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authorDaniel Wagner <daniel.wagner@bmw-carit.de>2012-07-10 10:49:18 +0200
committerTejun Heo <tj@kernel.org>2012-07-17 11:10:52 -0700
commit9a8054aa5d7a98106f72d9ab76e26ebd42320ee0 (patch)
tree5d6cd892ac6a6b486b41aa7a5cf65f24a06f70fe /Documentation/cgroups
parentce27e317ba22b359bde02216afab934dac3af095 (diff)
downloadlinux-9a8054aa5d7a98106f72d9ab76e26ebd42320ee0.tar.gz
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: Daniel Wagner <daniel.wagner@bmw-carit.de> Signed-off-by: Tejun 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>
Diffstat (limited to 'Documentation/cgroups')
-rw-r--r--Documentation/cgroups/cgroups.txt15
1 files changed, 6 insertions, 9 deletions
diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt
index 97a0d1a6a5a..4a0b64c605f 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" \