kernel-packages team mailing list archive

[Launchpad Bug Tracker <1322441@xxxxxxxxxxxxxxxxxx>]

You have been subscribed to a public bug:

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%.

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
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
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

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: New


** Tags: apport-collected latest-bios-2.1c trusty
-- 
QEMU Windows guest unstable after random amount of time
https://bugs.launchpad.net/bugs/1322441
You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu.