From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932764Ab0KLRN2 (ORCPT ); Fri, 12 Nov 2010 12:13:28 -0500 Received: from mail-qy0-f174.google.com ([209.85.216.174]:35494 "EHLO mail-qy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932475Ab0KLRN1 (ORCPT ); Fri, 12 Nov 2010 12:13:27 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:user-agent:date:message-id:mime-version :content-type; b=ibYPeQbU98/hl2BO5FSJzxP+nN2ewVGbJYoPIlafIi79BDelwPS0XigcwGbq5X87/+ 21bM9YirkZ7tODWEQIJa2qQ+YGzrQYhxTc+25axciLUESnGmcwg9f4vH12m99Khv0OYs sQUBSmlybJvFsckiusAvYUN0L3+9yziln8mV4= From: Ben Gamari To: Paul Menage , Li Zefan , containers@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org Subject: Mounting blkio cgroup hierarchy User-Agent: Notmuch/0.3.1-158-g04cd99c (http://notmuchmail.org) Emacs/23.1.1 (x86_64-pc-linux-gnu) Date: Fri, 12 Nov 2010 12:13:24 -0500 Message-ID: <87fwv6sbwr.fsf@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I've been trying to configure cgroups and have encountered some very strange behavior. In particular, when I follow the instructions in Documentation/cgroups/blkio-controller.txt I quickly reach an error, $ cd /mnt $ sudo mkdir -p cgroups/blkio $ # Confirm it's not already mounted: $ cat /proc/mounts rootfs / rootfs rw 0 0 none /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0 none /proc proc rw,nosuid,nodev,noexec,relatime 0 0 none /dev devtmpfs rw,relatime,size=1993264k,nr_inodes=498316,mode=755 0 0 none /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0 fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0 /dev/disk/by-uuid/7d908a9f-fe46-4a82-bb2b-3fc108c96280 / ext4 rw,relatime,errors=remount-ro,barrier=1,data=ordered 0 0 none /sys/kernel/debug debugfs rw,relatime 0 0 none /sys/kernel/security securityfs rw,relatime 0 0 none /dev/shm tmpfs rw,nosuid,nodev,relatime 0 0 none /var/run tmpfs rw,nosuid,relatime,mode=755 0 0 none /var/lock tmpfs rw,nosuid,nodev,noexec,relatime 0 0 /dev/sda1 /boot ext4 rw,relatime,barrier=1,data=ordered 0 0 binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,nosuid,nodev,noexec,relatime 0 0 gvfs-fuse-daemon /home/ben/.gvfs fuse.gvfs-fuse-daemon rw,nosuid,nodev,relatime,user_id=1000,group_id=1000 0 0 $ sudo mount -t cgroup -o blkio none /mnt/cgroups/blkio mount: special device none does not exist I've done quite a bit of Googling and yet it's very difficult to find good information on configuring cgroups. I would use the libcg toolset[1] but every attempt to configure it has ended in frustratingly vague error messages. Any ideas? Cheers, - Ben