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    SubjectRe: [PATCH] softlockup detection vs. cpu hotplug
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    On Fri, 2006-02-24 at 08:31 +0800, Nathan Lynch wrote:
    >
    > In the watchdog thread, do touch_softlockup_watchdog in a
    > non-preemptible section so that it won't touch another cpu's
    > timestamp. This can happen in the window between the watchdog thread
    > getting forcefully migrated during a cpu offline operation and
    > kthread_should_stop.
    Could we stop the thread in CPU_DOWN_PREPARE case, so it will not be
    migrated to other CPUs? I suppose it's better the per-cpu thread only
    runs on the specific cpu.

    Thanks,
    Shaohua

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