From be49a6e13537f32f85bd8c4ba04317ca36ca60ff Mon Sep 17 00:00:00 2001
From: Marek Szyprowski <m.szyprowski@samsung.com>
Date: Wed, 12 Dec 2012 13:51:19 -0800
Subject: mm: use migrate_prep() instead of migrate_prep_local()
__alloc_contig_migrate_range() should use all possible ways to get all the
pages migrated from the given memory range, so pruning per-cpu lru lists
for all CPUs is required, regadless the cost of such operation. Otherwise
some pages which got stuck at per-cpu lru list might get missed by
migration procedure causing the contiguous allocation to fail.
Reported-by: SeongHwan Yoon <sunghwan.yun@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
mm/page_alloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
(limited to 'mm')
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5a8d339d282a..4171cd4f8257 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5727,7 +5727,7 @@ static int __alloc_contig_migrate_range(struct compact_control *cc,
unsigned int tries = 0;
int ret = 0;
- migrate_prep_local();
+ migrate_prep();
while (pfn < end || !list_empty(&cc->migratepages)) {
if (fatal_signal_pending(current)) {
--
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