mm: test PageSwapBacked in lumpy reclaim

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>

1 files changed, 1 insertions, 1 deletions

diff --git a/mm/vmscan.c b/mm/vmscan.c
index b935e6f0d695..8a4e767fb8ac 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -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
                          * pointless.
                          */
-                        if (nr_swap_pages <= 0 && PageAnon(cursor_page) &&
+                        if (nr_swap_pages <= 0 && PageSwapBacked(cursor_page) &&
                             !PageSwapCache(cursor_page))
                                 break;