Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751815Ab0DMII3 (ORCPT ); Tue, 13 Apr 2010 04:08:29 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:53217 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1751403Ab0DMII2 (ORCPT ); Tue, 13 Apr 2010 04:08:28 -0400 Message-ID: <4BC42656.4080902@cn.fujitsu.com> Date: Tue, 13 Apr 2010 16:07:50 +0800 From: Gui Jianfeng User-Agent: Thunderbird 2.0.0.24 (Windows/20100228) MIME-Version: 1.0 To: Jens Axboe , Vivek Goyal CC: Chad Talbott , Divyesh Shah , linux kernel mailing list Subject: [PATCH 2/2 V3] [RESEND] io-controller: Document for blkio.weight_device References: <4BC42475.8080605@cn.fujitsu.com> In-Reply-To: <4BC42475.8080605@cn.fujitsu.com> 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 Content-Length: 2100 Lines: 62 Here is the document for blkio.weight_device Signed-off-by: Gui Jianfeng Acked-by: Vivek Goyal --- Documentation/cgroups/blkio-controller.txt | 31 +++++++++++++++++++++++++++- 1 files changed, 30 insertions(+), 1 deletions(-) diff --git a/Documentation/cgroups/blkio-controller.txt b/Documentation/cgroups/blkio-controller.txt index db054ea..a4ce8fe 100644 --- a/Documentation/cgroups/blkio-controller.txt +++ b/Documentation/cgroups/blkio-controller.txt @@ -76,9 +76,38 @@ CONFIG_DEBUG_BLK_CGROUP Details of cgroup files ======================= - blkio.weight - - Specifies per cgroup weight. + - Specifies per cgroup weight. This is default weight of the group + on all the devices until and unless overridden by per device rule. + (See blkio.weight_device). Currently allowed range of weights is from 100 to 1000. +- blkio.weight_device + - One can specify per cgroup per device rules using this interface. + These rules override the default value of group weight as specified + by blkio.weight. + + Following is the format. + + #echo dev_maj:dev_minor weight > /path/to/cgroup/blkio.weight_device + Configure weight=300 on /dev/sdb (8:16) in this cgroup + # echo 8:16 300 > blkio.weight_device + # cat blkio.weight_device + dev weight + 8:16 300 + + Configure weight=500 on /dev/sda (8:0) in this cgroup + # echo 8:0 500 > blkio.weight_device + # cat blkio.weight_device + dev weight + 8:0 500 + 8:16 300 + + Remove specific weight for /dev/sda in this cgroup + # echo 8:0 0 > blkio.weight_device + # cat blkio.weight_device + dev weight + 8:16 300 + - blkio.time - disk time allocated to cgroup per device in milliseconds. First two fields specify the major and minor number of the device and -- 1.5.4.rc3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/