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SubjectRe: Warning in during hotplug on 2.6.27-rc2-git5
Date
On Monday, 18 of August 2008, Langsdorf, Mark wrote:
> > > > The only way I could see that happening if CPU_DEAD/CPU_ONLINE
> > > > is not properly balanced.
> > >
> > > I'm still seeing it on 2.6.27-rc2, even with the
> > > patch here http://lkml.org/lkml/2008/7/30/171 and the
> > > wbinvd_halt code patch applied. Maybe something else
> > > broke in some of the recent hotplug changes?
> >
> > Mark, have you tried to test with commit
> > 34ae7f35a21694aa5cb8829dc5142c39d73d6ba0
> > (your "preregister support for powernow-k8" patch) reverted
> > and MCE enabled?
>
> Yes, it's a failure on a clean 2.6.27-rc2 installation.

Ah, the commit was done after -rc2, sorry.

I have a couple of questions, then:
- Does it fail identically for all CPUs or for CPU4 and above only?
- Did previous kernels, most importantly 2.6.26, work correctly?

Also, can you please attach dmesg output, including the offlining of a CPU
that would later lead to the problem with cpu_up(), to the Bugzilla entry at
http://bugzilla.kernel.org/show_bug.cgi?id=11337 ?

Thanks,
Rafael


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