Public bug reported:
I am running a virtual machine using KVM (managed via libvirt, installed
with vmbuilder).
For one particular virtual machine only on the host (so far), it randomly stops
responding occasionally and needs a reboot. On the screen (when I VNC to it) I
get messages like "BUG: soft lockup - CPU#1 stuck for 61s! [fcheck:7246]"
but it doesn't have to be fcheck, it can be any process.
The other virtual machine on the host doesn't crash at the same time -
it hasn't actually crashed yet at all since it was installed, although
it uses the same kernel, was installed with the same commands and has
the same versions of everything. The virtual machine that crashes is
fine for days, even weeks, but then crashes.
I am graphing both the virtual machine and the host via Munin and
nothing unusual is happening around the times of these crashes, the load
on both is very low. I have attached the logs (/var/log/syslog) for two
example crashes.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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Virtual machine soft lockup - CPU gets stuck for XX seconds
https://bugs.launchpad.net/bugs/333201
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