From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754510Ab3ACWUu (ORCPT ); Thu, 3 Jan 2013 17:20:50 -0500 Received: from mail-ie0-f176.google.com ([209.85.223.176]:57846 "EHLO mail-ie0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754490Ab3ACWUs (ORCPT ); Thu, 3 Jan 2013 17:20:48 -0500 Date: Thu, 3 Jan 2013 17:20:39 -0500 From: Tejun Heo To: Li Zefan Cc: paul@paulmenage.org, glommer@parallels.com, containers@lists.linux-foundation.org, cgroups@vger.kernel.org, peterz@infradead.org, mhocko@suse.cz, bsingharora@gmail.com, hannes@cmpxchg.org, kamezawa.hiroyu@jp.fujitsu.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCHSET cgroup/for-3.8] cpuset: decouple cpuset locking from cgroup core Message-ID: <20130103222039.GD2753@mtj.dyndns.org> References: <1354138460-19286-1-git-send-email-tj@kernel.org> <50DAD696.8050400@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <50DAD696.8050400@huawei.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hey, Li. On Wed, Dec 26, 2012 at 06:51:02PM +0800, Li Zefan wrote: > I created a cpuset which has cpuset.cpus=1, and I forked a few cpu-hog tasks > and moved them to this cpuset, and the final operations was offlining cpu1. > It stucked. This was caused by not rebuilding sched domains synchronously from cpu offline path. I looks like scheduler got confused and put tasks on the dead cpu. Should be okay in the updated patchset. Can you please test / review that one? Thanks. -- tejun