Date: Thu, 31 May 2012 10:48:45 -0400 From: John Baldwin <jhb@freebsd.org> To: Mark Felder <feld@feld.me> Cc: freebsd-hackers@freebsd.org, freebsd-questions@freebsd.org Subject: Re: Please help me diagnose this crazy VMWare/FreeBSD 8.x crash Message-ID: <201205311048.45813.jhb@freebsd.org> In-Reply-To: <op.we40bn0z34t2sn@tech304> References: <op.wbwe9s0k34t2sn@tech304> <201205301317.07345.jhb@freebsd.org> <op.we40bn0z34t2sn@tech304>
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On Wednesday, May 30, 2012 3:56:02 pm Mark Felder wrote: > On Wed, 30 May 2012 12:17:07 -0500, John Baldwin <jhb@freebsd.org> wrote: > > > > > Humm, can you test it with 2 CPUs? > > > > We primarily only run with 1 CPU. We have seen it crash on multiple CPU > VMs. Also, Dane Foster appeared to have been using multiple CPUs in his > video transcoding VMs. > > Unfortunately I can't give you more information at the moment. I'm working > with Dane to compile easy to follow steps that recreate this failure. I > have not been successful in getting this to crash on demand in my > environment, but Dane has so we're trying to recreate his. Ok. It would be really helpful if we could get a crashdump, though I realize that may not be doable. Otherwise, full DDB ps output from a hang would be a good start. Primarily I would want to see what the system is doing and why it isn't running the threads on the run queue. It might also be useful to add KTR_SCHED tracing so we can get the output of that via 'show ktr' from DDB when it hangs. -- John Baldwin
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