linux-toradex.git/include/linux/cgroup.h, branch v3.9-rc3

cgroup: remove synchronize_rcu() from cgroup_diput()

2013-01-24T20:05:18+00:00

Free cgroup via call_rcu(). The actual work is done through
workqueue.

Signed-off-by: Li Zefan 
Signed-off-by: Tejun Heo

cgroup: implement cgroup_rightmost_descendant()

2013-01-07T16:50:28+00:00

Implement cgroup_rightmost_descendant() which returns the right most
descendant of the specified cgroup.  This can be used to skip the
cgroup's subtree while iterating with
cgroup_for_each_descendant_pre().

Signed-off-by: Tejun Heo 
Acked-by: Michal Hocko 
Acked-by: Li Zefan

cgroup: remove unused dummy cgroup_fork_callbacks()

2013-01-07T16:49:16+00:00

5edee61ede ("cgroup: cgroup_subsys->fork() should be called after the
task is added to css_set") removed cgroup_fork_callbacks() but forgot
to remove its dummy version for !CONFIG_CGROUPS.  Remove it.

Signed-off-by: Tejun Heo 
Reported-by: Herton Ronaldo Krzesinski

cgroup: remove obsolete guarantee from cgroup_task_migrate.

2012-11-20T14:44:58+00:00

'guarantee' is already removed from cgroup_task_migrate, so remove
the corresponding comments. Some other typos in cgroup are also
changed.

Cc: Tejun Heo 
Cc: Li Zefan 
Signed-off-by: Tao Ma 
Signed-off-by: Tejun Heo

cgroup: add cgroup->id

2012-11-19T17:02:12+00:00

With the introduction of generic cgroup hierarchy iterators, css_id is
being phased out.  It was unnecessarily complex, id'ing the wrong
thing (cgroups need IDs, not CSSes) and has other oddities like not
being available at ->css_alloc().

This patch adds cgroup->id, which is a simple per-hierarchy
ida-allocated ID which is assigned before ->css_alloc() and released
after ->css_free().

Signed-off-by: Tejun Heo 
Acked-by: Li Zefan 
Acked-by: Neil Horman

cgroup, cpuset: remove cgroup_subsys->post_clone()

2012-11-19T16:13:39+00:00

Currently CGRP_CPUSET_CLONE_CHILDREN triggers ->post_clone().  Now
that clone_children is cpuset specific, there's no reason to have this
rather odd option activation mechanism in cgroup core.  cpuset can
check the flag from its ->css_allocate() and take the necessary
action.

Move cpuset_post_clone() logic to the end of cpuset_css_alloc() and
remove cgroup_subsys->post_clone().

Loosely based on Glauber's "generalize post_clone into post_create"
patch.

Signed-off-by: Tejun Heo 
Original-patch-by: Glauber Costa 
Original-patch: <1351686554-22592-2-git-send-email-glommer@parallels.com>
Acked-by: Serge E. Hallyn 
Acked-by: Li Zefan 
Cc: Glauber Costa

cgroup: s/CGRP_CLONE_CHILDREN/CGRP_CPUSET_CLONE_CHILDREN/

2012-11-19T16:13:38+00:00

clone_children is only meaningful for cpuset and will stay that way.
Rename the flag to reflect that and update documentation.  Also, drop
clone_children() wrapper in cgroup.c.  The thin wrapper is used only a
few times and one of them will go away soon.

Signed-off-by: Tejun Heo 
Acked-by: Serge E. Hallyn 
Acked-by: Li Zefan 
Cc: Glauber Costa

cgroup: rename ->create/post_create/pre_destroy/destroy() to ->css_alloc/online/offline/free()

2012-11-19T16:13:38+00:00

Rename cgroup_subsys css lifetime related callbacks to better describe
what their roles are.  Also, update documentation.

Signed-off-by: Tejun Heo 
Acked-by: Li Zefan

cgroup: allow ->post_create() to fail

2012-11-19T16:13:38+00:00

There could be cases where controllers want to do initialization
operations which may fail from ->post_create().  This patch makes
->post_create() return -errno to indicate failure and online_css()
relay such failures.

Signed-off-by: Tejun Heo 
Acked-by: Li Zefan 
Cc: Glauber Costa

cgroup: introduce CSS_ONLINE flag and on/offline_css() helpers

2012-11-19T16:13:37+00:00

New helpers on/offline_css() respectively wrap ->post_create() and
->pre_destroy() invocations.  online_css() sets CSS_ONLINE after
->post_create() is complete and offline_css() invokes ->pre_destroy()
iff CSS_ONLINE is set and clears it while also handling the temporary
dropping of cgroup_mutex.

This patch doesn't introduce any behavior change at the moment but
will be used to improve cgroup_create() failure path and allow
->post_create() to fail.

Signed-off-by: Tejun Heo 
Acked-by: Li Zefan