From: Dave Chinner <dchinner@redhat.com>
Date: Fri, 8 Jul 2011 04:14:37 +0000 (+1000)
Subject: vmscan: add customisable shrinker batch size
X-Git-Tag: v3.1-rc1~282^2~47
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e9299f5058595a655c3b207cda9635e28b9197e6;p=pandora-kernel.git

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>
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