On Sat, Jul 06, 2019 at 06:16:55PM -0700, Paul E. McKenney wrote:

4.	SCHED_DEADLINE treats the other three scheduling classes as each
	having a period, deadline, and a modest CPU consumption budget
	for the members of the class in aggregate.  But this has to have
	been discussed before.  How did that go?

Yeah; this has been proposed a number of times; and I think everybody
agrees that it is a good idea, but nobody has so far sat down and wrote
the patches.

Or rather; we would've gotten this for 'free' with the rt-cgroup
rewrite, but that's been stuck forever due to affinity being difficult.