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SubjectRe: [(RT RFC) PATCH v2 8/9] adjust pi_lock usage in wakeup
On Mon 2008-02-25 11:01:18, Gregory Haskins wrote:
> From: Peter W.Morreale <pmorreale@novell.com>
>
> In wakeup_next_waiter(), we take the pi_lock, and then find out whether
> we have another waiter to add to the pending owner. We can reduce
> contention on the pi_lock for the pending owner if we first obtain the
> pointer to the next waiter outside of the pi_lock.
>
> This patch adds a measureable increase in throughput.
>
> Signed-off-by: Peter W. Morreale <pmorreale@novell.com>

Missing sign-off.

Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


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