From: Mel Gorman <mgorman@suse.de>
Date: Wed, 4 Jun 2014 23:07:15 +0000 (-0700)
Subject: mm: page_alloc: do not cache reclaim distances
X-Git-Tag: omap-for-v3.16/fixes-against-rc1~56^2~16^2~201
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5f7a75acdb24c7b9c436b3a0a66eec12e101d19c;p=pandora-kernel.git

mm: page_alloc: do not cache reclaim distances

pgdat->reclaim_nodes tracks if a remote node is allowed to be reclaimed
by zone_reclaim due to its distance.  As it is expected that
zone_reclaim_mode will be rarely enabled it is unreasonable for all
machines to take a penalty.  Fortunately, the zone_reclaim_mode() path
is already slow and it is the path that takes the hit.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Reviewed-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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