path: root/Documentation
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authorDavid Rientjes <rientjes@google.com>2013-05-07 16:18:09 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-07 18:38:26 -0700
commitb070e65c0bb58d90fa1ac693dc85e239a6b16872 (patch)
tree8738b57c68ca2bb655dee5a152ed0152222ecfe5 /Documentation
parent70affe4520c6f22f5b22b58b589c6ebbe3f8cbc9 (diff)
mm, memcg: add rss_huge stat to memory.stat
This exports the amount of anonymous transparent hugepages for each memcg via the new "rss_huge" stat in memory.stat. The units are in bytes. This is helpful to determine the hugepage utilization for individual jobs on the system in comparison to rss and opportunities where MADV_HUGEPAGE may be helpful. The amount of anonymous transparent hugepages is also included in "rss" for backwards compatibility. Signed-off-by: David Rientjes <rientjes@google.com> Acked-by: Michal Hocko <mhocko@suse.cz> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt
index 09027a9fece..ddf4f93967a 100644
--- a/Documentation/cgroups/memory.txt
+++ b/Documentation/cgroups/memory.txt
@@ -480,7 +480,9 @@ memory.stat file includes following statistics
# per-memory cgroup local status
cache - # of bytes of page cache memory.
-rss - # of bytes of anonymous and swap cache memory.
+rss - # of bytes of anonymous and swap cache memory (includes
+ transparent hugepages).
+rss_huge - # of bytes of anonymous transparent hugepages.
mapped_file - # of bytes of mapped file (includes tmpfs/shmem)
pgpgin - # of charging events to the memory cgroup. The charging
event happens each time a page is accounted as either mapped