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(parent: abc68ef) | patch
mm: fix off-by-two in __zone_watermark_ok()
authorMichal Hocko <mhocko@suse.cz>
Thu, 8 Dec 2011 04:41:50 +0000 (15:41 +1100)
committerStephen Rothwell <sfr@canb.auug.org.au>
Fri, 9 Dec 2011 04:52:38 +0000 (15:52 +1100)
commitd5219b0c21a77cdcfc381fdd9fbd4d8118f4bdcb
tree4a208372d0a40e5dfa9578a82aa798a81c893e6atree | snapshot
parentabc68ef04aba8917e824d03ac737199300a7bdf4commit | diff
mm: fix off-by-two in __zone_watermark_ok()

88f5acf8 ("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>
mm/page_alloc.c diff | blob | history
Linux kernel for KaRo TX COM modules