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    SubjectRe: [OOPS] hotplugging cpus via /sys/devices/system/cpu/
    On Fri, Sep 09, 2005 at 01:41:58PM -0700, Christopher Beppler wrote:
    >
    > [1.] One line summary of the problem:
    > If I deactivate a CPU with /sys/devices/system/cpux and try to
    > reactivate it, then the CPU doesn't start and the kernel prints out an
    > oops.
    >

    Could you try this on 2.6.13-mm2? If this is due to a sending broadcast
    IPI related issue that should fix the problem.

    I should say i didnt try i386 in a while
    but i suspect some of the recent suspend/resume code required some
    modifications to the i386 hotplug code which might be getting in the way
    if you just try logical cpu hotplug alone without using it for suspend/resume.

    Shaohua might know more about the status.

    Cheers,
    ashok
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