On Thu, Sep 15, 2016 at 01:08:07PM -0700, Andy Lutomirski wrote:

BTW, Mike keeps mentioning exclusive cgroups as problematic with the
no-internal-tasks constraints.  Do exclusive cgroups still exist in
cgroup2?  Could we perhaps just remove that capability entirely?  I've
never understood what problem exlusive cpusets and such solve that
can't be more comprehensibly solved by just assigning the cpusets the
normal inclusive way.

Without exclusive sets we cannot split the sched_domain structure.
Which leads to not being able to actually partition things. That would
break DL for one.