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[Xen-devel] Re: Problem running latest Xen unstable hypervisor with late

To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Subject: [Xen-devel] Re: Problem running latest Xen unstable hypervisor with latest Linux kernels
From: Dave McCracken <dcm@xxxxxxxx>
Date: Fri, 21 May 2010 18:22:51 -0500
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Xen Developers List <xen-devel@xxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>
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On Friday, May 21, 2010, Keir Fraser wrote:
> > I have a test box set up to run mainline Xen unstable hypervisor and a
> > guest running the latest Linux builds from Jeremy.  Last week it all
> > worked fine. This week when I pulled the latest unstable it stopped
> > working.
> 
> This is a hypervisor bug. I would have bet that my recent smpboot/hotplug
> changes might have caused it, but happily I can report that I am not to
> blame. The offending changeset is 21339:804304d4e05d "x86: TSC handling
> cleanups" by Stefano (cc'ed). The automated regression tests have also been
> failing ever since it went in, so clearly PV guest startup failure is not
> hard to repro with this patch applied. For now I have reverted it
> (xen-unstable:21444), so please re-pull, re-build, re-test.

The guest now boots just fine.  Thanks.

Dave

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