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authorLi Zefan <lizf@cn.fujitsu.com>2009-01-07 21:07:32 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-08 11:31:01 -0500
commit18e7f1f0d34be4a39f7f47324a3e26b43fddb714 (patch)
tree91ac7e598579b6a2eff140cb1478d198557afc2c /Documentation
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>
Diffstat (limited to 'Documentation')
-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 d9014aa0eb68..60287e9e9d27 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
227containing the following files describing that cgroup: 227containing the following files describing that cgroup:
228 228
229 - tasks: list of tasks (by pid) attached to that cgroup 229 - tasks: list of tasks (by pid) attached to that cgroup
230 - releasable flag: cgroup currently removeable?
231 - notify_on_release flag: run the release agent on exit? 230 - notify_on_release flag: run the release agent on exit?
232 - release_agent: the path to use for release notifications (this file 231 - release_agent: the path to use for release notifications (this file
233 exists in the top cgroup only) 232 exists in the top cgroup only)
@@ -360,7 +359,7 @@ Now you want to do something with this cgroup.
360 359
361In this directory you can find several files: 360In this directory you can find several files:
362# ls 361# ls
363notify_on_release releasable tasks 362notify_on_release tasks
364(plus whatever files added by the attached subsystems) 363(plus whatever files added by the attached subsystems)
365 364
366Now attach your shell to this cgroup: 365Now attach your shell to this cgroup:
@@ -479,7 +478,6 @@ newly-created cgroup if an error occurs after this subsystem's
479create() method has been called for the new cgroup). 478create() method has been called for the new cgroup).
480 479
481void pre_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp); 480void pre_destroy(struct cgroup_subsys *ss, struct cgroup *cgrp);
482(cgroup_mutex held by caller)
483 481
484Called before checking the reference count on each subsystem. This may 482Called before checking the reference count on each subsystem. This may
485be useful for subsystems which have some extra references even if 483be useful for subsystems which have some extra references even if
@@ -498,6 +496,7 @@ remain valid while the caller holds cgroup_mutex.
498 496
499void attach(struct cgroup_subsys *ss, struct cgroup *cgrp, 497void attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
500 struct cgroup *old_cgrp, struct task_struct *task) 498 struct cgroup *old_cgrp, struct task_struct *task)
499(cgroup_mutex held by caller)
501 500
502Called after the task has been attached to the cgroup, to allow any 501Called after the task has been attached to the cgroup, to allow any
503post-attachment activity that requires memory allocations or blocking. 502post-attachment activity that requires memory allocations or blocking.
@@ -511,6 +510,7 @@ void exit(struct cgroup_subsys *ss, struct task_struct *task)
511Called during task exit. 510Called during task exit.
512 511
513int populate(struct cgroup_subsys *ss, struct cgroup *cgrp) 512int populate(struct cgroup_subsys *ss, struct cgroup *cgrp)
513(cgroup_mutex held by caller)
514 514
515Called after creation of a cgroup to allow a subsystem to populate 515Called after creation of a cgroup to allow a subsystem to populate
516the cgroup directory with file entries. The subsystem should make 516the 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
520always handled well. 520always handled well.
521 521
522void post_clone(struct cgroup_subsys *ss, struct cgroup *cgrp) 522void post_clone(struct cgroup_subsys *ss, struct cgroup *cgrp)
523(cgroup_mutex held by caller)
523 524
524Called at the end of cgroup_clone() to do any paramater 525Called at the end of cgroup_clone() to do any paramater
525initialization which might be required before a task could attach. For 526initialization which might be required before a task could attach. For