From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757324AbZFYGLf (ORCPT ); Thu, 25 Jun 2009 02:11:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750775AbZFYGL2 (ORCPT ); Thu, 25 Jun 2009 02:11:28 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:59196 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1750731AbZFYGL2 (ORCPT ); Thu, 25 Jun 2009 02:11:28 -0400 Message-ID: <4A43154A.2010407@cn.fujitsu.com> Date: Thu, 25 Jun 2009 14:12:26 +0800 From: Li Zefan User-Agent: Thunderbird 2.0.0.9 (X11/20071115) MIME-Version: 1.0 To: Andrew Morton CC: Nikanth Karthikesan , Paul Menage , LKML Subject: [PATCH][resend] cpusets: document adding/removing cpus to cpuset elaborately Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Writing a pid to the file, tasks adds that task to that cgroup/cpuset. But to add a cpu/mem to a cpuset, the new list of cpus should be written to the cpuset.mems file which would replace the old list of cpus. Make this clearer in the documentation. Signed-off-by: Nikanth Karthikesan Acked-by: Li Zefan Acked-by: Paul Menage --- Documentation/cgroups/cpusets.txt | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/Documentation/cgroups/cpusets.txt b/Documentation/cgroups/cpusets.txt index f9ca389..1d7e978 100644 --- a/Documentation/cgroups/cpusets.txt +++ b/Documentation/cgroups/cpusets.txt @@ -777,6 +777,18 @@ in cpuset directories: # /bin/echo 1-4 > cpus -> set cpus list to cpus 1,2,3,4 # /bin/echo 1,2,3,4 > cpus -> set cpus list to cpus 1,2,3,4 +To add a CPU to a cpuset, write the new list of CPUs including the +CPU to be added. To add 6 to the above cpuset: + +# /bin/echo 1-4,6 > cpus -> set cpus list to cpus 1,2,3,4,6 + +Similarly to remove a CPU from a cpuset, write the new list of CPUs +without the CPU to be removed. + +To remove all the CPUs: + +# /bin/echo "" > cpus -> clear cpus list + 2.3 Setting flags -----------------