memcg: reduce check for softlimit excess
authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Thu, 1 Oct 2009 22:44:12 +0000 (15:44 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 1 Oct 2009 23:11:13 +0000 (16:11 -0700)
commitef8745c1e7fc5413d760b3b958f3fd3a0beaad72
treea1f1998dbcf06e84fe3539192e440e9d1bb876f2
parent4e649152cbaa1aedd01821d200ab9d597fe469e4
memcg: reduce check for softlimit excess

In charge/uncharge/reclaim path, usage_in_excess is calculated repeatedly
and it takes res_counter's spin_lock every time.

This patch removes unnecessary calls for res_count_soft_limit_excess.

Reviewed-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/memcontrol.c