From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752734AbbIWHpY (ORCPT ); Wed, 23 Sep 2015 03:45:24 -0400 Received: from mail-wi0-f173.google.com ([209.85.212.173]:36209 "EHLO mail-wi0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751921AbbIWHpW (ORCPT ); Wed, 23 Sep 2015 03:45:22 -0400 Date: Wed, 23 Sep 2015 09:45:19 +0200 From: Michal Hocko To: Greg Thelen Cc: Johannes Weiner , Andrew Morton , Vladimir Davydov , Tejun Heo , linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH] memcg: remove pcp_counter_lock Message-ID: <20150923074518.GC6283@dhcp22.suse.cz> References: <1442976106-49685-1-git-send-email-gthelen@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1442976106-49685-1-git-send-email-gthelen@google.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue 22-09-15 19:41:46, Greg Thelen wrote: > Commit 733a572e66d2 ("memcg: make mem_cgroup_read_{stat|event}() iterate > possible cpus instead of online") removed the last use of the per memcg > pcp_counter_lock but forgot to remove the variable. > > Kill the vestigial variable. > > Signed-off-by: Greg Thelen Acked-by: Michal Hocko > --- > include/linux/memcontrol.h | 1 - > mm/memcontrol.c | 1 - > 2 files changed, 2 deletions(-) > > diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h > index ad800e62cb7a..6452ff4c463f 100644 > --- a/include/linux/memcontrol.h > +++ b/include/linux/memcontrol.h > @@ -242,7 +242,6 @@ struct mem_cgroup { > * percpu counter. > */ > struct mem_cgroup_stat_cpu __percpu *stat; > - spinlock_t pcp_counter_lock; > > #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_INET) > struct cg_proto tcp_mem; > diff --git a/mm/memcontrol.c b/mm/memcontrol.c > index 6ddaeba34e09..da21143550c0 100644 > --- a/mm/memcontrol.c > +++ b/mm/memcontrol.c > @@ -4179,7 +4179,6 @@ static struct mem_cgroup *mem_cgroup_alloc(void) > if (memcg_wb_domain_init(memcg, GFP_KERNEL)) > goto out_free_stat; > > - spin_lock_init(&memcg->pcp_counter_lock); > return memcg; > > out_free_stat: > -- > 2.6.0.rc0.131.gf624c3d -- Michal Hocko SUSE Labs