[PATCH v4 cgroup/for-3.7] cgroup: mark subsystems with broken hierarchy support and whine if cgroups are nested for them

[Tejun Heo]

Hello, Glauber.

On Fri, Sep 14, 2012 at 01:17:14PM +0400, Glauber Costa wrote:
> > I side with Vivek, and I think we should warn first level. It just tends
> > to be wrong. If memcg is a special case, just special case it.
> > _but_, I see no reason not to do it.

The issue at hand is how to handle tasks vs. sub-cgroups in the same
cgroup.  memcg doesn't factor into this because it doesn't implement
proportional control.  No matter which way we decide, it doesn't
matter for memcg.

Thanks.

-- 
tejun