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authorLi Zefan <lizf@cn.fujitsu.com>2009-01-07 18:07:32 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-08 08:31:01 -0800
commit18e7f1f0d34be4a39f7f47324a3e26b43fddb714 (patch)
tree91ac7e598579b6a2eff140cb1478d198557afc2c
parent5cdc38f98596662620b822a4e13f797c3f2f65e0 (diff)
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> Cc: Paul Menage <menage@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--Documentation/cgroups/cgroups.txt7
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt
index d9014aa0eb6..60287e9e9d2 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