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mm: test PageSwapBacked in lumpy reclaim

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Lumpy reclaim does well to stop at a PageAnon when there's no swap, but
better is to stop at any PageSwapBacked, which includes shmem/tmpfs too.

Signed-off-by: Hugh Dickins <hughd@google.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hugh Dickins 2012-01-10 15:08:33 -08:00 • committed by Linus Torvalds
parent faed836a23
commit 043bcbe5ec
1 changed files with 1 additions and 1 deletions
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2
mm/vmscan.c
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@ -1166,7 +1166,7 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan,
* anon page which don't already have a swap slot is * anon page which don't already have a swap slot is
* pointless. * pointless.
*/ */
if (nr_swap_pages <= 0 && PageAnon(cursor_page) && if (nr_swap_pages <= 0 && PageSwapBacked(cursor_page) &&
!PageSwapCache(cursor_page)) !PageSwapCache(cursor_page))
break; break;