From: Michal Hocko <mhocko@suse.cz>
Date: Tue, 10 Jan 2012 23:08:02 +0000 (-0800)
Subject: mm: fix off-by-two in __zone_watermark_ok()
X-Git-Tag: sz_154~128
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=567f29ffd86f9836da7b6ab96bd1bb8e2e88fbd9;p=pandora-kernel.git

mm: fix off-by-two in __zone_watermark_ok()

Commit 88f5acf88ae6 ("mm: page allocator: adjust the per-cpu counter
threshold when memory is low") changed the form how free_pages is
calculated but it forgot that we used to do free_pages - ((1 << order) -
1) so we ended up with off-by-two when calculating free_pages.

Reported-by: Wang Sheng-Hui <shhuiw@gmail.com>
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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