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| author | Ying Han <yinghan@google.com> | 2012-01-12 17:18:27 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-12 20:13:06 -0800 |
| commit | 0527b6903b2838e214c895d527806aefd61b3c8f (patch) | |
| tree | d9f3eebcf0e43d927ad3a12da1f4dfe56a27c014 /Documentation/cgroups/memory.txt | |
| parent | d66c1ce7df6ceb94d1902ac865ad50df4ffdb95f (diff) | |
| download | linux-0527b6903b2838e214c895d527806aefd61b3c8f.tar.gz linux-0527b6903b2838e214c895d527806aefd61b3c8f.tar.bz2 linux-0527b6903b2838e214c895d527806aefd61b3c8f.zip | |
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 <yinghan@google.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/cgroups/memory.txt')
| -rw-r--r-- | Documentation/cgroups/memory.txt | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/Documentation/cgroups/memory.txt b/Documentation/cgroups/memory.txt index c7de7dac43b5..4c95c0034a4b 100644 --- a/Documentation/cgroups/memory.txt +++ b/Documentation/cgroups/memory.txt @@ -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. |