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    SubjectRe: [PATCH] fix rcu vs hotplug race
    On Tue, Jul 01, 2008 at 08:16:01AM +0200, Ingo Molnar wrote:
    >
    > * Gautham R Shenoy <ego@in.ibm.com> wrote:
    >
    > > So, it's the design of stop_machine() that's preventing someone from
    > > updating the cpu_online_map while force_quiescent_state() is
    > > performing the cpu_is_online() check. Becase we always call
    > > force_quiescent_state() with irqs disabled :)
    >
    > Paul, do you concur? I'll apply the commit in the form below to
    > tip/core/urgent if Paul agrees.
    >
    > Ingo

    Ingo,

    I believe Gautham's fix at http://lkml.org/lkml/2008/6/27/9 is better
    and also explains it better.

    Thanks.
    --
    regards,
    Dhaval


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