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    SubjectRe: [RFC][PATCH] Fix cpu hotplug hang

    * Nathan Lynch <ntl@pobox.com> wrote:

    > Sebastien Dugue wrote:
    > > On Mon, 1 Dec 2008 14:09:07 +0100 Sebastien Dugue <sebastien.dugue@bull.net> wrote:
    > >
    > > >
    > > > here is a patch that fixes a CPU hotplug hang I get on a Power6
    > > > box. It may not be the only possible fix but it appears to be the
    > > > cleanest I can think of at the moment.
    > > >
    > > > Comments welcomed.
    > >
    > > Ingo, Thomas, anybody care to comment on the hang and this possible fix?
    >
    > FWIW, I was able to recreate this hang with 2.6.28 on a 8-way Power5
    > system, and Sebastien's patch does appear to fix the problem for my
    > testcase, which does a few hundred offline/online operations.

    i've applied Sebastien's patch to tip/timers/hrtimers. Good catch! I've
    also tagged it for a -stable backport.

    Ingo


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