Re: [(RT RFC) PATCH v2 8/9] adjust pi_lock usage in wakeup

[Pavel Machek]

On Mon 2008-02-25 11:01:18, Gregory Haskins wrote:
> From: Peter W.Morreale <pmorreale@xxxxxxxxxx>
> 
> 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@xxxxxxxxxx>

Missing sign-off.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/