From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751461AbcCKKLk (ORCPT ); Fri, 11 Mar 2016 05:11:40 -0500 Received: from mx2.parallels.com ([199.115.105.18]:50850 "EHLO mx2.parallels.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750803AbcCKKLd (ORCPT ); Fri, 11 Mar 2016 05:11:33 -0500 From: Vladimir Davydov To: Andrew Morton CC: Johannes Weiner , Michal Hocko , , Subject: [PATCH] mm: memcontrol: zap oom_info_lock Date: Fri, 11 Mar 2016 13:11:23 +0300 Message-ID: <1457691083-22655-1-git-send-email-vdavydov@virtuozzo.com> X-Mailer: git-send-email 2.1.4 MIME-Version: 1.0 Content-Type: text/plain X-ClientProxiedBy: US-EXCH2.sw.swsoft.com (10.255.249.46) To US-EXCH2.sw.swsoft.com (10.255.249.46) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org mem_cgroup_print_oom_info is always called under oom_lock, so oom_info_lock is redundant. Signed-off-by: Vladimir Davydov --- mm/memcontrol.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index fa7bf354ae32..36db05fa8acb 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1150,12 +1150,9 @@ static bool mem_cgroup_wait_acct_move(struct mem_cgroup *memcg) */ void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) { - /* oom_info_lock ensures that parallel ooms do not interleave */ - static DEFINE_MUTEX(oom_info_lock); struct mem_cgroup *iter; unsigned int i; - mutex_lock(&oom_info_lock); rcu_read_lock(); if (p) { @@ -1199,7 +1196,6 @@ void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) pr_cont("\n"); } - mutex_unlock(&oom_info_lock); } /* -- 2.1.4