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mm, memcg: add rss_huge stat to memory.stat

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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>
This commit is contained in:
David Rientjes
2013-05-07 16:18:09 -07:00
committed by Linus Torvalds
parent 70affe4520
commit b070e65c0b
2 changed files with 29 additions and 11 deletions
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Documentation/cgroups/memory.txt
+3 -1
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@@ -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