memcg: show reclaim stat

Add the following four fields to memory.stat file:

  - inactive_ratio
  - recent_rotated_anon
  - recent_rotated_file
  - recent_scanned_anon
  - recent_scanned_file

Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index b8c1e5acc25..af28e128b74 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1816,6 +1816,36 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
                 cb->fill(cb, "unevictable", unevictable * PAGE_SIZE);
 
         }
+
+#ifdef CONFIG_DEBUG_VM
+        cb->fill(cb, "inactive_ratio", mem_cont->inactive_ratio);
+
+        {
+                int nid, zid;
+                struct mem_cgroup_per_zone *mz;
+                unsigned long recent_rotated[2] = {0, 0};
+                unsigned long recent_scanned[2] = {0, 0};
+
+                for_each_online_node(nid)
+                        for (zid = 0; zid < MAX_NR_ZONES; zid++) {
+                                mz = mem_cgroup_zoneinfo(mem_cont, nid, zid);
+
+                                recent_rotated[0] +=
+                                        mz->reclaim_stat.recent_rotated[0];
+                                recent_rotated[1] +=
+                                        mz->reclaim_stat.recent_rotated[1];
+                                recent_scanned[0] +=
+                                        mz->reclaim_stat.recent_scanned[0];
+                                recent_scanned[1] +=
+                                        mz->reclaim_stat.recent_scanned[1];
+                        }
+                cb->fill(cb, "recent_rotated_anon", recent_rotated[0]);
+                cb->fill(cb, "recent_rotated_file", recent_rotated[1]);
+                cb->fill(cb, "recent_scanned_anon", recent_scanned[0]);
+                cb->fill(cb, "recent_scanned_file", recent_scanned[1]);
+        }
+#endif
+
         return 0;
 }