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authorMinchan Kim <minchan.kim@gmail.com>2010-12-22 04:24:16 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2010-12-23 06:43:33 +0300
commitdd9e5efe3aa9fc5b1ce484a531ecdba3a7a30bbf (patch)
tree2ccf4d51b423706db976c5eab214d0e23195461b /mm/compaction.c
parent90a8a73c06cc32b609a880d48449d7083327e11a (diff)
downloadlinux-dd9e5efe3aa9fc5b1ce484a531ecdba3a7a30bbf.tar.xz
mm/compaction.c: avoid double mem_cgroup_del_lru()
del_page_from_lru_list() already called mem_cgroup_del_lru(). So we must not call it again. It adds unnecessary overhead. It was not a runtime bug because the TestClearPageCgroupAcctLRU() early in mem_cgroup_del_lru_list() will prevent any double-deletion, etc. Signed-off-by: Minchan Kim <minchan.kim@gmail.com> Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/compaction.c')
-rw-r--r--mm/compaction.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index 4d709ee59013..1a8894eadf72 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -279,7 +279,6 @@ static unsigned long isolate_migratepages(struct zone *zone,
/* Successfully isolated */
del_page_from_lru_list(zone, page, page_lru(page));
list_add(&page->lru, migratelist);
- mem_cgroup_del_lru(page);
cc->nr_migratepages++;
/* Avoid isolating too much */