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    SubjectRe: Delayed interrupt work, thread pools
    On Wed, Jul 02, 2008 at 12:38:52PM +1000, Benjamin Herrenschmidt wrote:
    > On Tue, 2008-07-01 at 20:39 -0500, Dean Nelson wrote:
    > > As Robin, mentioned XPC manages a pool of kthreads that can (for performance
    > > reasons) be quickly awakened by an interrupt handler and that are able to
    > > block for indefinite periods of time.
    > >
    > > In drivers/misc/sgi-xp/xpc_main.c you'll find a rather simplistic attempt
    > > at maintaining this pool of kthreads.
    > > I'd love it if a general mechanism were provided so that XPC could get out
    > > of maintaining its own pool.
    > Thanks. That makes one existing in-tree user and a one likely WIP user,
    > probably enough to move forward :-)

    FWIW, the NFS server has a fairly sophisicated thread pool
    implementation that allows interesting control of pool
    affinity. Look up struct svc_pool in your local tree ;)


    Dave Chinner

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