Commit 0527b690 authored by Ying Han's avatar Ying Han Committed by Linus Torvalds
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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: default avatarYing Han <yinghan@google.com>
Acked-by: default avatarKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
Acked-by: default avatarMichal Hocko <mhocko@suse.cz>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent d66c1ce7

Documentation/cgroups/memory.txt

+5 −2
Original line number Diff line number Diff line
@@ -410,8 +410,11 @@ 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.

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