|author||David Rientjes <email@example.com>||2013-05-07 16:18:09 -0700|
|committer||Linus Torvalds <firstname.lastname@example.org>||2013-05-07 18:38:26 -0700|
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 <email@example.com> Acked-by: Michal Hocko <firstname.lastname@example.org> Acked-by: Johannes Weiner <email@example.com> Cc: KAMEZAWA Hiroyuki <firstname.lastname@example.org> Signed-off-by: Andrew Morton <email@example.com> Signed-off-by: Linus Torvalds <firstname.lastname@example.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
@@ -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