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Subject[PATCH] cgroups: documentation updates
- remove 'releasable' since it has been moved to the debug subsys.
- update lock requirements of subsys callbacks.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
---
Documentation/cgroups/cgroups.txt | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt
index d9014aa..60287e9 100644
--- a/Documentation/cgroups/cgroups.txt
+++ b/Documentation/cgroups/cgroups.txt
@@ -227,7 +227,6 @@ Each cgroup is represented by a directory in the cgroup file system
containing the following files describing that cgroup:

- tasks: list of tasks (by pid) attached to that cgroup
- - releasable flag: cgroup currently removeable?
- notify_on_release flag: run the release agent on exit?
- release_agent: the path to use for release notifications (this file
exists in the top cgroup only)
@@ -360,7 +359,7 @@ Now you want to do something with this cgroup.

In this directory you can find several files:
# ls
-notify_on_release releasable tasks
+notify_on_release tasks
(plus whatever files added by the attached subsystems)

Now attach your shell to this cgroup:
@@ -479,7 +478,6 @@ newly-created cgroup if an error occurs after this subsystem's
create() method has been called for the new cgroup).

void pre_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp);
-(cgroup_mutex held by caller)

Called before checking the reference count on each subsystem. This may
be useful for subsystems which have some extra references even if
@@ -498,6 +496,7 @@ remain valid while the caller holds cgroup_mutex.

void attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
struct cgroup *old_cgrp, struct task_struct *task)
+(cgroup_mutex held by caller)

Called after the task has been attached to the cgroup, to allow any
post-attachment activity that requires memory allocations or blocking.
@@ -511,6 +510,7 @@ void exit(struct cgroup_subsys *ss, struct task_struct *task)
Called during task exit.

int populate(struct cgroup_subsys *ss, struct cgroup *cgrp)
+(cgroup_mutex held by caller)

Called after creation of a cgroup to allow a subsystem to populate
the cgroup directory with file entries. The subsystem should make
@@ -520,6 +520,7 @@ method can return an error code, the error code is currently not
always handled well.

void post_clone(struct cgroup_subsys *ss, struct cgroup *cgrp)
+(cgroup_mutex held by caller)

Called at the end of cgroup_clone() to do any paramater
initialization which might be required before a task could attach. For
--
1.5.4.rc3

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