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Commit 9a8054aa authored by Daniel Wagner's avatar Daniel Wagner Committed by Tejun Heo
Browse files

cgroup: Update remount documentation 



Remounting support will be removed in the future (see
feature-removal-schedule.txt).  Discourage users from using it.

Signed-off-by: default avatarDaniel Wagner <daniel.wagner@bmw-carit.de>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Cc: Rob Landley <rob@landley.net>
Cc: Paul Menage <paul@paulmenage.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
parent ce27e317

Documentation/cgroups/cgroups.txt

+6 −9
Original line number Original line Diff line number Diff line
@@ -370,15 +370,12 @@ To mount a cgroup hierarchy with just the cpuset and memory 
subsystems, type:

subsystems, type:

# mount -t cgroup -o cpuset,memory hier1 /sys/fs/cgroup/rg1

# mount -t cgroup -o cpuset,memory hier1 /sys/fs/cgroup/rg1





To change the set of subsystems bound to a mounted hierarchy, just

While remounting cgroups is currently supported, it is not recommend

remount with different options:

to use it. Remounting allows changing bound subsystems and

# mount -o remount,cpuset,blkio hier1 /sys/fs/cgroup/rg1

release_agent. Rebinding is hardly useful as it only works when the



hierarchy is empty and release_agent itself should be replaced with

Now memory is removed from the hierarchy and blkio is added.

conventional fsnotify. The support for remounting will be removed in



the future.

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





To Specify a hierarchy's release_agent:

To Specify a hierarchy's release_agent:

# mount -t cgroup -o cpuset,release_agent="/sbin/cpuset_release_agent" \

# mount -t cgroup -o cpuset,release_agent="/sbin/cpuset_release_agent" \