From: Mel Gorman <mgorman@suse.de>
Date: Wed, 11 Sep 2013 21:22:19 +0000 (-0700)
Subject: mm: compaction: do not compact pgdat for order-0
X-Git-Tag: v3.12-rc1~52^2~197
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3a7200af3d9227767869f451ed747aff07d8df48;p=pandora-kernel.git

mm: compaction: do not compact pgdat for order-0

If kswapd was reclaiming for a high order and resets it to 0 due to
fragmentation it will still call compact_pgdat.  For the most part, this
will fail a compaction_suitable() test and not compact but it is
unnecessarily sloppy.  It could be fixed in the caller but fix it in the
API instead.

[dhillf@gmail.com: pointed out that it was a potential problem]
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Hillf Danton <dhillf@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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