]> git.karo-electronics.de Git - mv-sheeva.git/commit
memcg: condense page_cgroup-to-page lookup points
authorJohannes Weiner <hannes@cmpxchg.org>
Wed, 23 Mar 2011 23:42:29 +0000 (16:42 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 24 Mar 2011 02:46:27 +0000 (19:46 -0700)
commit5564e88ba6fd2f6dcd83a592771810cd84b5ae80
treee2b3a0835067825308a254c7531c891d4d69e701
parentde3638d9cdc89ac899225996b8dcedbcbc53bdd2
memcg: condense page_cgroup-to-page lookup points

The per-cgroup LRU lists string up 'struct page_cgroup's.  To get from
those structures to the page they represent, a lookup is required.
Currently, the lookup is done through a direct pointer in struct
page_cgroup, so a lot of functions down the callchain do this lookup by
themselves instead of receiving the page pointer from their callers.

The next patch removes this pointer, however, and the lookup is no longer
that straight-forward.  In preparation for that, this patch only leaves
the non-optional lookups when coming directly from the LRU list and passes
the page down the stack.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/memcontrol.c