vmscan: add customisable shrinker batch size
authorDave Chinner <dchinner@redhat.com>
Fri, 8 Jul 2011 04:14:37 +0000 (14:14 +1000)
committerAl Viro <viro@zeniv.linux.org.uk>
Wed, 20 Jul 2011 05:44:32 +0000 (01:44 -0400)
commite9299f5058595a655c3b207cda9635e28b9197e6
treeb31a4dc5cab98ee1701313f45e92e583c2d76f63
parent3567b59aa80ac4417002bf58e35dce5c777d4164
vmscan: add customisable shrinker batch size

For shrinkers that have their own cond_resched* calls, having
shrink_slab break the work down into small batches is not
paticularly efficient. Add a custom batchsize field to the struct
shrinker so that shrinkers can use a larger batch size if they
desire.

A value of zero (uninitialised) means "use the default", so
behaviour is unchanged by this patch.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
include/linux/mm.h
mm/vmscan.c