From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Wagner Subject: [PATCH] cgroup: Update remount documentation Date: Tue, 10 Jul 2012 10:49:18 +0200 Message-ID: <1341910158-8994-1-git-send-email-wagi@monom.org> Return-path: Sender: cgroups-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Daniel Wagner , Rob Landley , Tejun Heo , Paul Menage , Li Zefan , Frederic Weisbecker , KAMEZAWA Hiroyuki From: Daniel Wagner Remounting support will be removed in the future (see feature-removal-schedule.txt). Discourage users to use it. Signed-off-by: Daniel Wagner Cc: Rob Landley Cc: Tejun Heo Cc: Paul Menage Cc: Li Zefan Cc: Frederic Weisbecker Cc: KAMEZAWA Hiroyuki --- Hi, while I am at it, the remount stuff should propapbly be removed from the docucmetation as well. cheers, daniel Documentation/cgroups/cgroups.txt | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt index ed2ba6c..d12f2d0 100644 --- a/Documentation/cgroups/cgroups.txt +++ b/Documentation/cgroups/cgroups.txt @@ -370,15 +370,12 @@ To mount a cgroup hierarchy with just the cpuset and memory subsystems, type: # mount -t cgroup -o cpuset,memory hier1 /sys/fs/cgroup/rg1 -To change the set of subsystems bound to a mounted hierarchy, just -remount with different options: -# mount -o remount,cpuset,blkio hier1 /sys/fs/cgroup/rg1 - -Now memory is removed from the hierarchy and blkio is added. - -Note this will add blkio to the hierarchy but won't remove memory or -cpuset, because the new options are appended to the old ones: -# mount -o remount,blkio /sys/fs/cgroup/rg1 +While remounting cgroups is currently supported, it is not recommend +to use it. Remounting allows changing bound subsystems and +release_agent. Rebinding is hardly useful as it only works when the +hierarchy is empty and release_agent itself should be replaced with +conventional fsnotify. The support for remounting will be removed in +the future. To Specify a hierarchy's release_agent: # mount -t cgroup -o cpuset,release_agent="/sbin/cpuset_release_agent" \ -- 1.7.11.1.104.ge7b44f1