tree b31a4dc5cab98ee1701313f45e92e583c2d76f63
parent 3567b59aa80ac4417002bf58e35dce5c777d4164
author Dave Chinner <dchinner@redhat.com> 1310098477 +1000
committer Al Viro <viro@zeniv.linux.org.uk> 1311140672 -0400

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>