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

To: Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>
Subject: [Xen-devel] Re: Problem running latest Xen unstable hypervisor with latest Linux kernels
From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Date: Fri, 21 May 2010 17:32:49 +0100
Cc: Xen Developers List <xen-devel@xxxxxxxxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Dave McCracken <dcm@xxxxxxxx>, Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>
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On Fri, 21 May 2010, Stefano Stabellini wrote:
> On Fri, 21 May 2010, Keir Fraser wrote:
> > On 21/05/2010 14:55, "Dave McCracken" <dcm@xxxxxxxx> 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.
> > 
> Found the bug, I am attaching the full patch to the email, the following
> is the diff to the previous version:

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