memcg: document cgroup dirty/writeback memory statistics

[cascardo/linux.git] / Documentation / cgroups / memory.txt

diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt
index 2a33306..8af4ad1 100644 (file)
--- a/Documentation/cgroups/memory.txt
+++ b/Documentation/cgroups/memory.txt
@@ -490,6 +490,8 @@ pgpgin              - # of charging events to the memory cgroup. The charging
 pgpgout                - # of uncharging events to the memory cgroup. The uncharging
                event happens each time a page is unaccounted from the cgroup.
 swap           - # of bytes of swap usage
+writeback      - # of bytes of file/anon cache that are queued for syncing to
+               disk.
 inactive_anon  - # of bytes of anonymous and swap cache memory on inactive
                LRU list.
 active_anon    - # of bytes of anonymous and swap cache memory on active