[RFC][-mm] [3/7] add shmem page to active list.

[KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>]

Original one is Hugh Dickins's
  http://marc.info/?l=linux-kernel&m=121469899304590&w=2
Not necessary if his one is merged.

add shmem's page to active list when we link it to memcg's lru.
need discussion ?

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
 mm/memcontrol.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Index: test-2.6.26-rc5-mm3++/mm/memcontrol.c
===================================================================
--- test-2.6.26-rc5-mm3++.orig/mm/memcontrol.c
+++ test-2.6.26-rc5-mm3++/mm/memcontrol.c
@@ -575,7 +575,10 @@ static int mem_cgroup_charge_common(stru
 	if (ctype == MEM_CGROUP_CHARGE_TYPE_CACHE)
 		pc->flags = PAGE_CGROUP_FLAG_FILE;
 	else
-		pc->flags = PAGE_CGROUP_FLAG_ACTIVE;
+		pc->flags = 0;
+	/* anonymous page and shmem pages are started from active list */
+	if (!page_is_file_cache(page))
+		pc->flags |= PAGE_CGROUP_FLAG_ACTIVE;
 
 	lock_page_cgroup(page);
 	if (unlikely(page_get_page_cgroup(page))) {

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