]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
mm: move pagevec stripping to save unlock-relock
authorJohannes Weiner <hannes@cmpxchg.org>
Tue, 31 Mar 2009 22:23:12 +0000 (15:23 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 1 Apr 2009 15:59:13 +0000 (08:59 -0700)
commit2443462b0a04ef0f82ad48f4fd0ef4ac5b24c4b7
tree3be4cdc338bf004f7b8c6c70baf7fb78ad252844
parent2584e517320bd48dc8d20e38a2621a2dbe58fade
mm: move pagevec stripping to save unlock-relock

In shrink_active_list() after the deactivation loop, we strip buffer heads
from the potentially remaining pages in the pagevec.

Currently, this drops the zone's lru lock for stripping, only to reacquire
it again afterwards to update statistics.

It is not necessary to strip the pages before updating the stats, so move
the whole thing out of the protected region and save the extra locking.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: MinChan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/vmscan.c