From: Hugh Dickins <hugh@veritas.com>

add_to_page_cache_lru puts PageSwapBacked pages on the active_anon lru, so
shouldn't mem_cgroup_charge_common mirror that by setting FLAG_ACTIVE?

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memcontrol.c |    2 ++
 1 file changed, 2 insertions(+)

diff -puN mm/memcontrol.c~vmscan-split-lru-lists-into-anon-file-sets-splitlru-memcg-swapbacked-pages-active mm/memcontrol.c
--- a/mm/memcontrol.c~vmscan-split-lru-lists-into-anon-file-sets-splitlru-memcg-swapbacked-pages-active
+++ a/mm/memcontrol.c
@@ -560,6 +560,8 @@ static int mem_cgroup_charge_common(stru
 		pc->flags = PAGE_CGROUP_FLAG_CACHE;
 		if (page_is_file_cache(page))
 			pc->flags |= PAGE_CGROUP_FLAG_FILE;
+		else
+			pc->flags |= PAGE_CGROUP_FLAG_ACTIVE;
 	} else
 		pc->flags = PAGE_CGROUP_FLAG_ACTIVE;
 
_