From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx143.postini.com [74.125.245.143]) by kanga.kvack.org (Postfix) with SMTP id ACCF96B004D for ; Mon, 18 Jun 2012 09:10:43 -0400 (EDT) Received: by dakp5 with SMTP id p5so8617706dak.14 for ; Mon, 18 Jun 2012 06:10:42 -0700 (PDT) From: Wanpeng Li Subject: [PATCH] mm/memcg: add unlikely to mercg->move_charge_at_immigrate Date: Mon, 18 Jun 2012 21:10:21 +0800 Message-Id: <1340025022-7272-1-git-send-email-liwp.linux@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: Johannes Weiner , Michal Hocko , Balbir Singh , KAMEZAWA Hiroyuki Cc: cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Gavin Shan , Wanpeng Li From: Wanpeng Li move_charge_at_immigrate feature is disabled by default. Charges are moved only when you move mm->owner and it also add additional overhead. Signed-off-by: Wanpeng Li --- mm/memcontrol.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index a9c3d01..795a00f 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5316,7 +5316,7 @@ static int mem_cgroup_can_attach(struct cgroup *cgroup, int ret = 0; struct mem_cgroup *memcg = mem_cgroup_from_cont(cgroup); - if (memcg->move_charge_at_immigrate) { + if (unlikely(memcg->move_charge_at_immigrate)) { struct mm_struct *mm; struct mem_cgroup *from = mem_cgroup_from_task(p); -- 1.7.9.5 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org