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    SubjectRe: [PATCHSET] workqueue: implement and use WQ_UNBOUND
    On 07/02/2010 11:17 AM, Tejun Heo wrote:
    > Hello, David, Arjan.
    >
    > These four patches implement unbound workqueues which can be used as
    > simple execution context provider. I changed async to use it and will
    > also make fscache use it. This can be used by setting WQ_UNBOUND on
    > workqueue creation. Works queued to unbound workqueues are implicitly
    > HIGHPRI and dispatched to unbound workers as soon as resources are
    > available and the only limitation applied by workqueue code is
    > @max_active. IOW, for both async and fscache, things will stay about
    > the same.
    >
    > WQ_UNBOUND can serve the role of WQ_SINGLE_CPU. WQ_SINGLE_CPU is
    > dropped and replaced by WQ_UNBOUND.
    >
    > Arjan, I still think we'll be better off using bound workqueues for
    > async but let's first convert without causing behavior difference.
    > Either way isn't gonna result in any noticeable difference anyway. If
    > you're okay with the conversion, please ack it.
    >
    > David, this should work for fscache/slow-work the same way too. That
    > should relieve your concern, right? Oh, and Frederic suggested that
    > we would be better off with something based on tracing API and I
    > agree, so the debugfs thing is currently dropped from the tree. What
    > do you think?

    Oops, forgot something. These four patches are on top of
    wq#for-next-candidate branch which is cmwq take#6 + four fix patches

    git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git for-next-candidate

    and available in the following git tree.

    git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git review-cmwq

    Thanks.

    --
    tejun


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