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    SubjectRe: [PATCH RFC] v2 expedited "big hammer" RCU grace periods

    On Mon, Apr 27, 2009 at 11:54:24AM -0400, Mathieu Desnoyers ( wrote:
    > It might sound a bit simplistic, but... scheduling a high-priority
    > workqueue on every CPUs would give you the guarantees you seem to need
    > here. Or is the delay of letting the scheduler schedule a high-priority
    > task a delay you are trying to avoid ?

    I believe not the abstract (empty) task should be invoked, but a real
    task which does the work. Presumably if we want to schedule a way
    networking part to copy its counters, system should wake up the
    appropriate userspace thread blocked in a grace-period waking path, so
    effectively either RCU callback processing code or some registered
    thread should be awakened.

    Just a detail though.

    Evgeniy Polyakov

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