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    SubjectRe: [PATCH] Relay CPU Hotplug support
    On Fri, 22 Dec 2006 16:07:24 +0530
    Gautham R Shenoy <ego@in.ibm.com> wrote:

    > While we are at this per-subsystem cpuhotplug "locking", here's a
    > proposal that might put an end to the workqueue deadlock woes.

    Oleg is working on some patches which will permit us to cancel or wait upon
    a particular work_struct, rather than upon all pending work_structs.

    This will fix the problem where we accidentlly wait upon some unrelated
    work_struct which takes a lock which is related to one which we already
    hold.

    I hope. It'll be a bit tricky to implement: if some foreign work_struct is
    running right now, we cannot wait upon it - we must non-blockingly dequeue
    the work_struct which we want to kill before it gets to run.


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