Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751864Ab2FRNKo (ORCPT ); Mon, 18 Jun 2012 09:10:44 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:63022 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750992Ab2FRNKn (ORCPT ); Mon, 18 Jun 2012 09:10:43 -0400 From: Wanpeng Li 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 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> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1020 Lines: 32 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/