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authorRami Rosen <ramirose@gmail.com>2013-04-10 14:41:17 +0300
committerTejun Heo <tj@kernel.org>2013-04-10 10:46:59 -0700
commit84cfb6ab484b442d5115eb3baf9db7d74a3ea626 (patch)
tree3a3d52372b7b6f0e42662103baa8f0ef24789bf2 /Documentation/cgroups
parent8adf12b0ffd0a10340bab355e586f8533a69630d (diff)
downloadlinux-84cfb6ab484b442d5115eb3baf9db7d74a3ea626.tar.gz
cgroup: remove bind() method from cgroup_subsys.
The bind() method of cgroup_subsys is not used in any of the controllers (cpuset, freezer, blkio, net_cls, memcg, net_prio, devices, perf, hugetlb, cpu and cpuacct) tj: Removed the entry on ->bind() from Documentation/cgroups/cgroups.txt. Also updated a couple paragraphs which were suggesting that dynamic re-binding may be implemented. It's not gonna. Signed-off-by: Rami Rosen <ramirose@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'Documentation/cgroups')
-rw-r--r--Documentation/cgroups/cgroups.txt20
1 files changed, 5 insertions, 15 deletions
diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt
index 638bf17ff86..2b51e12ce17 100644
--- a/Documentation/cgroups/cgroups.txt
+++ b/Documentation/cgroups/cgroups.txt
@@ -211,10 +211,9 @@ matches, and any of the requested subsystems are in use in an existing
hierarchy, the mount will fail with -EBUSY. Otherwise, a new hierarchy
is activated, associated with the requested subsystems.
-It's not currently possible to bind a new subsystem to an active
-cgroup hierarchy, or to unbind a subsystem from an active cgroup
-hierarchy. This may be possible in future, but is fraught with nasty
-error-recovery issues.
+It's not possible to bind a new subsystem to an active cgroup
+hierarchy, or to unbind a subsystem from an active cgroup
+hierarchy.
When a cgroup filesystem is unmounted, if there are any
child cgroups created below the top-level cgroup, that hierarchy
@@ -382,10 +381,8 @@ To Specify a hierarchy's release_agent:
Note that specifying 'release_agent' more than once will return failure.
-Note that changing the set of subsystems is currently only supported
-when the hierarchy consists of a single (root) cgroup. Supporting
-the ability to arbitrarily bind/unbind subsystems from an existing
-cgroup hierarchy is intended to be implemented in the future.
+Note that changing the set of subsystems is only supported when the
+hierarchy consists of a single (root) cgroup.
Then under /sys/fs/cgroup/rg1 you can find a tree that corresponds to the
tree of the cgroups in the system. For instance, /sys/fs/cgroup/rg1
@@ -643,13 +640,6 @@ void exit(struct task_struct *task)
Called during task exit.
-void bind(struct cgroup *root)
-(cgroup_mutex held by caller)
-
-Called when a cgroup subsystem is rebound to a different hierarchy
-and root cgroup. Currently this will only involve movement between
-the default hierarchy (which never has sub-cgroups) and a hierarchy
-that is being created/destroyed (and hence has no sub-cgroups).
4. Extended attribute usage
===========================