[Bug 1322441] Re: QEMU Windows guest unstable after random amount of time
** Changed in: qemu (Ubuntu) Importance: High = Medium -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu in Ubuntu. https://bugs.launchpad.net/bugs/1322441 Title: QEMU Windows guest unstable after random amount of time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1322441/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1322441] Re: QEMU Windows guest unstable after random amount of time
@penalvch, I'd suggest that since booting with the old 3.2 kernel prevented this bug, this bug should still be marked as affecting the kernel. Lowering priority to medium since there is a workaround (technically 2) -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu in Ubuntu. https://bugs.launchpad.net/bugs/1322441 Title: QEMU Windows guest unstable after random amount of time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1322441/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1322441] Re: QEMU Windows guest unstable after random amount of time
** Package changed: qemu (Ubuntu) = linux (Ubuntu) ** Changed in: linux (Ubuntu) Status: New = Confirmed -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu in Ubuntu. https://bugs.launchpad.net/bugs/1322441 Title: QEMU Windows guest unstable after random amount of time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1322441/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1322441] Re: QEMU Windows guest unstable after random amount of time
** Description changed: Ubuntu 14.04, all updates done as of 23/5/2014 Kernel : Linux 3.13.0-24-generic Qemu : 1.7.1 and 2.0.0 tested Tested using both Xeon 5620 and 5520 processors, 48GB RAM. - Anywhere from 20 minutes for 3+ hours after booting Windows guests become unstable. Guest appear to freeze intermittently (VNC console unresponsive, network pings dropped to guest, frozen IO) for 20-60 seconds at a time which repeats constantly every few minutes and guests do not recover unless QEMU is killed and the guest is started again. Whilst the guest is frozen CPU usage of the QEMU process jumps to 100-150%. - --- + Anywhere from 20 minutes for 3+ hours after booting Windows guests + become unstable. Guest appear to freeze intermittently (VNC console + unresponsive, network pings dropped to guest, frozen IO) for 20-60 + seconds at a time which repeats constantly every few minutes and guests + do not recover unless QEMU is killed and the guest is started again. + Whilst the guest is frozen CPU usage of the QEMU process jumps to + 100-150%. + + WORKAROUND: Disable automatic NUMA balancing: + echo 0 /proc/sys/kernel/numa_balancing + + --- AlsaDevices: - total 0 - crw-rw 1 root audio 116, 1 May 24 01:25 seq - crw-rw 1 root audio 116, 33 May 24 01:25 timer + total 0 + crw-rw 1 root audio 116, 1 May 24 01:25 seq + crw-rw 1 root audio 116, 33 May 24 01:25 timer AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.14.1-0ubuntu3.1 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory DistroRelease: Ubuntu 14.04 HibernationDevice: RESUME=UUID=38dc08b6-55f7-482d-8f82-f048b3dbad56 InstallationDate: Installed on 2013-03-21 (428 days ago) InstallationMedia: Ubuntu-Server 12.04.1 LTS Precise Pangolin - Release amd64 (20120817.3) MachineType: Supermicro X8DTT Package: linux (not installed) PciMultimedia: - + ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-24-generic root=UUID=386ad1f0-7ced-414f-9a09-4c078c36977c ro nomdmonddf nomdmonisw nomdmonddf nomdmonisw ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9 RelatedPackageVersions: - linux-restricted-modules-3.13.0-24-generic N/A - linux-backports-modules-3.13.0-24-generic N/A - linux-firmware 1.127.2 + linux-restricted-modules-3.13.0-24-generic N/A + linux-backports-modules-3.13.0-24-generic N/A + linux-firmware 1.127.2 RfKill: Error: [Errno 2] No such file or directory Tags: trusty Uname: Linux 3.13.0-24-generic x86_64 UpgradeStatus: Upgraded to trusty on 2014-05-21 (2 days ago) UserGroups: - + _MarkForUpload: True dmi.bios.date: 05/20/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 080016 dmi.board.asset.tag: 1234567890 dmi.board.name: X8DTT dmi.board.vendor: Supermicro dmi.board.version: 2.0 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 17 dmi.chassis.vendor: Supermicro dmi.chassis.version: 1234567890 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080016:bd05/20/2010:svnSupermicro:pnX8DTT:pvr1234567890:rvnSupermicro:rnX8DTT:rvr2.0:cvnSupermicro:ct17:cvr1234567890: dmi.product.name: X8DTT dmi.product.version: 1234567890 dmi.sys.vendor: Supermicro -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu in Ubuntu. https://bugs.launchpad.net/bugs/1322441 Title: QEMU Windows guest unstable after random amount of time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1322441/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1322441] Re: QEMU Windows guest unstable after random amount of time
Matthew Anderson, did this problem not occur in a release prior to Trusty? ** Package changed: linux (Ubuntu) = qemu (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu in Ubuntu. https://bugs.launchpad.net/bugs/1322441 Title: QEMU Windows guest unstable after random amount of time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1322441/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1322441] Re: QEMU Windows guest unstable after random amount of time
Not this exact problem but one with similar symptoms. From kernel 3.5 onwards there was a problem with guests not receiving RTC ticks which was reported here - http://lists.gnu.org/archive/html/qemu- devel/2013-02/msg03827.html The 3.2 kernel from 12.04.1 never had any issues but the 3.5 kernel from 12.04.2 onwards hit the RTC bug whoch was fixed in later releases of QEMU. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu in Ubuntu. https://bugs.launchpad.net/bugs/1322441 Title: QEMU Windows guest unstable after random amount of time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1322441/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1322441] Re: QEMU Windows guest unstable after random amount of time
** Changed in: qemu (Ubuntu) Importance: Medium = High ** Changed in: qemu (Ubuntu) Status: Incomplete = New -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu in Ubuntu. https://bugs.launchpad.net/bugs/1322441 Title: QEMU Windows guest unstable after random amount of time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1322441/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1322441] Re: QEMU Windows guest unstable after random amount of time
Based on the fact that flush_tlb_page() appears to be taking up most of the CPU time when QEMU is 'frozen' I started playing with memory settings. Disabling automatic NUMA balancing appears to have solved the problem. echo 0 /proc/sys/kernel/numa_balancing The guest has been running 4+ hours now without an issue. I currently have KSM and transparent huge pages enabled. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to qemu in Ubuntu. https://bugs.launchpad.net/bugs/1322441 Title: QEMU Windows guest unstable after random amount of time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1322441/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
