[Bug 714335] Re: KVM SMP Linux Guests Hang

[Brian Knoll]

What is the fastest and easiest way for me to add these Natty backports
packages to test them on my affected machines?  I went to the PPA you
mentioned but I see a very large list of packages.  I would prefer to
add some repo to my apt sources list and get them that way, but I'm not
100% certain exactly what to add at this point.


--- On Mon, 2/14/11, Serge Hallyn <714335 at bugs.launchpad.net> wrote:

From: Serge Hallyn <714335 at bugs.launchpad.net>
Subject: [Bug 714335] Re: KVM SMP Linux Guests Hang
To: brianknoll2000 at yahoo.com
Date: Monday, February 14, 2011, 4:24 PM

Is it possible in your environment to test with the kernel package from
https://launchpad.net/~kernel-ppa/+archive/ppa?

The package is called linux-lts-backport-natty, and should include all
kvm fixes which are currently upstream.  If that does not fix it, then
the two commits cited above in comment #16 can't fix it.

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https://bugs.launchpad.net/bugs/714335

Title:
  KVM SMP Linux Guests Hang

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

Bug description:
  Binary package hint: qemu-kvm

  SMP Linux guests are hanging under KVM.  This does not happen always,
  but at least 50% of the time or so.

  If I start the guests with "-smp 1" or just completely omit the "-smp"
  parameter this doesn't happen.

  I can also say that it doesn't seem to happen on a Nehalem-based
  8-core Xeon-based machine I've tried it on, but it does happen on both
  an AMD Phenom II 965 machine (the one this bug report is from) as well
  as an AMD Phenom II 1090T-based machine.

  I am starting the VMs from the command line, manually running qemu-kvm
  with a command like the following:

  qemu-system-x86_64 -m 1024 -smp 4 -cpu host -drive
  file=/var/local/kvm/machine.qcow2,if=virtio,cache=off,boot=on -net
  nic,model=virtio,macaddr=77:88:99:12:34:56 -net tap -nographic
  -daemonize

  Additional Information:

  Description:    Ubuntu 10.04.2 LTS
  Release:    10.04

  qemu-kvm:
    Installed: 0.12.3+noroms-0ubuntu9.3
    Candidate: 0.12.3+noroms-0ubuntu9.3
    Version table:
   *** 0.12.3+noroms-0ubuntu9.3 0
          500 http://us.archive.ubuntu.com/ubuntu/ lucid-updates/main Packages
          100 /var/lib/dpkg/status
       0.12.3+noroms-0ubuntu9 0
          500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: qemu-kvm 0.12.3+noroms-0ubuntu9.3
  ProcVersionSignature: Ubuntu 2.6.32-28.55-server 2.6.32.27+drm33.12
  Uname: Linux 2.6.32-28-server x86_64
  Architecture: amd64
  Date: Sun Feb  6 19:11:57 2011
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
  KvmCmdLine: Error: command ['ps', '-C', 'kvm', '-F'] failed with exit code 1: UID        PID  PPID  C    SZ   RSS PSR STIME TTY          TIME CMD
  MachineType: System manufacturer System Product Name
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-28-server root=UUID=941072c0-f822-44b4-b61c-09b6daadcb7c ro quiet splash clocksource=pit
  ProcEnviron:
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: qemu-kvm
  dmi.bios.date: 08/18/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1006
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: M4A785-M
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1006:bd08/18/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A785-M:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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Title:
  KVM SMP Linux Guests Hang