linux-kernel - Re: [RFC PATCH 2/3] sched/deadline: Hierarchical scheduling with DL on top of RT

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Date:   Fri, 31 Mar 2017 19:51:19 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Alessio Balsini <a.balsini@...up.it>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Tommaso Cucinotta <tommaso.cucinotta@...up.it>,
        Juri Lelli <juri.lelli@....com>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Andrea Parri <parri.andrea@...il.com>,
        Luca Abeni <luca.abeni@...tannapisa.it>,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 2/3] sched/deadline: Hierarchical scheduling with DL
 on top of RT

On Fri, Mar 31, 2017 at 07:44:36PM +0200, Alessio Balsini wrote:
> The runtime of RT tasks controlled by CGroups are enforced by the
> SCHED_DEADLINE scheduling class, based on the runtime and period (the
> deadline is set equal to the period) parameters.
> 
> sched_dl_entity may also represent a group of RT tasks, providing a rt_rq.

Such a short changelog for such a big patch..

What does it do with RT affinities and AC ?

Does it do the minimal concurrency thing; or something else? All things
that should be explained and are not.