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[Bug 973536] Re: kvm brings Oneiric host to a grinding halt


Juerg Haefliger, this bug was reported a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:

where VERSION-NUMBER is the version number of the kernel you tested. For example:

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:

If the mainline kernel does not fix this bug, please add the following tags:

As well, please remove the tag:

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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  kvm brings Oneiric host to a grinding halt

Status in “linux” package in Ubuntu:
Status in “qemu-kvm” package in Ubuntu:

Bug description:
  I'm running a Windows7 guest in KVM via libvirt/virt-manager on a
  Oneiric desktop 64-bit. Every once in a while (2-3 times a week,
  sometimes daily) the CPU usage goes berserk and the host becomes very
  unresponsive and unusable. This also happened once with a Breezy guest
  so it's not strictly a Windows issue. I'm just seeing it more often
  with Windows because that's what I run daily.

  More information attached, let me know what other info I should collect, the next time the machine is in that state.
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  DistroRelease: Ubuntu 11.10
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
   UID        PID  PPID  C    SZ   RSS PSR STIME TTY          TIME CMD
   116       2892     1 13 327807 1062024 0 07:34 ?       00:49:31 /usr/bin/kvm -S -M pc-0.14 -enable-kvm -m 1024 -smp 1,sockets=1,cores=1,threads=1 -name Windows7 -uuid 63a736b8-2d14-4354-8974-83c3f0d71ea1 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/Windows7.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=readline -rtc base=localtime -boot c -drive file=/home/juergh/VirtualMachines/Windows7.img,if=none,id=drive-virtio-disk0,boot=on,format=raw,cache=none,aio=native -device virtio-blk-pci,bus=pci.0,addr=0x6,drive=drive-virtio-disk0,id=virtio-disk0 -netdev tap,fd=19,id=hostnet0 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:56:6f:49,bus=pci.0,addr=0x3 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -usb -vnc -vga std -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
  MachineType: Hewlett-Packard HP EliteBook 8530w
  NonfreeKernelModules: nvidia
  Package: qemu-kvm 0.14.1+noroms-0ubuntu6.2
  PackageArchitecture: amd64
   Socket 0:
     product info: "RICOH", "Bay8Controller", "", ""
     manfid: 0x0000, 0x0000
     function: 254 (unknown)
   Socket 0:
     3.3V 16-bit PC Card
     Subdevice 0 (function 0) bound to driver "pata_pcmcia"
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-17-generic root=UUID=076a3371-4882-4e13-a456-9855c6fb4caf ro
  ProcVersionSignature: Ubuntu 3.0.0-17.30-generic 3.0.22
  Tags:  oneiric running-unity
  Uname: Linux 3.0.0-17-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm admin cdrom dialout libvirtd lpadmin mock plugdev sambashare
  dmi.bios.date: 12/08/2009
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 68PDV Ver. F.11
  dmi.board.name: 30E7
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 90.26
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr68PDVVer.F.11:bd12/08/2009:svnHewlett-Packard:pnHPEliteBook8530w:pvrF.11:rvnHewlett-Packard:rn30E7:rvrKBCVersion90.26:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP EliteBook 8530w
  dmi.product.version: F.11
  dmi.sys.vendor: Hewlett-Packard

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