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| author | KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> | 2013-11-13 00:08:18 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-13 04:09:09 +0100 |
| commit | 5d0f3f72efb1c1968ce1f56c58f9e3e6495effa6 (patch) | |
| tree | 305b30145ede375a9fd146304540f2c3c9af9748 | |
| parent | readahead: fix sequential read cache miss detection (diff) | |
| download | linux-5d0f3f72efb1c1968ce1f56c58f9e3e6495effa6.tar.xz linux-5d0f3f72efb1c1968ce1f56c58f9e3e6495effa6.zip | |
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.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 770dbb43465f..5a9883614d99 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, |