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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 925b767 ("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 <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Acked-by: KAMEZAWA Hiroyuki <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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yinghan authored and torvalds committed Apr 12, 2012
1 parent 4585276 commit 6252efc
Showing 1 changed file with 2 additions and 3 deletions.
5 changes: 2 additions & 3 deletions Documentation/cgroups/memory.txt
Original file line number Diff line number Diff line change
Expand Up @@ -34,8 +34,7 @@ Current Status: linux-2.6.34-mmotm(development version of 2010/April)

Features:
- accounting anonymous pages, file caches, swap caches usage and limiting them.
- private LRU and reclaim routine. (system's global LRU and private LRU
work independently from each other)
- pages are linked to per-memcg LRU exclusively, and there is no global LRU.
- optionally, memory+swap usage can be accounted and limited.
- hierarchical accounting
- soft limit
Expand Down Expand Up @@ -154,7 +153,7 @@ updated. page_cgroup has its own LRU on cgroup.
2.2.1 Accounting details

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.

RSS pages are accounted at page_fault unless they've already been accounted
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