From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753361AbaEMPTO (ORCPT ); Tue, 13 May 2014 11:19:14 -0400 Received: from mail-qg0-f49.google.com ([209.85.192.49]:50667 "EHLO mail-qg0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753015AbaEMPTK (ORCPT ); Tue, 13 May 2014 11:19:10 -0400 Date: Tue, 13 May 2014 11:19:07 -0400 From: Tejun Heo To: Li Zefan Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 5/7] cgroup: use restart_syscall() for retries after offline waits in cgroup_subtree_control_write() Message-ID: <20140513151907.GF23710@htj.dyndns.org> References: <1399663975-315-1-git-send-email-tj@kernel.org> <1399663975-315-6-git-send-email-tj@kernel.org> <5371A6DB.2050908@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5371A6DB.2050908@huawei.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, May 13, 2014 at 01:00:11PM +0800, Li Zefan wrote: > Hi Tejun, > > On 2014/5/10 3:32, Tejun Heo wrote: > > After waiting for a child to finish offline, > > cgroup_subtree_control_write() jumps up to retry from after the input > > parsing and active protection breaking. This retry makes the > > scheduled locking update more difficult. > > Could you explain this sentence more specific? I don't understand what > "scheduled locking update" means. Updating it to "planned cgroup_tree_mutex removal". Thanks. -- tejun