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authorJohannes Weiner <hannes@cmpxchg.org>2017-05-04 00:52:45 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-05-04 01:52:08 +0300
commit9a4caf1e9fa4864ce21ba9584a2c336bfbc72740 (patch)
tree6e4ca5d6040d341fa03541e4c7f14279ab620e7f /Documentation
parentcf8496ea8020792ea32d0fbec0c140d8de93011a (diff)
downloadlinux-9a4caf1e9fa4864ce21ba9584a2c336bfbc72740.tar.xz
mm: memcontrol: provide shmem statistics
Cgroups currently don't report how much shmem they use, which can be useful data to have, in particular since shmem is included in the cache/file item while being reclaimed like anonymous memory. Add a counter to track shmem pages during charging and uncharging. Link: http://lkml.kernel.org/r/20170221164343.32252-1-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reported-by: Chris Down <cdown@fb.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/cgroup-v2.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/cgroup-v2.txt b/Documentation/cgroup-v2.txt
index 49d7c997fa1e..e50b95c25868 100644
--- a/Documentation/cgroup-v2.txt
+++ b/Documentation/cgroup-v2.txt
@@ -871,6 +871,11 @@ PAGE_SIZE multiple when read back.
Amount of memory used in network transmission buffers
+ shmem
+
+ Amount of cached filesystem data that is swap-backed,
+ such as tmpfs, shm segments, shared anonymous mmap()s
+
file_mapped
Amount of cached filesystem data mapped with mmap()