From: Ying Han Date: Thu, 8 Dec 2011 04:42:45 +0000 (+1100) Subject: memcg: fix pgpgin/pgpgout documentation X-Git-Tag: next-20111212~1^2~42 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1c9bd5b90e42d51fc26a3e341f62475d13293674;p=karo-tx-linux.git memcg: fix pgpgin/pgpgout documentation The two memcg stats pgpgin/pgpgout have different meaning than the ones in vmstat, which indicates that we picked a bad naming for them. It might be late to change the stat name, but better documentation is always helpful. Signed-off-by: Ying Han Acked-by: KAMEZAWA Hiroyuki Acked-by: Johannes Weiner Signed-off-by: Andrew Morton --- diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt index 0f6b0f32c65d..09a94728005c 100644 --- a/Documentation/cgroups/memory.txt +++ b/Documentation/cgroups/memory.txt @@ -386,8 +386,11 @@ memory.stat file includes following statistics cache - # of bytes of page cache memory. rss - # of bytes of anonymous and swap cache memory. mapped_file - # of bytes of mapped file (includes tmpfs/shmem) -pgpgin - # of pages paged in (equivalent to # of charging events). -pgpgout - # of pages paged out (equivalent to # of uncharging events). +pgpgin - # of charging events to the memory cgroup. The charging + event happens each time a page is accounted as either mapped + anon page(RSS) or cache page(Page Cache) to the cgroup. +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 inactive_anon - # of bytes of anonymous memory and swap cache memory on LRU list.