[PATCH 9/9] cgroup_freezer: implement proper hierarchy support

[Tejun Heo]

Hello, Michal.

On Wed, Nov 07, 2012 at 12:00:57PM +0100, Michal Hocko wrote:
> > +	 * Update all its descendants in pre-order traversal.  Each
> > +	 * descendant will try to inherit its parent's FREEZING state as
> > +	 * CGROUP_FREEZING_PARENT.
> > +	 */
> > +	rcu_read_lock();
> > +	cgroup_for_each_descendant_pre(pos, freezer->css.cgroup) {
> > +		struct freezer *pos_f = cgroup_freezer(pos);
> > +		struct freezer *parent = parent_freezer(freezer);
> 
> This doesn't seem right. Why are we interested in freezer->parent here
> at all? We should either care about freezer->state & CGROUP_FREEZING or
> parent = parent_freezer(pos_f), right?

Yeap, that should have been parent_freezer(pos_f).  Argh...

Thanks.

-- 
tejun