mem_cgroup_disabled() should be checked at splitting. If disabled, no
heavy work is necesary.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Reviewed-by: Johannes Weiner <hannes@cmpxchg.org>
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>
struct page_cgroup *tail_pc = lookup_page_cgroup(tail);
unsigned long flags;
+ if (mem_cgroup_disabled())
+ return;
/*
* We have no races with charge/uncharge but will have races with
* page state accounting.