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cma: decrease cc.nr_migratepages after reclaiming pagelist 

reclaim_clean_pages_from_list() reclaims clean pages before migration so
cc.nr_migratepages should be updated.  Currently, there is no problem but
it can be wrong if we try to use the value in future.

Signed-off-by: Minchan Kim <minchan@kernel.org>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Minchan Kim 2012-10-08 16:33:51 -07:00 committed by Linus Torvalds
parent e46a28790e
commit beb51eaa88
1 changed files with 4 additions and 2 deletions
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6
mm/page_alloc.c
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@ -5674,7 +5674,7 @@ static int __alloc_contig_migrate_range(struct compact_control *cc,
unsigned long start, unsigned long end)
{
/* This function is based on compact_zone() from compaction.c. */
unsigned long nr_reclaimed;
unsigned long pfn = start;
unsigned int tries = 0;
int ret = 0;
@ -5701,7 +5701,9 @@ static int __alloc_contig_migrate_range(struct compact_control *cc,
break;
}
reclaim_clean_pages_from_list(cc->zone, &cc->migratepages);
nr_reclaimed = reclaim_clean_pages_from_list(cc->zone,
&cc->migratepages);
cc->nr_migratepages -= nr_reclaimed;
ret = migrate_pages(&cc->migratepages,
alloc_migrate_target,