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authorMarek Szyprowski <m.szyprowski@samsung.com>2012-12-12 13:51:19 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-12-12 17:38:32 -0800
commitbe49a6e13537f32f85bd8c4ba04317ca36ca60ff (patch)
tree00f629b7be8203ce1fef100ab8875e291033dc5d /mm/page_alloc.c
parentc8bf2d8ba4fbc093de7c0d192fe5d2531f14b8b9 (diff)
downloadlinux-be49a6e13537f32f85bd8c4ba04317ca36ca60ff.tar.gz
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>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5a8d339d282..4171cd4f825 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)) {