linux-kernel - Re: [PATCH 13/15] sched: add bandwidth management for sched

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Date:	Fri, 25 May 2012 12:38:12 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Juri Lelli <juri.lelli@...il.com>
Cc:	tglx@...utronix.de, mingo@...hat.com, rostedt@...dmis.org,
	oleg@...hat.com, fweisbec@...il.com, darren@...art.com,
	johan.eker@...csson.com, p.faure@...tech.ch,
	linux-kernel@...r.kernel.org, claudio@...dence.eu.com,
	michael@...rulasolutions.com, fchecconi@...il.com,
	tommaso.cucinotta@...up.it, nicola.manica@...i.unitn.it,
	luca.abeni@...tn.it, dhaval.giani@...il.com, hgu1972@...il.com,
	paulmck@...ux.vnet.ibm.com, raistlin@...ux.it,
	insop.song@...csson.com, liming.wang@...driver.com,
	jkacur@...hat.com, harald.gustafsson@...csson.com
Subject: Re: [PATCH 13/15] sched: add bandwidth management for sched_dl.

On Wed, 2012-05-23 at 23:42 +0200, Juri Lelli wrote:
> +/*
> + * Coupling of -dl and -rt bandwidth.
> + *
> + * Here we check, while setting the system wide bandwidth available
> + * for -dl tasks and groups, if the new values are consistent with
> + * the system settings for the bandwidth available to -rt entities.
> + *
> + * IOW, we want to enforce that
> + *
> + *   rt_bandwidth + dl_bandwidth <= 100%
> + *
> + * is always true.
> + */ 

I was thinking we could do it the other way around, have have
dl_bandwidth included in rt_bandwidth.



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