[Bug 1268906] Re: cpu soft lockup running kvm

[Stefan Bader]

This looks to be drilling down to a problem which seems to only affect
i386 for some reason. But basically the kvm/qemu process gets into a
situation where the thread_info says "you have to reschedule" but the
per-cpu counterpart prevents that. Now the kvm/qemu process runs wildly
around between trying to run the guest vcpu which is not done because
the process side says reschedule and the cond_reschedule() function not
doing anything because the cpu info tells it otherwise.

Right now I got a test kernel back to run kvm but that is rather a vile
work-around. I have sent an email upstream in the hope that somebody
there has a better solution.

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https://bugs.launchpad.net/bugs/1268906

Title:
  cpu soft lockup running kvm

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