From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wanpeng Li Subject: [PATCH v3 3/4] memcg: optimize memcg_get_hierarchical_limit Date: Mon, 25 Jun 2012 16:44:32 +0800 Message-ID: <1340613872-9581-1-git-send-email-liwp.linux@gmail.com> Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer; bh=0ZYakQ3oelabxHywtNMhVOpQbqbC9UkOwQZG0dU6bV4=; b=sAkQq8wVds9ust6zcYc4t6Hv0FjESUTB1gUXbXSJ7QbKVR59TYF3FQ/vN+fsDDasHU UCM3nPs3zwDfG6cEOoIGMs4vwiKa7CfK7MNxIloFs6Fc3K33hYN6zuxmUKxBAK9okBeC 8j4YQgugRuO2t8OmKf9p99hfnpx93XvvTYTk4/UlhHjmsrlY8V4K597ut7wEdtV8zePD zSk2ILazNT4eCtGw6h65Sg7nBSh/sYUAU6sgP5odJ7Tc9o5sM2SvM9LOnlqjARyFt1YG 8McjGtvt0HJReQAmM+wId6IJyLt7M8jyv/3ICLV/DWZKrAzGSUCKNbs1KtQhnJVoCCUi 240Q== Sender: cgroups-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Michal Hocko Cc: Johannes Weiner , KAMEZAWA Hiroyuki , Balbir Singh , Andrew Morton , Eric Dumazet , Mike Frysinger , Arun Sharma , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Wanpeng Li From: Wanpeng Li Optimize memcg_get_hierarchical_limit to save cpu cycle. 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 2e81328..4520b57 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3917,9 +3917,9 @@ static void memcg_get_hierarchical_limit(struct mem_cgroup *memcg, min_limit = res_counter_read_u64(&memcg->res, RES_LIMIT); min_memsw_limit = res_counter_read_u64(&memcg->memsw, RES_LIMIT); - cgroup = memcg->css.cgroup; if (!memcg->use_hierarchy) goto out; + cgroup = memcg->css.cgroup; while (cgroup->parent) { cgroup = cgroup->parent; -- 1.7.9.5