]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
memcg: use CSS ID
authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Thu, 2 Apr 2009 23:57:33 +0000 (16:57 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 3 Apr 2009 02:04:55 +0000 (19:04 -0700)
commit04046e1a0a34286382e913f8fc461440c21d88e8
treecab2b8a61e7474d509fbd3ea02e38b7c4137ce4b
parentb4046f00ee7c1e5615261b496cf7309683275b29
memcg: use CSS ID

Assigning CSS ID for each memcg and use css_get_next() for scanning hierarchy.

Assume folloing tree.

group_A (ID=3)
/01 (ID=4)
   /0A (ID=7)
/02 (ID=10)
group_B (ID=5)
and task in group_A/01/0A hits limit at group_A.

reclaim will be done in following order (round-robin).
group_A(3) -> group_A/01 (4) -> group_A/01/0A (7) -> group_A/02(10)
-> group_A -> .....

Round robin by ID. The last visited cgroup is recorded and restart
from it when it start reclaim again.
(More smart algorithm can be implemented..)

No cgroup_mutex or hierarchy_mutex is required.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Paul Menage <menage@google.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/memcontrol.c