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    SubjectRe: [RFC patch 2/5] smpboot: Provide infrastructure for percpu hotplug threads
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    On Thu, 2012-06-14 at 10:08 +0200, Peter Zijlstra wrote:
    > On Wed, 2012-06-13 at 20:56 +0200, Thomas Gleixner wrote:
    > > If it's just a spurious wakeup then it goes back to sleep right away
    > > as nothing cleared the park bit.
    >
    > Your spurious wakeup will have destroyed the binding though. So you need
    > to be careful.

    We should probably do something like the below..

    TJ does this wreck workqueues? Its somewhat 'creative' in that regard
    and really wants fixing.

    ---
    --- a/kernel/sched/core.c
    +++ b/kernel/sched/core.c
    @@ -5018,6 +5018,8 @@ void do_set_cpus_allowed(struct task_str

    cpumask_copy(&p->cpus_allowed, new_mask);
    p->nr_cpus_allowed = cpumask_weight(new_mask);
    + if (p->nr_cpus_allowed != 1)
    + p->flags &= ~PF_THREAD_BOUND;
    }

    /*


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