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memcg: fix up documentation on global LRU

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In v3.3-rc1, the global LRU was removed in commit 925b7673cc ("mm:
make per-memcg LRU lists exclusive").  The patch fixes up the memcg
docs.

I left the swap session to someone who has better understanding of
'memory+swap'.

Signed-off-by: Ying Han <yinghan@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ying Han 2012-04-12 12:49:10 -07:00 • committed by Linus Torvalds
parent 45852766a0
commit 6252efcc36
1 changed files with 2 additions and 3 deletions
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5
Documentation/cgroups/memory.txt
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@ -34,8 +34,7 @@ Current Status: linux-2.6.34-mmotm(development version of 2010/April)
Features: Features:
- accounting anonymous pages, file caches, swap caches usage and limiting them. - accounting anonymous pages, file caches, swap caches usage and limiting them.
- private LRU and reclaim routine. (system's global LRU and private LRU - pages are linked to per-memcg LRU exclusively, and there is no global LRU.
work independently from each other)
- optionally, memory+swap usage can be accounted and limited. - optionally, memory+swap usage can be accounted and limited.
- hierarchical accounting - hierarchical accounting
- soft limit - soft limit
@ -154,7 +153,7 @@ updated. page_cgroup has its own LRU on cgroup.
2.2.1 Accounting details 2.2.1 Accounting details
All mapped anon pages (RSS) and cache pages (Page Cache) are accounted. All mapped anon pages (RSS) and cache pages (Page Cache) are accounted.
Some pages which are never reclaimable and will not be on the global LRU Some pages which are never reclaimable and will not be on the LRU
are not accounted. We just account pages under usual VM management. are not accounted. We just account pages under usual VM management.
RSS pages are accounted at page_fault unless they've already been accounted RSS pages are accounted at page_fault unless they've already been accounted