Unevictable LRU Page Statistics

Report unevictable pages per zone and system wide.

Kosaki Motohiro added support for memory controller unevictable
statistics.

[riel@redhat.com: fix printk in show_free_areas()]
[akpm@linux-foundation.org: fix units in /proc/vmstats]
Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Debugged-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 82c065e7551e..e93a4db93fbe 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1006,6 +1006,7 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
         {
                 unsigned long active_anon, inactive_anon;
                 unsigned long active_file, inactive_file;
+                unsigned long unevictable;
 
                 inactive_anon = mem_cgroup_get_all_zonestat(mem_cont,
                                                 LRU_INACTIVE_ANON);
@@ -1015,10 +1016,15 @@ static int mem_control_stat_show(struct cgroup *cont, struct cftype *cft,
                                                 LRU_INACTIVE_FILE);
                 active_file = mem_cgroup_get_all_zonestat(mem_cont,
                                                 LRU_ACTIVE_FILE);
+                unevictable = mem_cgroup_get_all_zonestat(mem_cont,
+                                                        LRU_UNEVICTABLE);
+
                 cb->fill(cb, "active_anon", (active_anon) * PAGE_SIZE);
                 cb->fill(cb, "inactive_anon", (inactive_anon) * PAGE_SIZE);
                 cb->fill(cb, "active_file", (active_file) * PAGE_SIZE);
                 cb->fill(cb, "inactive_file", (inactive_file) * PAGE_SIZE);
+                cb->fill(cb, "unevictable", unevictable * PAGE_SIZE);
+
         }
         return 0;
 }