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Subject: Re: [RFC 9/12][PATCH] SCHED_DEADLINE: system wide bandwidth
 management
From: Raistlin <raistlin@linux.it>
To: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
       michael trimarchi <michael@evidence.eu.com>,
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On Mon, 2009-12-28 at 15:44 +0100, Peter Zijlstra wrote:
> > Default value is _zero_ bandwidth available, thus write some numbers in=
 those
> > files before trying to start some SCHED_DEADLINE task. Setting runtime =
> period
> > is allowed (i.e., more than 100% bandwidth available for -deadline task=
s),
> > since it makes more than sense in SMP systems.
>=20
> Right, so the current rt bandwidth controls go up to 100%, where 100% is
> root_domain wide. That is, the bandwidth usage scale is irrespective of
> the number of cpus.
>=20
Yep, I know. Mine controls were working a little bit different because
of the fact I have bandwidth control at the task group --not rq-- level.
Anyway...

> If that was the best choice could of course be argued, but since we have
> that, it would be strange to add another set of controls which do not
> conform.
>=20
... I again agree that consistency come first, and I'll move the
controls in the right place, and convert them to the conforming
behavior.

Thanks and regards,
Dario

--=20
<<This happens because I choose it to happen!>> (Raistlin Majere)
----------------------------------------------------------------------
Dario Faggioli, ReTiS Lab, Scuola Superiore Sant'Anna, Pisa  (Italy)

http://blog.linux.it/raistlin / raistlin@ekiga.net /
dario.faggioli@jabber.org

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