From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755204Ab3KUCTR (ORCPT ); Wed, 20 Nov 2013 21:19:17 -0500 Received: from mail-pd0-f179.google.com ([209.85.192.179]:43865 "EHLO mail-pd0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754314Ab3KUCTN (ORCPT ); Wed, 20 Nov 2013 21:19:13 -0500 Message-ID: <528D6E19.4080100@gmail.com> Date: Thu, 21 Nov 2013 10:21:13 +0800 From: Chen Gang User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2 MIME-Version: 1.0 To: Tejun Heo CC: Chen Gang , Li Zefan , containers@lists.linux-foundation.org, cgroups@vger.kernel.org, "linux-kernel@vger.kernel.org" Subject: Re: [Suggestion] kernel: cgroup: mount failure in LTP cgroup_regression_test.sh References: <527C9D9B.8090802@asianux.com> <20131120173549.GO28946@htj.dyndns.org> In-Reply-To: <20131120173549.GO28946@htj.dyndns.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/21/2013 01:35 AM, Tejun Heo wrote: > Hello, > > Sorry about the delay. > Oh, No problem, every members time resources are expensive, thank you for your reply. > On Fri, Nov 08, 2013 at 04:15:23PM +0800, Chen Gang wrote: >> After simplify, the related operation, environments and output are: >> >> [root@gchenlinux tmp]# df -Th | grep cgroup >> tmpfs tmpfs 1001M 0 1001M 0% /sys/fs/cgroup >> [root@gchenlinux tmp]# lsof | grep cgroup | grep -v grep >> systemd 1 root 6r DIR 0,18 0 5998 /sys/fs/cgroup/systemd/system >> [root@gchenlinux tmp]# cat /proc/cgroups >> #subsys_name hierarchy num_cgroups enabled >> cpuset 3 4 1 >> cpu 4 35 1 >> cpuacct 4 35 1 >> freezer 5 4 1 >> [root@gchenlinux tmp]# mkdir cgroup >> [root@gchenlinux tmp]# mount -t cgroup -o freezer,cpuacct xxx cgroup/ >> mount: xxx already mounted or cgroup/ busy >> >> Is it real issue of cgroup? If it is, I will/should continue analyzing. > > Hmmm... I'm a bit confused. What is it testing? "cat /proc/cgroup" > is showing that freezer is already mounted and the kernel seems to > have correctly refused to mount it in a different hierarchy. What am > I missing here? > Hmm... I am not quit familiar about it, either, but at least I can contact related LTP members (I guess they can make sure about it). Excuse me, I am changing/finding new job, so I should not use Asianux Corporation mail again. And it seems I can not be focus on upstream kernel as much as before. :-( But at least, I will/should continue providing some contributions (more or less) to Public Open Source as volunteers. And for upstream kernel, I plan to make 1-3 patches per month (mainly for cross compiling). - if can not get companies support, I can not provide enough time resource on upstream kernel (I have to get pay check for family). - New company may mainly focus on open source tool chains (not only kernel), so I will/should also provide some contributions to them (e.g. KVM, GCC ...). At last, sorry again for I have to give up 10 patches per month for upstream kernel. Thanks. -- Chen Gang