Re: [PATCH] sched: Relax a restriction in sched_rt_can_attach()

[Mike Galbraith <umgwanakikbuti@gmail.com>]

On Mon, 2015-05-04 at 12:39 +0800, Zefan Li wrote:

> >> We are moving toward unified hierarchy where all the cgroup controllers
> >> are bound together, so it would make cgroups easier to use if we have less
> >> restrictions on attaching tasks between cgroups.
> > 
> > Forcing group scheduling overhead on users if they want cpuset or memory
> > cgroup functionality would be far from wonderful.  Am I interpreting the
> > implications of this unification/binding properly?
> > 
> > (I hope not, surely the plan is not to utterly _destroy_ cgroup utility)
> > 
> 
> Some degree of flexibility is provided so that you may disable some controllers
> in a subtree. For example:
> 
> root                  ---> child1
> (cpuset,memory,cpu)        (cpuset,memory)
>                       \
>                        \-> child2
>                            (cpu)

Whew, that's a relief.  Thanks.

	-Mike