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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2013-11-12 15:08:18 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-13 12:09:09 +0900
commit5d0f3f72efb1c1968ce1f56c58f9e3e6495effa6 (patch)
tree305b30145ede375a9fd146304540f2c3c9af9748
parentaf248a0c67457e5c6d2bcf288f07b4b2ed064f1f (diff)
downloadop-kernel-dev-5d0f3f72efb1c1968ce1f56c58f9e3e6495effa6.zip
op-kernel-dev-5d0f3f72efb1c1968ce1f56c58f9e3e6495effa6.tar.gz
mm: fix page_group_by_mobility_disabled breakage
Currently, set_pageblock_migratetype() screws up MIGRATE_CMA and MIGRATE_ISOLATE if page_group_by_mobility_disabled is true. It rewrites the argument to MIGRATE_UNMOVABLE and we lost these attribute. The problem was introduced by commit 49255c619fbd ("page allocator: move check for disabled anti-fragmentation out of fastpath"). So a 4 year old issue may mean that nobody uses page_group_by_mobility_disabled. But anyway, this patch fixes the problem. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Mel Gorman <mgorman@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/page_alloc.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 770dbb4..5a98836 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -234,8 +234,8 @@ int page_group_by_mobility_disabled __read_mostly;
void set_pageblock_migratetype(struct page *page, int migratetype)
{
-
- if (unlikely(page_group_by_mobility_disabled))
+ if (unlikely(page_group_by_mobility_disabled &&
+ migratetype < MIGRATE_PCPTYPES))
migratetype = MIGRATE_UNMOVABLE;
set_pageblock_flags_group(page, (unsigned long)migratetype,
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