (even those > belonging to other qemu instances), such that adding a single device > causes N watches to be fired on each N instances of qemu: > xenbus->backend_watch =3D > xen_bus_add_watch(xenbus, "", /* domain root node */ > "backend", xen_bus_backend_changed, > &local_err); >=20 > I can understand that for backwards compatibility you might need this > code, but is there a way that an up-to-date (xl) toolstack could tell > qemu what it needs to look at (e.g. via QMP, or other keys in = xenstore) > instead of relying on an overly broad watch? I think this could be made more efficient. The call to = "module_call_init(MODULE_INIT_XEN_BACKEND)" just prior to this watch = will register backends that do auto-creation so we could register = individual watches for the various backend types instead of this single = one. Paul >=20 > Best regards, > --Edwin >=20 >=20 > > but in our > > scenario and usage this fixes the problem and dramatically boosts = the > > performance. > > > > So far we haven't seen any side effect, all the xl orders are ok, = the > > VMs are fully functional, no devices leak (like network vif for > > exemple) and once all the VMs are down a call to xenstore-ls show > > that > > the store is indeed empty (dom0 excluded) > > > > We will continue additional testing and stress but in all cases a > > huge thanks to you and Julien for your help on this issue ! > > > > Jerome > > > > Le lun. 21 sept. 2020 =C3=A0 18:57, Edwin Torok = a > > =C3=A9crit : > > > On Mon, 2020-09-21 at 17:40 +0100, Julien Grall wrote: > > > > [CAUTION - EXTERNAL EMAIL] DO NOT reply, click links, or open > > > > attachments unless you have verified the sender and know the > > > > content > > > > is safe. > > > > > > > > On 21/09/2020 14:05, jerome leseinne wrote: > > > > > Hello, > > > > > > > > Hello, > > > > > > > > I am only CCing Edwin who is working on OXenStored. Hopefully, = he > > > > will > > > > be able to give you some pointers. > > > > > > > > > We are developing a solution based on Xen 4.13 who is > > > > > constantly > > > > > creating / destroying VMs. > > > > > > > > > > To summarize our lifecycle : > > > > > > > > > > - xl restore vmX > > > > > - xl cd-insert .... > > > > > - We do our stuff for ~ 2 minutes > > > > > - xl destroy vmX > > > > > > > > > > So our VMs have a life of approximately 2 minutes. > > > > > > > > > > The number of VMs we ran in parallel depends on the underlying > > > > > server. > > > > > > > > > > We are seeing the issue with our larger server who is running > > > > > 30 > > > > > VMs > > > > > (HVM) in parallel. > > > > > > > > > > On this server oxenstored is constantly running at 100% cpu > > > > > usage > > > > > and > > > > > some VMs are almost stucked or unresponsive. > > > > > > > > > > This is not an hardware issue, 72 xeon cores, 160 GB of memory > > > > > and > > > > > very fast I/O subsystem. > > > > > Everything else is running smoothly on the server. > > > > > > > > > > what we witness in the xenstore-access.log is that the number > > > > > of > > > > > WATCH > > > > > event is matching the number of currently running VMs > > > > > > > > > > so for example for a single WRITE event is followed by around > > > > > 30 > > > > > watch events : > > > > > > > > > > [20200918T15:15:18.045Z] A41354 write > > > > > /local/domain/0/backend/qdisk/1311/5632 > > > > > [20200918T15:15:18.046Z] A41248 w event > > > > > backend/qdisk/1311/5632 38ed11d9-9a38-4022-ad75-7c571d4886ed > > > > > [20200918T15:15:18.046Z] A41257 w event > > > > > backend/qdisk/1311/5632 98fa91b8-e88b-4667-9813-d95196257288 > > > > > [20200918T15:15:18.046Z] A40648 w event > > > > > backend/qdisk/1311/5632 e6fd9a35-61ec-4750-93eb-999fb7f662fc > > > > > [20200918T15:15:18.046Z] A40542 w event > > > > > > Hi, > > > > > > All the A here point to another unix domain socket. They have > > > all > > > registered a watch on this key (or a parent). > > > > > > To find out what key they are watching you can look for the watch > > > registration: > > > grep 'A41248 .*watch' /var/log/xenstored-access.log > > > > > > You can find out all xenstore clients connected to oxenstored, = find > > > all > > > the numbers in the port column here: > > > ss -a --unix -p|grep xenstored > > > Then look up those numbers, e.g. assuming you see 22269: > > > ss -a --unix -p|grep 22269 > > > > > > This should tell you what the processes are. > > > > > > I have a suspicion that it is related to this code in qemu: > > > > > > xenbus->backend_watch =3D > > > xen_bus_add_watch(xenbus, "", /* domain root node */ > > > "backend", xen_bus_backend_changed, > > > &local_err); > > > > > > If I read the code right this seems to set up a watch on > > > /local/domain/0/backend, so if you have N qemus running (one for > > > each > > > disk) then you get N^2 watch events fired in total. > > > > > > Best regards, > > > --Edwin > > > > > > > > backend/qdisk/1311/5632 6a39c858-2fd4-46e4-a810-485a41328f8c > > > > > [20200918T15:15:18.046Z] A41141 w event > > > > > backend/qdisk/1311/5632 8762d552-b4b4-41ef-a2aa-23700f790ea2 > > > > > [20200918T15:15:18.046Z] A41310 w event > > > > > backend/qdisk/1311/5632 4dc2a9ae-6388-4b0c-9c98-df3c897a832f > > > > > [20200918T15:15:18.046Z] A40660 w event > > > > > backend/qdisk/1311/5632 6abf244d-5939-4540-b176-4ec7d14b392c > > > > > [20200918T15:15:18.046Z] A41347 w event > > > > > backend/qdisk/1311/5632 ecb93157-9929-43e2-8ed4-f5e78ab2f37d > > > > > [20200918T15:15:18.046Z] A41015 w event > > > > > backend/qdisk/1311/5632 a1fec49f-e7cc-4059-87d3-ce43f386746e > > > > > [20200918T15:15:18.046Z] A41167 w event > > > > > backend/qdisk/1311/5632 e9419014-9fd2-47c0-b79d-30f99d9530d6 > > > > > [20200918T15:15:18.046Z] A41100 w event > > > > > backend/qdisk/1311/5632 a2754a91-ecd6-4b6b-87ea-b68db8b888df > > > > > [20200918T15:15:18.046Z] A41147 w event > > > > > backend/qdisk/1311/5632 176a1c3c-add7-4710-a7ee-3b5548d7a56a > > > > > [20200918T15:15:18.046Z] A41305 w event > > > > > backend/qdisk/1311/5632 afe7933b-c92d-4403-8d6c-2e530558c937 > > > > > [20200918T15:15:18.046Z] A40616 w event > > > > > backend/qdisk/1311/5632 35fa45e0-21e8-4666-825b-0c3d629f378d > > > > > [20200918T15:15:18.046Z] A40951 w event > > > > > backend/qdisk/1311/5632 230eb42f-d700-46ce-af61-89242847a978 > > > > > [20200918T15:15:18.046Z] A40567 w event > > > > > backend/qdisk/1311/5632 39cc7ffb-5045-4120-beb7-778073927c93 > > > > > [20200918T15:15:18.046Z] A41363 w event > > > > > backend/qdisk/1311/5632 9e42e74a-80fb-46e8-81f2-718628bf70f6 > > > > > [20200918T15:15:18.046Z] A40740 w event > > > > > backend/qdisk/1311/5632 1a64af31-fee6-45be-b8d8-c98baa5e162f > > > > > [20200918T15:15:18.046Z] A40632 w event > > > > > backend/qdisk/1311/5632 466ef522-cb76-4117-8e93-42471897c353 > > > > > [20200918T15:15:18.046Z] A41319 w event > > > > > backend/qdisk/1311/5632 19ea986b-e303-4180-b833-c691b2b32819 > > > > > [20200918T15:15:18.046Z] A40677 w event > > > > > backend/qdisk/1311/5632 fb01629a-033b-41d6-8349-cec82e570238 > > > > > [20200918T15:15:18.046Z] A41152 w event > > > > > backend/qdisk/1311/5632 84ce9e29-a5cc-42a1-a47b-497b95767885 > > > > > [20200918T15:15:18.047Z] A41233 w event > > > > > backend/qdisk/1311/5632 ea944ad3-3af6-4688-8076-db1eac25d8e9 > > > > > [20200918T15:15:18.047Z] A41069 w event > > > > > backend/qdisk/1311/5632 ce57e169-e1ea-4fb5-b97f-23e651f49d79 > > > > > [20200918T15:15:18.047Z] A41287 w event > > > > > backend/qdisk/1311/5632 d31110c8-ae0b-4b9d-b71f-aa2985addd1a > > > > > [20200918T15:15:18.047Z] A40683 w event > > > > > backend/qdisk/1311/5632 f0e4b0a0-fad0-4bb7-b01e-b8a31107ba3d > > > > > [20200918T15:15:18.047Z] A41177 w event > > > > > backend/qdisk/1311/5632 9ff80e49-4cca-4ec9-901a-d30198104f29 > > > > > [20200918T15:15:18.047Z] D0 w event > > > > > backend/qdisk/1311/5632 FFFFFFFF8276B520 > > > > > [20200918T15:15:18.047Z] A40513 w event > > > > > backend/qdisk/1311/5632 d35a9a42-c15e-492c-a70d-d8b20bafec8f > > > > > [20200918T15:15:18.047Z] A41354 w event > > > > > backend/qdisk/1311/5632 e4456ca4-70f4-4afc-9ba1-4a1cfd74c8e6 > > > > > > > > > > We are not sure this is the root cause of the issue but this = is > > > > > the > > > > > only real difference we can see in the log. > > > > > > > > > > We don't understand why the number of WATCH events is related > > > > > to > > > > > the > > > > > number of concurrent running VM. > > > > > A watch event should be registered and only fired for the > > > > > current > > > > > domain ID, so a write for a specific node path should only > > > > > trigger > > > > > one > > > > > watch event and not 30 in our case. > > > > > > > > > > Any ideas / comments ? 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[194.42.111.8]) by smtp.googlemail.com with ESMTPSA id h13sm1771098ljl.63.2020.09.24.07.11.33 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 24 Sep 2020 07:11:34 -0700 (PDT) To: xen-users@lists.xenproject.org From: =?UTF-8?Q?Krzysztof_Bier=c3=b3wka?= Subject: Xen crashes dom0 under heavy swap use Autocrypt: addr=calypso2k@gmail.com; keydata= mQINBFshN2MBEADEAAKGpCe3Ntgaye3utUVjSJqeOsCs19wTTKeqnmojlf+/PSDQmwc7iLYp wXH2AKXcUr810CeRuGed6ke9MzIpx0hN7jNni38PE//gTY4Ul8mEOSljbM+S20k48cVhKoxN r+itJN7wbDoHDpoLKDyRoqy8tu83xtpLA0fQ0KOiImRuq6ghjBGmz6YVYnLMVw/196PT99Wy mpIsd2X+iBpGLtJoBx5B+suCngVcJTjqUxwMg8+odO7gUNpn0U4Gc5E6rnlh7wVF9D1pOV7k vAX8Z5PxYX98Yod0VqM7GqgVJRmKUHb5asOWZgLKNHGEfrpswMb+Y5b0wAzg0EUXQuoKivCW 76/2iTgLxgX49raewjcJ/BExv4oLs/KEtkLvXd1INp4BJizXsxsliltSY+SOD485Y2ueG5Fx xlxtj3jsx7W3Vag92hSA74SMFXh6W/PbNtIeUmhUZhgSIIYxYG92oM7n5hcggqVXgCljdg3a 4Sr80B7ya9hcRTbVxLe5uOsB7IIP+4Xpb3OecKTQ61+Scl26YWm8h/fm5QICztao7hQqRxYe tvx/Q+rAgwQ//R8vQg7lDhH/WhCLynAUDVJvFCTUpGGiqXJm2NgbJ9iYH3BN/eEUrPHqtXKl /Xr5W5sMl5kC5jlF2S/GAv59JW0m+DIvIy0hpR8oVt9R6ja5NQARAQABtCtLcnp5c3p0b2Yg QmllcsOzd2thIDxrcnp5c3p0b2ZAYmllcm93a2EuZXU+iQJUBBMBCAA+FiEEkW0NFtpTDeSR FpFc2wMkxf8BllcFAlshN2MCGyMFCQlmAYAFCwkIBwIGFQoJCAsCBBYCAwECHgECF4AACgkQ 2wMkxf8BllcDow/+IRurDwoXlsRX7wnVte3UqyVhtMNv8fYw7oAAekd9X7OlGqNbaeizOfga h5WwEzcpbGSpy8nW+14VhhPvYk2TvP6lXAJtkSVIHAF5Va47oUPX+Kl1zlU4bGH9gG89p9Rx 3ebhTPp3PnVhBjFoZBbrTSeE6mOTwG4arx6c1Okex7dmzo5f4fXyE4/A89KnITUaD8cDmI9A Tk5WNB3fg2yvhX0yDp+u04xvR7H+2B2+YZgKusj+4h/OVPK2r4f3WJRAVi2iFhCyKdlX1McH Fk8dC4EgLmwg5FxzsrkZmniRvKL7R4hmuQlG6V3lhlHOtHK4IelqQJslhiXzzFxqawD4nzLo 252utZgOY86e7CtWXVwqiWth0FQtZen/TSmb1oXZ3E35hwnhx7my9N3X3U4FXZy+v2AOC4V+ wSJkvpFt9rOP51YUMHkLvLiq+xzaIACwNOfZ2ts2E5vgUZXw/Iif1UrhpPgEkAEXMbt3qRqi rwYFUp91lawbb/MSlS3A8bANHAAHe9QibQmAatXs4Xc3VFXdNMvhQa1H4Il2e307D9uQfWnI 6vBwshq6gnTVcn241Lnq2gTeF4nF0sO+m3xoa9dexbCsc9G/wOM7qNMMTkeMrx+rlAFm9b39 fL6CXgtv7FKnVFlOAnJ16VThlzQ9j4Ux+IBkzeFSsqo71bc92VS5Ag0EWyE3YwEQAMBmE637 rRbkrrzNtBTeKCjTvnIhJUjjdYWc7o8/DSP42+skplEvDHEHpXF+MysyK4iu1YjBlmSPiJq+ y/PmbF3Oy+hz/jOWrPcdch94ATOPUBxQQGXzpQeopz2E9liB0OuLjQcRXfxpbggebNKxyWNj jMOIsnwC++VbJU2TwKXwzNhr4Q5P2t1YAzscZy2IEl3hfMKdXheFxBfviRAmmQYtw/LSNVps t68NsW61actu9/hiUT+hSZeuTBr3LktvCXvTRhSZdSlZCA5Q69eZImLmbtJZZAK9fTYRTe1Y sAtJ/1azN4li+BzA1/KbEp++MU98WKQBPY2P2xhfP5VhuYtAs7xfIVD3puOiwX1tE9QwBOUb 9/Rvm3oOBkA23UDPtqU+t7Pl1VI+HMxD6xRm7Jiu3JJNPAtp2Ek5W/kSjwOp1g7p6VDkf6og ARtUyBKktrEeuLdRsJg8ijK0vrSS5iL7EGPLjNmsAsCpZrIs9xiOfMrZ3qXL7iEc9reO/HmC j13/jh5Vrae03+5h+VfOU27iiwDjpUcyivpgtv1ZMjqGC3vqznIMM8xOX+W8HowdBRw1D160 yZaMm0cDekxf8+josc0AESKQs2tyI8wbRTVqQKm65vbYU4ZCSrFNqvTx94Ij+myFW7xpb+oE 1w2cdkpQF6PFPI+d2Q8m1SU83zipABEBAAGJAjwEGAEIACYWIQSRbQ0W2lMN5JEWkVzbAyTF /wGWVwUCWyE3YwIbDAUJCWYBgAAKCRDbAyTF/wGWV64fEACUpArKV8QSInTW4B879vk/8sMn qj3FtQXVS6zImXw0Z6fA8ckwBGPKqTF1ucnt1xjYRRcvodd/pvrL/bo1s8bOwPLLleUJrNH3 iGgsU4NcXvAcgipUhfAsQ6IiI4oQIkVnq68NF8hBvRhK++Mzv5Ikx+sYWzVsmQprxLjUF7vF iwqb/l8FBBFA3N3RvBnx7j/+rr/x9c4HG9M0cbwwHUGKMsATPfAEDknYFxjHSwnnk/frSEPo hzvUlhWY9MZq3ySaPwS3pXnmnTclifHBDVuvv+f+5Gx+RXDnJIwGZU5L9+mTIas643quuFsu 71QZpq+8eFCiu2xeKbFHxqhSq2nMdH03XubJK3WZnpg//r4ktgAJ/7cUl91Y7jzCjkeB+QSS 3TS3XapqQ2jizPZa45SHNucCF7036uAive5HNYxfXhoHYAff+Y4kgHl56ic/QlrMjFQs3mDV HSU4U4I47XWrshpQQF5h0PmIXOYuJRn/v6/61NjYw+LPgBq6j9lmbUoGymA6gcY+1dAzMSKt C5RI9KDVynpG+1eQ1NkNw5Qg2anrl48I2bTKp7suqtSHRqOcg+cP50Cwh5Gd1daFR1CQ/oyR FHIJ7366vcWdue9y6cCto8PpYOGjO7TJ7k/n+qLELrf7zHJr6nIScRJ5unvKHDrAtxDak6dk cRolE/SjCw== Message-ID: <0c27ba3e-178a-c9e7-a5ab-8b1ec9501334@gmail.com> Date: Thu, 24 Sep 2020 16:11:33 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Mailman-Approved-At: Thu, 24 Sep 2020 20:45:09 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" hello, I'm trying to investigate a bug where heavy swap usage in dom0 crashes it (hard lockup). My platform is Intel NUC BOXNUC7PJYH2, latest BIOS. Hardware is tested and stable. xen 4.12, 4.13 and 4.14 crashes (hard lockup) dom0 under heavy swap usage, gentoo-sources-5.4.60 in dom0, steps to reproduce: - limit dom0 memory with dom0_mem=1024M,max:1024M and run no VMs OR - run some VMs, so there is not much memory left in dom0 AND - turn on swap in dom0 with swapon - compile gcc in dom0 with 15 threads (MAKEOPTS="-j15") I have two Intel based machines that I can reproduce with. But it seems to be this NUC specific. Can anyone shed some light on this topic? Regards, Krzysztof From xen-users-bounces@lists.xenproject.org Fri Sep 25 13:41:44 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Fri, 25 Sep 2020 13:41:44 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kLnxO-0000cj-30; Fri, 25 Sep 2020 13:40:14 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kLnxJ-0000ce-OV for xen-users@lists.xenproject.org; Fri, 25 Sep 2020 13:40:12 +0000 X-Inumbo-ID: d0e3d43c-eb71-48d8-8928-2fb0544ca022 Received: from mail.etit.hu (unknown [45.67.159.4]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id d0e3d43c-eb71-48d8-8928-2fb0544ca022; Fri, 25 Sep 2020 13:40:00 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mail.etit.hu (Postfix) with ESMTP id A89C432672C for ; Fri, 25 Sep 2020 15:21:00 +0200 (CEST) Received: from mail.etit.hu ([127.0.0.1]) by localhost (mail.etit.hu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id rw4mKbFIvjNZ for ; Fri, 25 Sep 2020 15:20:54 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by mail.etit.hu (Postfix) with ESMTP id 19B9E329ECB for ; Fri, 25 Sep 2020 15:20:54 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.etit.hu 19B9E329ECB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=etit.hu; s=DB188746-8E1A-11E9-A044-ADBC3E5C42AB; t=1601040054; bh=RxdnTPIx0JRRIMcXukNk+OdQvVJgPdJFKHrxU9CgqcM=; h=To:From:Message-ID:Date:MIME-Version; b=fxFzJbTnqZIpCvX90F2hvWe5+HNUdD47CQ4hLWMT21bkzN24S3WIQjTIGHiI+w/Mg jzi5dkmLm/TL1My/V8VBiv//malDcMZt3i9Y4+agsvAkvUMA9TGaIdah6bbd1epopm Q4qPY4nts27ftvr+f55h86Lgk/vfrxkAzUIcFNDv1GGzV8YENUSIdzJ2bReBUfu6mZ aP3n7SB86KqHxUuijj+5CWbcFM6aaSdvWSxBjDA2rv0C0oEdOYuueCd5cjhYWCDTzc fTQpgLEozzgfH+mL9PfFjAcj7JnHcydNWv09NltZuKACTFuimqbZZfEet0WhU0QuNq L+u5l798OPDWA== X-Virus-Scanned: amavisd-new at etit.hu Received: from mail.etit.hu ([127.0.0.1]) by localhost (mail.etit.hu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id eJ1IR-f2ogmr for ; Fri, 25 Sep 2020 15:20:54 +0200 (CEST) Received: from [192.168.100.20] (catv-80-99-211-23.catv.broadband.hu [80.99.211.23]) by mail.etit.hu (Postfix) with ESMTPSA id DBDFA32672C for ; Fri, 25 Sep 2020 15:20:53 +0200 (CEST) To: "xen-users@lists.xenproject.org" From: =?UTF-8?B?w4lsacOhcyBUYW3DoXM=?= Subject: XEN 4.12, redirect tape drive to domu Message-ID: Date: Fri, 25 Sep 2020 15:20:53 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-2; format=flowed Content-Language: hu-HU Content-Transfer-Encoding: quoted-printable X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" Dear all. I have an ubuntu 18.04LTS DOM0 with XEN 4.12 installed, and several PV=20 domUs (mainly ubuntu linux). In the dom0, I have a tape drive installed: st 4:0:6:0: Attached scsi tape st0 This is a good old HP DAT 72 SCSI tape drive. From the dom0, I can access the tape drive, no problem, but it woudl be=20 more conveniant if I could access it directly form one of the domus. The scsi card is a very old Adaptec AIC-7892A U160/m from the late 90s,=20 so it does not support any virtualization specific helpers. My question is, should it be possible to passthrough this tape drive, or=20 the complete scsi card sitting on the pci (due to it's only aim is to=20 provide access to the tape), somehow? Are there any specialities? --=20 =C9li=E1s Tam=E1s Thomas Elias ETIT[nwpro] KFT, =DCgyvezet=F5-H=E1l=F3zatbiztons=E1gi specialista ETIT[nwpro] Ltd, General Manager-Network security specialist Tel. HU: +36/30-497-1626 OpenPGP pubkey: http://etit.hu/doc/et-pub.asc Okleveles m=E9rn=F6k-informatikus (MSC) Master of Science in Information Technology (MSC) Licenced Penetration Tester (TM15-047) Kapcsolat: http://etit.hu/index.php/hu/kapcsolat Jogi nyilatkozat: http://etit.hu/disclaimer-email-hu.txt Contact: http://etit.hu/index.php/en/contact Disclaimer: http://etit.hu/disclaimer-email-en.txt From xen-users-bounces@lists.xenproject.org Mon Sep 28 08:37:30 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 28 Sep 2020 08:37:30 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kModd-0006sd-QK; Mon, 28 Sep 2020 08:36:01 +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 4.92) (envelope-from ) id 1kModc-0006sY-2A for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 08:36:00 +0000 X-Inumbo-ID: 5541f530-de99-4dd7-af6c-f7c910ba13d3 Received: from mail.syndicat.com (unknown [62.146.89.62]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id 5541f530-de99-4dd7-af6c-f7c910ba13d3; Mon, 28 Sep 2020 08:35:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=syndicat.com; s=x; h=Content-Type:Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:To:From:Sender:Reply-To:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=8scl3wgSDxRIaJ//aKKLejB0Gd8ZZxJp+H/Vg4n8A3k=; b=o7WK88JrhekcjrUIWntCYUXYO9 F1bm9qmrMJP/6/dLEa2/kqwZc8Weo1nsxZHHPJGCkseoquJzljKci5GOYjFtrdyLwskf4ew0p76Ym dPOquRBNrWy9MAE4u8Evl/TpHYcAaIrQYje2PhP7fGUH0kOFgBySJKJjf/DaCk2Grl98=; Received: from localhost.syndicat.com ([127.0.0.1]:58273 helo=localhost) by mail.syndicat.com with esmtp (Syndicat PostHamster 11.1 4.94) (envelope-from ) id 1kModY-0005HL-CB for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 10:35:56 +0200 X-Virus-Scanned: amavisd-new at syndicat.com Received: from mail.syndicat.com ([127.0.0.1]) by localhost (mail.syndicat.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3bEeSev-558M for ; Mon, 28 Sep 2020 10:35:56 +0200 (CEST) Received: from p54b2eaeb.dip0.t-ipconnect.de ([84.178.234.235]:56108 helo=gongo.localnet) by mail.syndicat.com with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Syndicat PostHamster 11.1 4.94) (envelope-from ) id 1kModX-00006t-Vq for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 10:35:56 +0200 From: Niels Dettenbach To: xen-users@lists.xenproject.org Subject: Re: XEN 4.12, redirect tape drive to domu Date: Mon, 28 Sep 2020 10:36:02 +0200 Message-ID: <2178674.ElGaqSPkdT@gongo> Organization: Syndicat IT&Internet In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1" X-Report-Abuse-To: abuse@syndicat.com (see https://www.syndicat.com/kontakt/kontakte/) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - mail.syndicat.com X-AntiAbuse: Original Domain - lists.xenproject.org X-AntiAbuse: Sender Address Domain - syndicat.com X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" Am Freitag, 25. September 2020, 15:20:53 CEST schrieb =C9li=E1s Tam=E1s: > My question is, should it be possible to passthrough this tape drive, or > the complete scsi card sitting on the pci (due to it's only aim is to > provide access to the tape), somehow? Are there any specialities? hmm, if just one DomU should gain access to that PCI device, PCI passthrough may= =20 work, but if you want to use it from different DomU things may get=20 complicated, because only one DomU at a time should get access to it. If xe= n=20 allows to attach tape scsci devices (never tried it) this may be a way to=20 instead. If you want to use it i.e., for a daily/nightly backup of all DomU, PCI=20 hotplug and PCI attach (or storage device attach/detach iif it works with=20 tape) may be way to "connect" -> backup -> "disconnect" to the volumes of=20 each DomU. I wrote a xenbackup tool (shell scripts) for Dom0 side backup of LVM based= =20 DomU storages (with snapshots) - by default for backup-manager, but it may = be=20 a base to adapt it to your "batch" application with PCI passthrough and som= e=20 ssh command to do the backup "from within" the DomUs if you need that. https://www.syndicat.com/open_source/projekte/xenbackup/ https://github.com/nielsd/xen-host-allbackup you would have to adapt the snaps_backup_mount / snaps_backup_umount scripts DomUs/storages could be configured in: /etc/xenback_vols hth, niels. =2D-=20 --- Niels Dettenbach Syndicat IT & Internet http://www.syndicat.com PGP: https://syndicat.com/pub_key.asc --- =20 From xen-users-bounces@lists.xenproject.org Mon Sep 28 09:06:07 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 28 Sep 2020 09:06:07 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMp60-0001If-U7; Mon, 28 Sep 2020 09:05:20 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMp5y-0001IZ-FZ for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 09:05:19 +0000 X-Inumbo-ID: d397110e-9781-4196-8c5a-a15ea706a61f Received: from mail.etit.hu (unknown [45.67.159.4]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id d397110e-9781-4196-8c5a-a15ea706a61f; Mon, 28 Sep 2020 09:05:08 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mail.etit.hu (Postfix) with ESMTP id D7CA5327ECE for ; Mon, 28 Sep 2020 11:05:06 +0200 (CEST) Received: from mail.etit.hu ([127.0.0.1]) by localhost (mail.etit.hu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id l9ni-XwxLLJ1 for ; Mon, 28 Sep 2020 11:05:02 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by mail.etit.hu (Postfix) with ESMTP id 6870B327EC1 for ; Mon, 28 Sep 2020 11:05:02 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.etit.hu 6870B327EC1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=etit.hu; s=DB188746-8E1A-11E9-A044-ADBC3E5C42AB; t=1601283902; bh=lFfq5XZMmw1huUHpQfMeXVAghb2YJ5+wM0UF4KwWhyY=; h=To:From:Message-ID:Date:MIME-Version; b=k+Hd7ORJDlnMUJRpfqSTzYEIVNtX6C/nIrDJ3mzs0P6ojCTn4BlqVnQGhxlgrtDJU z38mwPMf4PBn9Efa6d3V+ppgnosEn13k5FtQR3TvcH6IltjREUtZ87I26RjJdSzRsV PJEFjTsQw4WrxQ2g8NjaWbQ7RpqywsyUHmUacYB9c6ir8noXlo6AvdY7e/HgGWiief xInitOYL/89skmedH8KR82PgUbavFFq2m21R0/fqgrddyP0C9lHUFYdEjhpACQxTS3 5pGS6AH71KXyddB+0deJy3Co044gzaX3Hce/EnK3Vt3BKosv3hf8uaa8opsNgvxQcL /Cic4XpTHeDpA== X-Virus-Scanned: amavisd-new at etit.hu Received: from mail.etit.hu ([127.0.0.1]) by localhost (mail.etit.hu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 6Qrek7bwPWoA for ; Mon, 28 Sep 2020 11:05:02 +0200 (CEST) Received: from [192.168.100.20] (catv-80-99-211-23.catv.broadband.hu [80.99.211.23]) by mail.etit.hu (Postfix) with ESMTPSA id 40FFB327EB7 for ; Mon, 28 Sep 2020 11:05:02 +0200 (CEST) Subject: Re: XEN 4.12, redirect tape drive to domu To: xen-users@lists.xenproject.org References: <2178674.ElGaqSPkdT@gongo> From: =?UTF-8?B?w4lsacOhcyBUYW3DoXM=?= Message-ID: <0cb8a41b-8291-a327-eec0-019e57353c13@etit.hu> Date: Mon, 28 Sep 2020 11:05:01 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <2178674.ElGaqSPkdT@gongo> Content-Type: text/plain; charset=iso-8859-2; format=flowed Content-Language: hu-HU Content-Transfer-Encoding: quoted-printable X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" Hi! Thank you for the responses. At the moment when I'm using PCI=20 passthorugh I receive the follwoing error: [ 17.592149] scsi 4:0:6:0: Sequential-Access IBM DDS Gen5=20 A1B0 PQ: 0 ANSI: 3 [ 17.607179] scsi target4:0:6: Beginning Domain Validation [ 17.612790] scsi target4:0:6: wide asynchronous [ 17.616625] scsi target4:0:6: FAST-20 WIDE SCSI 40.0 MB/s ST (50 ns,=20 offset 32) [ 17.619668] scsi target4:0:6: Domain Validation skipping write tests [ 17.619670] scsi target4:0:6: Ending Domain Validation [ 19.677562] scsi 4:0:6:0: Attached scsi generic sg9 type 1 [ 19.683814] st: Version 20160209, fixed bufsize 32768, s/g segs 256 [ 19.685623] st 4:0:6:0: Attached scsi tape st0 [ 19.685626] st 4:0:6:0: st0: try direct i/o: yes (alignment 4 B) [19057.309731] st 4:0:6:0: Power-on or device reset occurred [19121.837625] st 4:0:6:0: [st0] Block limits 1 - 16777215 bytes. [20183.205282] INFO: task mt:12738 blocked for more than 120 seconds. [20183.205408] Not tainted 5.4.0-48-generic #52~18.04.1-Ubuntu [20183.205516] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs"=20 disables this message. [20183.205644] mt D 0 12738 12736 0x00000000 [20183.205649] Call Trace: [20183.205668] __schedule+0x293/0x720 [20183.205672] schedule+0x33/0xa0 [20183.205675] schedule_timeout+0x1d3/0x320 [20183.205684] ? __blk_mq_delay_run_hw_queue+0x107/0x160 [20183.205687] ? blk_mq_run_hw_queue+0x56/0x100 [20183.205690] wait_for_completion+0xba/0x140 [20183.205696] ? wake_up_q+0x80/0x80 [20183.205704] st_do_scsi.constprop.29+0x37f/0x420 [st] [20183.205707] st_int_ioctl+0x28f/0xf80 [st] [20183.205711] ? st_int_ioctl+0x28f/0xf80 [st] [20183.205714] st_ioctl+0x6b4/0x1770 [st] [20183.205721] ? _copy_to_user+0x26/0x30 [20183.205728] ? cp_new_stat+0x152/0x180 [20183.205732] do_vfs_ioctl+0xa9/0x640 [20183.205735] ? __do_sys_newfstat+0x44/0x70 [20183.205738] ksys_ioctl+0x75/0x80 [20183.205740] __x64_sys_ioctl+0x1a/0x20 [20183.205747] do_syscall_64+0x57/0x190 [20183.205749] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [20183.205753] RIP: 0033:0x7fc44fdca6d7 [20183.205777] Code: Bad RIP value. [20183.205779] RSP: 002b:00007ffc346c4f78 EFLAGS: 00000246 ORIG_RAX:=20 0000000000000010 [20183.205781] RAX: ffffffffffffffda RBX: 00007ffc346c5802 RCX:=20 00007fc44fdca6d7 [20183.205783] RDX: 00007ffc346c4f80 RSI: 0000000040086d01 RDI:=20 0000000000000003 [20183.205784] RBP: 00007ffc346c5802 R08: 0000000000000000 R09:=20 0000000000000000 [20183.205785] R10: 0000000000000000 R11: 0000000000000246 R12:=20 00005578d705fcf0 [20183.205787] R13: 00007ffc346c50a0 R14: 0000000000000000 R15:=20 0000000000000000 [20185.674286] st 4:0:6:0: [st0] Sense Key : Medium Error [current] [20185.674291] st 4:0:6:0: [st0] Add. Sense: Excessive write errors If I reboot the system, tape drive works from dom0, but I get the above=20 message from domu. I guess there should be some kind of fine-tuning=20 available for pci passthrough? I admint the pci device is an old one, it does not even supports=20 function level reset: 29:01.0 SCSI storage controller: Adaptec AIC-7892A U160/m (rev 02) Subsystem: Adaptec 29160 Ultra160 SCSI Controller Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop-=20 ParErr+ Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=3Dmedium=20 >TAbort- SERR- Using new ACK method (XEN) Allocated console ring of 16 KiB. (XEN) VMX: Supported advanced features: (XEN) - APIC MMIO access virtualisation (XEN) - APIC TPR shadow (XEN) - Extended Page Tables (EPT) (XEN) - Virtual-Processor Identifiers (VPID) (XEN) - Virtual NMI (XEN) - MSR direct-access bitmap (XEN) HVM: ASIDs enabled. (XEN) VMX: Disabling executable EPT superpages due to CVE-2018-12207 (XEN) HVM: VMX enabled (XEN) HVM: Hardware Assisted Paging (HAP) detected (XEN) HVM: HAP page sizes: 4kB, 2MB [ 0.000000] DMI: IBM IBM System x3400 M3 Server -[7379KTG]-/69Y4356,=20 BIOS -[Y4E159AUS-1.14]- 05/06/2013 2020. 09. 28. 10:36 keltez=E9ssel, Niels Dettenbach =EDrta: > Am Freitag, 25. September 2020, 15:20:53 CEST schrieb =C9li=E1s Tam=E1s= : >> My question is, should it be possible to passthrough this tape drive, = or >> the complete scsi card sitting on the pci (due to it's only aim is to >> provide access to the tape), somehow? Are there any specialities? > hmm, > if just one DomU should gain access to that PCI device, PCI passthrough= may > work, but if you want to use it from different DomU things may get > complicated, because only one DomU at a time should get access to it. I= f xen > allows to attach tape scsci devices (never tried it) this may be a way = to > instead. >=20 > If you want to use it i.e., for a daily/nightly backup of all DomU, PCI > hotplug and PCI attach (or storage device attach/detach iif it works wi= th > tape) may be way to "connect" -> backup -> "disconnect" to the volumes = of > each DomU. >=20 > I wrote a xenbackup tool (shell scripts) for Dom0 side backup of LVM ba= sed > DomU storages (with snapshots) - by default for backup-manager, but it = may be > a base to adapt it to your "batch" application with PCI passthrough and= some > ssh command to do the backup "from within" the DomUs if you need that. >=20 > https://www.syndicat.com/open_source/projekte/xenbackup/ > https://github.com/nielsd/xen-host-allbackup >=20 > you would have to adapt the snaps_backup_mount / snaps_backup_umount sc= ripts >=20 > DomUs/storages could be configured in: > /etc/xenback_vols >=20 >=20 >=20 > hth, >=20 >=20 > niels. >=20 --=20 =C9li=E1s Tam=E1s Thomas Elias ETIT[nwpro] KFT, =DCgyvezet=F5-H=E1l=F3zatbiztons=E1gi specialista ETIT[nwpro] Ltd, General Manager-Network security specialist Tel. HU: +36/30-497-1626 OpenPGP pubkey: http://etit.hu/doc/et-pub.asc Okleveles m=E9rn=F6k-informatikus (MSC) Master of Science in Information Technology (MSC) Licenced Penetration Tester (TM15-047) Kapcsolat: http://etit.hu/index.php/hu/kapcsolat Jogi nyilatkozat: http://etit.hu/disclaimer-email-hu.txt Contact: http://etit.hu/index.php/en/contact Disclaimer: http://etit.hu/disclaimer-email-en.txt From xen-users-bounces@lists.xenproject.org Mon Sep 28 09:11:49 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 28 Sep 2020 09:11:49 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMpC0-0002It-02; Mon, 28 Sep 2020 09:11:32 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMpBz-0002If-0c for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 09:11:31 +0000 X-Inumbo-ID: 2e2fc237-b198-4d89-8c22-68da1562b1e0 Received: from mail.syndicat.com (unknown [62.146.89.62]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 2e2fc237-b198-4d89-8c22-68da1562b1e0; Mon, 28 Sep 2020 09:11:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=syndicat.com; s=x; h=Content-Type:Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=GZLSpXFlSq9dn+QL+uMeASgaKt7BHlO9IlOyIN2m8wk=; b=io4i1wnWV+clqjqTe9DWfyj8gA PAtc4usZRsgpMxMA/RzXQYa9aBfWpIOiTw+vLn25fSh8kl+w58gq/sNOzBjby0GfWkEhtqc7jlkP5 FyF7xLl1oeSIdcq+6nopec0MxgUAOQlgphYSu8i097FjsFesv+ngeaZNHGaBBcw6pTOo=; Received: from localhost.syndicat.com ([127.0.0.1]:57304 helo=localhost) by mail.syndicat.com with esmtp (Syndicat PostHamster 11.1 4.94) (envelope-from ) id 1kMpBw-0006dW-JG; Mon, 28 Sep 2020 11:11:28 +0200 X-Virus-Scanned: amavisd-new at syndicat.com Received: from mail.syndicat.com ([127.0.0.1]) by localhost (mail.syndicat.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HLkVcZ8vcTHZ; Mon, 28 Sep 2020 11:11:28 +0200 (CEST) Received: from p54b2eaeb.dip0.t-ipconnect.de ([84.178.234.235]:57134 helo=gongo.localnet) by mail.syndicat.com with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Syndicat PostHamster 11.1 4.94) (envelope-from ) id 1kMpBw-0003at-7m; Mon, 28 Sep 2020 11:11:28 +0200 From: Niels Dettenbach To: xen-users@lists.xenproject.org Cc: =?ISO-8859-1?Q?=C9li=E1s_Tam=E1s?= Subject: Re: XEN 4.12, redirect tape drive to domu Date: Mon, 28 Sep 2020 11:11:34 +0200 Message-ID: <2560863.mvXUDI8C0e@gongo> Organization: Syndicat IT&Internet In-Reply-To: <0cb8a41b-8291-a327-eec0-019e57353c13@etit.hu> References: <2178674.ElGaqSPkdT@gongo> <0cb8a41b-8291-a327-eec0-019e57353c13@etit.hu> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1" X-Report-Abuse-To: abuse@syndicat.com (see https://www.syndicat.com/kontakt/kontakte/) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - mail.syndicat.com X-AntiAbuse: Original Domain - lists.xenproject.org X-AntiAbuse: Sender Address Domain - syndicat.com X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" Am Montag, 28. September 2020, 11:05:01 CEST schrieb =C9li=E1s Tam=E1s: > [20183.205282] INFO: task mt:12738 blocked for more than 120 seconds. > [20183.205408] Not tainted 5.4.0-48-generic #52~18.04.1-Ubuntu > [20183.205516] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" > disables this message. just shot in the dark: did you tried that advice? =2D-=20 --- Niels Dettenbach Syndicat IT & Internet http://www.syndicat.com PGP: https://syndicat.com/pub_key.asc --- =20 From xen-users-bounces@lists.xenproject.org Mon Sep 28 09:20:41 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 28 Sep 2020 09:20:41 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMpKW-0003MS-01; Mon, 28 Sep 2020 09:20:20 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMpKU-0003MN-SU for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 09:20:18 +0000 X-Inumbo-ID: dd91ae7a-9e6e-4856-9c9d-375b8993b645 Received: from mail.etit.hu (unknown [45.67.159.4]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id dd91ae7a-9e6e-4856-9c9d-375b8993b645; Mon, 28 Sep 2020 09:20:14 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mail.etit.hu (Postfix) with ESMTP id D3E1D327F0A; Mon, 28 Sep 2020 11:20:13 +0200 (CEST) Received: from mail.etit.hu ([127.0.0.1]) by localhost (mail.etit.hu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id rKDnZhk59MhZ; Mon, 28 Sep 2020 11:20:06 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by mail.etit.hu (Postfix) with ESMTP id 981D6327F63; Mon, 28 Sep 2020 11:20:06 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.etit.hu 981D6327F63 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=etit.hu; s=DB188746-8E1A-11E9-A044-ADBC3E5C42AB; t=1601284806; bh=Rmv6pB1DUSkgC8B4meFNtcCAWrHHoD0Ehj1M2OzNbCc=; h=To:From:Message-ID:Date:MIME-Version; b=g2XFZsidDZkw8Kgmk3iC1T3HPKUpGxtylY2bJuMGRM4pGDPLJvDYX/isMqxorCRI5 JopNB9z3yBv/ciLc79XVj+QqaGytzucESfgBpNI0E5dEsR0+K+Vd2ko7zcgLwE95W0 z+rpZxF93sOHWaxilBurZ2YjyujmbTb/7cvvfXjEGu6RmP046KIe5JQ4Tf/x2bjBHd VuChpf34ULTb7ut4u36zAqLKXWqAJ+SCIj+4QyhsToyXtDzvWwu3mWb3jmv2OZv6q9 1oe24RWwEug8JihWOiX+MBRrgUFRUgUxH223kxGVq5I+275h0A6m06P9NKpLqCXVre Od5EMD/c0tPew== X-Virus-Scanned: amavisd-new at etit.hu Received: from mail.etit.hu ([127.0.0.1]) by localhost (mail.etit.hu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 7r4mf3ZEyvxb; Mon, 28 Sep 2020 11:20:06 +0200 (CEST) Received: from [192.168.100.20] (catv-80-99-211-23.catv.broadband.hu [80.99.211.23]) by mail.etit.hu (Postfix) with ESMTPSA id 5FE0E327F62; Mon, 28 Sep 2020 11:20:06 +0200 (CEST) Subject: Re: XEN 4.12, redirect tape drive to domu To: Niels Dettenbach , xen-users@lists.xenproject.org References: <2178674.ElGaqSPkdT@gongo> <0cb8a41b-8291-a327-eec0-019e57353c13@etit.hu> <2560863.mvXUDI8C0e@gongo> From: =?UTF-8?B?w4lsacOhcyBUYW3DoXM=?= Message-ID: <2408cbe2-c947-272a-7738-fb20565baefa@etit.hu> Date: Mon, 28 Sep 2020 11:20:05 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <2560863.mvXUDI8C0e@gongo> Content-Type: text/plain; charset=iso-8859-2; format=flowed Content-Language: hu-HU Content-Transfer-Encoding: quoted-printable X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" Nope, due to as per my previous experience it does not resolve anything,=20 you just cannot see that there is a problem... :) A "rewind" command=20 should not take more than 120 seconds anyway, for a casette that is=20 already at it's beginning... The command by the way does not goes in to=20 the device, due to it is not trying to rewind the tape (it does nothing). 2020. 09. 28. 11:11 keltez=E9ssel, Niels Dettenbach =EDrta: > Am Montag, 28. September 2020, 11:05:01 CEST schrieb =C9li=E1s Tam=E1s: >> [20183.205282] INFO: task mt:12738 blocked for more than 120 seconds. >> [20183.205408] Not tainted 5.4.0-48-generic #52~18.04.1-Ubuntu >> [20183.205516] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" >> disables this message. > just shot in the dark: did you tried that advice? >=20 --=20 =C9li=E1s Tam=E1s Thomas Elias ETIT[nwpro] KFT, =DCgyvezet=F5-H=E1l=F3zatbiztons=E1gi specialista ETIT[nwpro] Ltd, General Manager-Network security specialist Tel. HU: +36/30-497-1626 OpenPGP pubkey: http://etit.hu/doc/et-pub.asc Okleveles m=E9rn=F6k-informatikus (MSC) Master of Science in Information Technology (MSC) Licenced Penetration Tester (TM15-047) Kapcsolat: http://etit.hu/index.php/hu/kapcsolat Jogi nyilatkozat: http://etit.hu/disclaimer-email-hu.txt Contact: http://etit.hu/index.php/en/contact Disclaimer: http://etit.hu/disclaimer-email-en.txt From xen-users-bounces@lists.xenproject.org Mon Sep 28 09:30:07 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 28 Sep 2020 09:30:07 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMpTa-0003hm-1x; Mon, 28 Sep 2020 09:29:42 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMpTY-0003hg-NB for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 09:29:40 +0000 X-Inumbo-ID: 307910df-0995-4eaa-838b-be4f9476dd9e Received: from mail.syndicat.com (unknown [62.146.89.62]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 307910df-0995-4eaa-838b-be4f9476dd9e; Mon, 28 Sep 2020 09:29:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=syndicat.com; s=x; h=Content-Type:Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:To:From:Sender:Reply-To:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=hjCpPaFVyOpwleOIjs7mq1gm5UsRlWg+SPi/rH/UsHc=; b=UKjO8feXuXyuqAmiJT41BGof8T ya5AZNMHkyqaI3xFSq4Yo/L8NEu3+aACLykcF/aRIMQ/gz4oA/EQNTRl8QoweiH4rHIpLnySb+a6V Enf0xsqj2o4H+lMPh6ZyJ/xZpex5FBkslUi4wbab5gRg6djOFRwV01w9A9Ii/LT1etPQ=; Received: from localhost.syndicat.com ([127.0.0.1]:56884 helo=localhost) by mail.syndicat.com with esmtp (Syndicat PostHamster 11.1 4.94) (envelope-from ) id 1kMpTW-0003x8-CN for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 11:29:38 +0200 X-Virus-Scanned: amavisd-new at syndicat.com Received: from mail.syndicat.com ([127.0.0.1]) by localhost (mail.syndicat.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0E2kmYyk0TiI for ; Mon, 28 Sep 2020 11:29:38 +0200 (CEST) Received: from p54b2eaeb.dip0.t-ipconnect.de ([84.178.234.235]:57396 helo=gongo.localnet) by mail.syndicat.com with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Syndicat PostHamster 11.1 4.94) (envelope-from ) id 1kMpTW-0006hD-0g for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 11:29:38 +0200 From: Niels Dettenbach To: xen-users@lists.xenproject.org Subject: Re: XEN 4.12, redirect tape drive to domu Date: Mon, 28 Sep 2020 11:29:44 +0200 Message-ID: <3088586.44csPzL39Z@gongo> Organization: Syndicat IT&Internet In-Reply-To: <2408cbe2-c947-272a-7738-fb20565baefa@etit.hu> References: <2560863.mvXUDI8C0e@gongo> <2408cbe2-c947-272a-7738-fb20565baefa@etit.hu> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1" X-Report-Abuse-To: abuse@syndicat.com (see https://www.syndicat.com/kontakt/kontakte/) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - mail.syndicat.com X-AntiAbuse: Original Domain - lists.xenproject.org X-AntiAbuse: Sender Address Domain - syndicat.com X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" Am Montag, 28. September 2020, 11:20:05 CEST schrieb =C9li=E1s Tam=E1s: > Nope, due to as per my previous experience it does not resolve anything, > you just cannot see that there is a problem... A "rewind" command > should not take more than 120 seconds anyway, for a casette that is > already at it's beginning... The command by the way does not goes in to > the device, due to it is not trying to rewind the tape (it does nothing). =2E..thought something similiar, but sometimes such advices are bit unclear= =2E=20 To me it seems like some "timeout" in a regarding subsystem (scsi driver?),= =20 but my scope ends here too =DF). did you read this? https://wiki.xenproject.org/wiki/Paravirtualized_SCSI =2D-=20 --- Niels Dettenbach Syndicat IT & Internet http://www.syndicat.com PGP: https://syndicat.com/pub_key.asc --- =20 From xen-users-bounces@lists.xenproject.org Mon Sep 28 09:47:59 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 28 Sep 2020 09:47:59 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMpka-0005ip-Dj; Mon, 28 Sep 2020 09:47:16 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMpkY-0005ik-PQ for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 09:47:14 +0000 X-Inumbo-ID: 4695bdc5-42ad-47f0-9113-b55fed1c6cb5 Received: from mail.etit.hu (unknown [45.67.159.4]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 4695bdc5-42ad-47f0-9113-b55fed1c6cb5; Mon, 28 Sep 2020 09:47:10 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mail.etit.hu (Postfix) with ESMTP id 547EF327F18 for ; Mon, 28 Sep 2020 11:47:09 +0200 (CEST) Received: from mail.etit.hu ([127.0.0.1]) by localhost (mail.etit.hu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id UNBYVILmeviI for ; Mon, 28 Sep 2020 11:47:07 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by mail.etit.hu (Postfix) with ESMTP id 53E10327FB0 for ; Mon, 28 Sep 2020 11:47:07 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.etit.hu 53E10327FB0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=etit.hu; s=DB188746-8E1A-11E9-A044-ADBC3E5C42AB; t=1601286427; bh=z3cfW0D/TkofkOkaD4WfX+xaaENRa1fIuyN1YKmocTA=; h=To:From:Message-ID:Date:MIME-Version; b=ci0p6rYXdAHP0g9bk2WC7ltDM0ByIvEbzyLF7Nvmo8gviCulHrn3JSs1p5QCHe3Yz 1bC5C2BqhKqzocC6ut4PG05+dMuvzRNULx0d3UUv3mTl7b0H0IW6GMKr3S1iFWoWz6 dNyUG0Z/rTGLbQ0b13Wwg1etcp0bckspUxuO3qaSOZ26+3mmPTmoOQMm3t+gdew0eQ ajTEnXdzW85IB4npuERSKWA2QP35YNeokD/8JIUtBjRGiTOYgaXIr2jw5aybeea1zK 3RNjEFTgwoPeBHOyCuWS7PJ7znM0q5wnVH0qTJwPlXxd86b+Z6g8oPkHojc9Orx0cq Cc4jF0rfCkyog== X-Virus-Scanned: amavisd-new at etit.hu Received: from mail.etit.hu ([127.0.0.1]) by localhost (mail.etit.hu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 7Ks5Rmy81WK9 for ; Mon, 28 Sep 2020 11:47:07 +0200 (CEST) Received: from [10.111.10.12] (catv-80-99-211-23.catv.broadband.hu [80.99.211.23]) by mail.etit.hu (Postfix) with ESMTPSA id 2E8EF327F18 for ; Mon, 28 Sep 2020 11:47:07 +0200 (CEST) Subject: Re: XEN 4.12, redirect tape drive to domu To: xen-users@lists.xenproject.org References: <2560863.mvXUDI8C0e@gongo> <2408cbe2-c947-272a-7738-fb20565baefa@etit.hu> <3088586.44csPzL39Z@gongo> From: =?UTF-8?B?w4lsacOhcyBUYW3DoXM=?= Message-ID: <51673acb-b9ad-257f-c642-2bb71f599d0c@etit.hu> Date: Mon, 28 Sep 2020 11:47:06 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <3088586.44csPzL39Z@gongo> Content-Type: text/plain; charset=iso-8859-2; format=flowed Content-Language: hu-HU Content-Transfer-Encoding: quoted-printable X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" Hi. Thank you for bringing this into my attention. I will try this one=20 during the next "playtime window". :) > did you read this? > https://wiki.xenproject.org/wiki/Paravirtualized_SCSI >=20 --=20 =C9li=E1s Tam=E1s Thomas Elias ETIT[nwpro] KFT, =DCgyvezet=F5-H=E1l=F3zatbiztons=E1gi specialista ETIT[nwpro] Ltd, General Manager-Network security specialist Tel. HU: +36/30-497-1626 OpenPGP pubkey: http://etit.hu/doc/et-pub.asc Okleveles m=E9rn=F6k-informatikus (MSC) Master of Science in Information Technology (MSC) Licenced Penetration Tester (TM15-047) Kapcsolat: http://etit.hu/index.php/hu/kapcsolat Jogi nyilatkozat: http://etit.hu/disclaimer-email-hu.txt Contact: http://etit.hu/index.php/en/contact Disclaimer: http://etit.hu/disclaimer-email-en.txt From xen-users-bounces@lists.xenproject.org Mon Sep 28 10:31:36 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 28 Sep 2020 10:31:36 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMqQH-0001zl-9a; Mon, 28 Sep 2020 10:30:21 +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 4.92) (envelope-from ) id 1kMqQF-0001zg-VS for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 10:30:20 +0000 X-Inumbo-ID: e1451840-13ac-438d-a06e-4e230708f381 Received: from mx2.isp.ktk.de (unknown [82.115.96.229]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id e1451840-13ac-438d-a06e-4e230708f381; Mon, 28 Sep 2020 10:30:17 +0000 (UTC) Received: from donald.local (p57b642a5.dip0.t-ipconnect.de [87.182.66.165]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx2.isp.ktk.de (Postfix) with ESMTPSA id 4C0JgW52XDz10fG for ; Mon, 28 Sep 2020 12:30:15 +0200 (CEST) Received: from [192.168.1.13] (work.donald.local [192.168.1.13]) by donald.local (Postfix) with ESMTP id C10B3A089C for ; Mon, 28 Sep 2020 12:10:08 +0200 (CEST) Subject: Re: XEN 4.12, redirect tape drive to domu To: "xen-users@lists.xenproject.org" References: <2560863.mvXUDI8C0e@gongo> <2408cbe2-c947-272a-7738-fb20565baefa@etit.hu> <3088586.44csPzL39Z@gongo> From: "Manfred Haertel, DB3HM" Message-ID: Date: Mon, 28 Sep 2020 12:10:08 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0 SeaMonkey/2.49.4 MIME-Version: 1.0 In-Reply-To: <3088586.44csPzL39Z@gongo> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" Niels Dettenbach schrieb: > did you read this? > https://wiki.xenproject.org/wiki/Paravirtualized_SCSI Does this really work? Last time I tried I got the impression that it does not. At least not in the case I tried (passing through a CD drive). -- Manfred Härtel, DB3HM mailto:Manfred.Haertel@rz-online.de http://rz-home.de/mhaertel From xen-users-bounces@lists.xenproject.org Mon Sep 28 11:56:46 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 28 Sep 2020 11:56:46 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMrlB-0002hv-FO; Mon, 28 Sep 2020 11:56:01 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMrlA-0002hq-D9 for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 11:56:00 +0000 X-Inumbo-ID: 24ca3745-4359-4d3b-9d78-c2533c73d76c Received: from mail.syndicat.com (unknown [62.146.89.62]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 24ca3745-4359-4d3b-9d78-c2533c73d76c; Mon, 28 Sep 2020 11:55:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=syndicat.com; s=x; h=Content-Type:Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:To:From:Sender:Reply-To:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=C2DJ0RzPDD3qgi1k6ECmGfIz5eNnvnDqgG0N4K1aDeo=; b=Ow28xEzGfNP7m+I34keKe746AU S1ZEjY/X8LuurH/D1jdpItZYkCh1R5arpL2/L/c1VxnLOQLrENkLzOiKmrxu3ZwVOYYqf+3+RbPeT pPCAgatnjDCvv6CEGzWOdsq9oM5iWbq4ReMFyfg4MT1sw0mYK5qdaXwMP9eA63HOUdA0=; Received: from localhost.syndicat.com ([127.0.0.1]:53736 helo=localhost) by mail.syndicat.com with esmtp (Syndicat PostHamster 11.1 4.94) (envelope-from ) id 1kMrl7-0006KJ-U8 for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 13:55:57 +0200 X-Virus-Scanned: amavisd-new at syndicat.com Received: from mail.syndicat.com ([127.0.0.1]) by localhost (mail.syndicat.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Dy6KY29rhgoQ for ; Mon, 28 Sep 2020 13:55:57 +0200 (CEST) Received: from p54b2eaeb.dip0.t-ipconnect.de ([84.178.234.235]:59150 helo=gongo.localnet) by mail.syndicat.com with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Syndicat PostHamster 11.1 4.94) (envelope-from ) id 1kMrl7-0004jg-Iw for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 13:55:57 +0200 From: Niels Dettenbach To: xen-users@lists.xenproject.org Subject: Re: XEN 4.12, redirect tape drive to domu Date: Mon, 28 Sep 2020 13:56:04 +0200 Message-ID: <2900316.CbtlEUcBR6@gongo> Organization: Syndicat IT&Internet In-Reply-To: References: <3088586.44csPzL39Z@gongo> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1" X-Report-Abuse-To: abuse@syndicat.com (see https://www.syndicat.com/kontakt/kontakte/) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - mail.syndicat.com X-AntiAbuse: Original Domain - lists.xenproject.org X-AntiAbuse: Sender Address Domain - syndicat.com X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" Am Montag, 28. September 2020, 12:10:08 CEST schrieb Manfred Haertel, DB3HM: > Does this really work? Last time I tried I got the impression that it > does not. At least not in the case I tried (passing through a CD drive). Never used it productive byself, but expect it was (is) used with typical=20 SCSI stack (i.e. FC, iSCSI etc.) HA setups like here: http://www-archive.xenproject.org/files/xensummit_fall07/19_Matsumoto.pdf at least in that doc Fijutsu stated pvSCSCI as follows in a "older"=20 presentation: =2D-- snip --- =2D pvSCSI driver on driver domain is under evaluation. =2D=84 pvSCSI driver works on HVM domain and PV domain. =2D-- snap --- i.e. "current" 5.8.5 linux kernel states in "drivers/xen/Kconfig": =2D-- snip --- config XEN_SCSI_BACKEND =09 tristate "XEN SCSI backend driver" depends on XEN && XEN_BACKEND && TARGET_CORE The SCSI backend driver allows the kernel to export its SCSI Devices to oth= er=20 guests via a high-performance shared-memory interface. Only needed for systems running as XEN driver domains (e.g. Dom0) and if=20 guests need generic access to SCSI devices. =2D-- snap --- so i would give it a try...=DF) =2D-=20 --- Niels Dettenbach Syndicat IT & Internet http://www.syndicat.com PGP: https://syndicat.com/pub_key.asc --- =20 From xen-users-bounces@lists.xenproject.org Mon Sep 28 15:46:58 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 28 Sep 2020 15:46:58 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMvLa-0001mK-1o; Mon, 28 Sep 2020 15:45:50 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMsR6-0000Br-Nf for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 12:39:20 +0000 X-Inumbo-ID: d9236a71-6250-4b3c-b31f-2d2ed5a5d984 Received: from mail-ot1-x32c.google.com (unknown [2607:f8b0:4864:20::32c]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id d9236a71-6250-4b3c-b31f-2d2ed5a5d984; Mon, 28 Sep 2020 12:39:19 +0000 (UTC) Received: by mail-ot1-x32c.google.com with SMTP id g96so698909otb.12 for ; Mon, 28 Sep 2020 05:39:19 -0700 (PDT) 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 :cc; bh=yJuBp3Wk3Yp5q5FNpVjqVCzWJyzopGMNqPPejfKeaiE=; b=W41Cj9wFnXJ6ODl/wZewIv2prPQHzuCx0gu70/V6npqZrwvonLNYIHYbdjNZUzXMNA +CwtbhdZReirnj6vj8JkOe3X1oytgHiO+7NBFIJgW9zlKnWds5ejZn/lO+MQ2/sdmhjL vQs4dvBFGIsFkVtGkshcWsZypK5goRoaJPhHf9yzwNsgNE5sZISK8LhfSEDpQhbZY3S2 LcEUP82+5rLrDJCS/CE5qEfYsvO3aqwhHXsWhrfJkEfrk1XmQbdoIRymQQd0eeM5aTCs tqEkLocgKRfKkZTzL2MmSJPI1OLGz4s4AMSHYpH8dOQM5+QdDucTsgzHbJkuo5FNxU5W lSDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=yJuBp3Wk3Yp5q5FNpVjqVCzWJyzopGMNqPPejfKeaiE=; b=XEQmQzJowtCEvxqJoJzcKHdqtJkJzbxZo948+Kva5SBRWmFacd2LWU7lWMDVGlPX+Q Xa7atpCrd8jVEuaN/MBwOIkDn+nAcYVsUraQ4Z93UvSKRF7Ta7CmzNTINOUNQKRqFZhs FhqKbV8LyrW/xnvaJFqcK9Bm16aFmn1k0XLuEhZI4WVc+uOHFgoO9huWaMInvGAc7iVj 4dR+JR4g9E2z+jSavmtr27BVziBLDFz7h5lsheBk28F6Od+Af0zyNFfF+aiB2B+tLTKk fRQfmjCwHGvw57jk/MvQgHGi75V4yIcNp9Kl8RBE6CT1G8+RTeHP+P99iw8syzlUpv9j Iu7A== X-Gm-Message-State: AOAM530+krfbZp1qu7aEJr4lydOCKrs/axdeXGRucaCBzu5u2/AnMxw0 1argQ8yabWtpeB9DzQcO29b6XRUt6Ua+In0eejee38A0 X-Google-Smtp-Source: ABdhPJwtx5tYVfMls8w0wiuhUocN0rbH0DQaDLG9QgO2RCKLe4IySOomHGqqLmM6SgvmMm/+NXRQ2rFZHcWvvd1LnRc= X-Received: by 2002:a9d:6c4d:: with SMTP id g13mr760803otq.367.1601296759324; Mon, 28 Sep 2020 05:39:19 -0700 (PDT) MIME-Version: 1.0 References: <2560863.mvXUDI8C0e@gongo> <2408cbe2-c947-272a-7738-fb20565baefa@etit.hu> <3088586.44csPzL39Z@gongo> <51673acb-b9ad-257f-c642-2bb71f599d0c@etit.hu> In-Reply-To: <51673acb-b9ad-257f-c642-2bb71f599d0c@etit.hu> From: MrLovaskocsi2 Date: Mon, 28 Sep 2020 14:39:14 +0200 Message-ID: Subject: Re: XEN 4.12, redirect tape drive to domu To: =?UTF-8?B?w4lsacOhcyBUYW3DoXM=?= Cc: xen-users@lists.xenproject.org Content-Type: multipart/alternative; boundary="0000000000008502a605b05ef4ec" X-Mailman-Approved-At: Mon, 28 Sep 2020 15:45:49 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --0000000000008502a605b05ef4ec Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hi! You need to load the xen pci passtrough driver for the card in the dom0. So it is not supposed to work in dom0, if you want to pass it to a domU. Good luck! M On Mon, Sep 28, 2020, 11:49 =C3=89li=C3=A1s Tam=C3=A1s wrote: > Hi. > > Thank you for bringing this into my attention. I will try this one > during the next "playtime window". :) > > > did you read this? > > https://wiki.xenproject.org/wiki/Paravirtualized_SCSI > > > > > -- > > =C3=89li=C3=A1s Tam=C3=A1s > Thomas Elias > > ETIT[nwpro] KFT, =C3=9Cgyvezet=C5=91-H=C3=A1l=C3=B3zatbiztons=C3=A1gi spe= cialista > ETIT[nwpro] Ltd, General Manager-Network security specialist > > Tel. HU: +36/30-497-1626 > OpenPGP pubkey: http://etit.hu/doc/et-pub.asc > > Okleveles m=C3=A9rn=C3=B6k-informatikus (MSC) > Master of Science in Information Technology (MSC) > Licenced Penetration Tester (TM15-047) > > Kapcsolat: http://etit.hu/index.php/hu/kapcsolat > Jogi nyilatkozat: http://etit.hu/disclaimer-email-hu.txt > Contact: http://etit.hu/index.php/en/contact > Disclaimer: http://etit.hu/disclaimer-email-en.txt > > --0000000000008502a605b05ef4ec Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi!

You need= to load the xen pci passtrough driver for the card in the dom0. So it is n= ot supposed to work in dom0, if you want to pass it to a domU.
Good luck!

M<= /div>

On Mon, Sep 28, 2020, 11:49 =C3=89li=C3=A1s Tam=C3=A1s <et@etit.hu> wrote:
Hi.

Thank you for bringing this into my attention. I will try this one
during the next "playtime window". :)

> did you read this?
> https://wiki.xenproject.org/wi= ki/Paravirtualized_SCSI

>

--

=C3=89li=C3=A1s Tam=C3=A1s
Thomas Elias

ETIT[nwpro] KFT, =C3=9Cgyvezet=C5=91-H=C3=A1l=C3=B3zatbiztons=C3=A1gi speci= alista
ETIT[nwpro] Ltd, General Manager-Network security specialist

Tel. HU: +36/30-497-1626
OpenPGP pubkey: http://etit.hu/doc/et-pub.asc

Okleveles m=C3=A9rn=C3=B6k-informatikus (MSC)
Master of Science in Information Technology (MSC)
Licenced Penetration Tester (TM15-047)

Kapcsolat: http://etit.hu/index.php/hu/kapcsolat=
Jogi nyilatkozat: http://etit.hu/disclaimer-email-h= u.txt
Contact: http://etit.hu/index.php/en/contact
Disclaimer: http://etit.hu/disclaimer-email-en.txt<= /a>

--0000000000008502a605b05ef4ec-- From xen-users-bounces@lists.xenproject.org Mon Sep 28 15:46:58 2020 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Mon, 28 Sep 2020 15:46:58 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMvLP-0001kP-LO; Mon, 28 Sep 2020 15:45:39 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kMueE-0006FW-Hy for xen-users@lists.xenproject.org; Mon, 28 Sep 2020 15:01:02 +0000 X-Inumbo-ID: 7cadb982-8501-4608-a9b8-6428cd9d3129 Received: from mail-io1-xd2f.google.com (unknown [2607:f8b0:4864:20::d2f]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 7cadb982-8501-4608-a9b8-6428cd9d3129; Mon, 28 Sep 2020 15:01:01 +0000 (UTC) Received: by mail-io1-xd2f.google.com with SMTP id y13so1440914iow.4 for ; Mon, 28 Sep 2020 08:01:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=Faz0Cjh+rye9YmsaV6fkG66+jINf+cXn9/AJecX2Y/c=; b=NoUO+l1nvVdIG0taOGODWmGFt0XIxsprNcvR1cFrBa0r6V8HmTt5WNhI5nGQ4pOlqu 1GR8H7pSLFPHsVxskCnoej6bobX8RIIJhNge1K6TKA6sG1nKBpVGb1CuPzpv4MwGT28h +IhLDIk7iC9QZDqHE8ylOI3TxhI1g6v1YCFEwNREDyR3aRR4ZGQyx0Y2K9hvHDSKZPxC sTLOiXcl2vYIfc5O3X/D8y/407bXy3JX6g/P4YTsUmHjZBwaLGA9bQkqnOGjdio9vrUu uAck+OnBDOKxSg8zxcf36QNI6hej11Z5rbNLHT55E9Po+AylMsazK7v3hytWEjD4OpMB F9TQ== 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=Faz0Cjh+rye9YmsaV6fkG66+jINf+cXn9/AJecX2Y/c=; b=TV6igb6r+k7/lfjffCLlYAA0dmKkfuKReocz0N4mXwPnn5uezI+Bq2L7HgwrjOw/bH w7+lxEciG/iFZyM0StXOpsfvwxzo5yi/lhYeaeLBLy5t7uEEeQPu5N5vmDxzLrPXtXvD FbuAd/iQBGy7/X0swwJZ/sxdCEfGLl0pivAMjnpVqYbt7yRYUolttgOpvGKgcsvvkaCl RnBkg5Sb/Xmi1CBsdaNNrHTmWwiu/fOZAOxe6ZOs80ECj8vE4qRZKLeVQfdCP1ARsRqm hTKiy2UMSDFoe8ZO7j0MHSccVSGaQ4RJSMuP18YJgNS5IaStLLh76Fzhriz2vLwkbUVX LTWw== X-Gm-Message-State: AOAM531sfOfJ2URcm1zyb0VFah1uFpvmUY1U+MOSKC1C84yDTOVK0ceH 7dxjuCLVTjaHQtP8zi0EOqeWFcMLZl3avqqcEN+93mNhOzM= X-Google-Smtp-Source: ABdhPJz1kAmBGjnaYxXDtb1NDotfBDUVFUma5/Y9vFGr0NkKjY29luVA/TafpC4fhCmKs4kvVe9xDPGqn3j0nuJtZNA= X-Received: by 2002:a02:887:: with SMTP id 129mr1606383jac.130.1601305261232; Mon, 28 Sep 2020 08:01:01 -0700 (PDT) MIME-Version: 1.0 From: Shivam Mehra Date: Mon, 28 Sep 2020 20:30:50 +0530 Message-ID: Subject: remus network buffering To: xen-users@lists.xenproject.org Content-Type: multipart/alternative; boundary="00000000000045da3b05b060ef21" X-Mailman-Approved-At: Mon, 28 Sep 2020 15:45:37 +0000 X-BeenThere: xen-users@lists.xenproject.org X-Mailman-Version: 2.1.29 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" --00000000000045da3b05b060ef21 Content-Type: text/plain; charset="UTF-8" 1) from where i can get the source code of remus: fault tolerance service to xen VM and documentation to use it? 2) I want to build a network-buffering module for an application running directly on a host such that packets released by the application are buffered. Is this possible? 3) What changes do I have to make in the Remus network buffering module to do 2nd? --00000000000045da3b05b060ef21 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
1) from where i can get the source code of remus: fault=C2= =A0tolerance service to xen VM and documentation to use it?

<= div>2) I want to build a network-buffering module for an application runnin= g directly on a host such=C2=A0that packets released=C2=A0by the applicatio= n=C2=A0are buffered. Is this possible?

3) What= changes do I have to make in the Remus=C2=A0network buffering module to do= 2nd?
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