Messages in this thread | | | Date | Thu, 16 Feb 2012 17:39:38 -0800 | Subject | Re: soft lockup detector & virtualisation | From | john stultz <> |
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On Thu, Feb 16, 2012 at 3:15 PM, Dave Jones <davej@redhat.com> wrote: > Lately I've noticed quite a few soft lockup bugs being reported. > In many of them, they're coming from inside virtual guests. > > Is the softlockup detector fundamentally broken in this situation ? > > If the host doesn't schedule the guest for whatever reason, > or the user suspends the VM and resumes it later ? > > Here's the most recent example: > https://bugzilla.redhat.com/attachment.cgi?id=563767 > > In many of these, the code where it's "stuck" isn't anything > special, which is why I think the guest just hasn't had a > timeslice in 185 seconds. > > Is there some way we can perhaps detect we're running virtualised, > and disable the detector automatically ?
I think Eric's work (See "Add check for suspended vm in softlockup detector" sent out today) tries to address this issue.
thanks -john
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