Re: [Qemu-devel] [Bug 1307473] Re: guest hang due to missing clock interrupt

[Serge Hallyn <1307473@bugs.launchpad.net>]

Quoting Ondergetekende (1307473@bugs.launchpad.net):
> We've resolved our issues by disabling KSM on the affected nodes. All of
> the non-affected nodes didn't have KSM enabled (due to a packaging bug
> elsewhere). After disabling KSM, our problems went away gradually in ~3
> days.
> 
> This means we're no longer affected by this issue (and given the other
> reports, probably never were).

And which specific kernel are you on?

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https://bugs.launchpad.net/bugs/1307473

Title:
  guest hang due to missing clock interrupt

Status in QEMU:
  New
Status in “linux” package in Ubuntu:
  Confirmed
Status in “qemu” package in Ubuntu:
  Confirmed

Bug description:
  
  I noticed on 2 different systems that after upgrade from precise to latest trusty VMs are crashing:

  - in case of Windows VMs I'm getting BSOD with error message: "A clock interrupt was not received on a secondary processor within the allocated time interval."
  - On linux VMs I'm noticing "hrtimer: interrupt took 2992229 ns" messages 
  - On some proprietary virtual appliances I'm noticing crashes an due to missing timer interrupts

  QEMU version is:
  QEMU emulator version 1.7.91 (Debian 2.0.0~rc1+dfsg-0ubuntu3)

  Full command line:

  qemu-system-x86_64 -enable-kvm -name win7eval -S -machine pc-
  i440fx-1.7,accel=kvm,usb=off -cpu host -m 4096 -realtime mlock=off
  -smp 4,sockets=1,cores=4,threads=1 -uuid 05e5089a-
  4aa1-6bb2-ef06-a6666b4d020a -no-user-config -nodefaults -chardev
  socket,id=charmonitor,path=/var/lib/libvirt/qemu/win7eval.monitor,server,nowait
  -mon chardev=charmonitor,id=monitor,mode=control -rtc base=localtime
  -no-shutdown -boot strict=on -device piix3-usb-
  uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive
  file=/var/vm/win7eval.qcow2,if=none,id=drive-virtio-disk0,format=qcow2
  -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-
  disk0,id=virtio-disk0,bootindex=1 -drive
  file=/home/damarion/iso/7600.16385.090713-1255_x86fre_enterprise_en-
  us_EVAL_Eval_Enterprise-GRMCENEVAL_EN_DVD.iso,if=none,id=drive-
  ide0-0-0,readonly=on,format=raw -device ide-cd,bus=ide.0,unit=0,drive
  =drive-ide0-0-0,id=ide0-0-0 -drive file=/home/damarion/iso/virtio-
  win-0.1-74.iso,if=none,id=drive-ide0-1-0,readonly=on,format=raw
  -device ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0
  -netdev tap,fd=24,id=hostnet0 -device
  e1000,netdev=hostnet0,id=net0,mac=52:54:00:38:31:0a,bus=pci.0,addr=0x3
  -chardev pty,id=charserial0 -device isa-
  serial,chardev=charserial0,id=serial0 -device usb-tablet,id=input0
  -vnc 127.0.0.1:1 -device VGA,id=video0,bus=pci.0,addr=0x2 -device
  virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5

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