linux-kernel - Re: [PATCH 12/14] sched: make dl_bw a sub-quota of rt

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Message-ID: <20131014140618.GA26604@gmail.com>
Date:	Mon, 14 Oct 2013 16:06:18 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Juri Lelli <juri.lelli@...il.com>
Cc:	peterz@...radead.org, 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@...il.com, liming.wang@...driver.com, jkacur@...hat.com,
	harald.gustafsson@...csson.com, vincent.guittot@...aro.org,
	bruce.ashfield@...driver.com--no-chain-reply-to
Subject: Re: [PATCH 12/14] sched: make dl_bw a sub-quota of rt_bw


* Juri Lelli <juri.lelli@...il.com> wrote:

> +#ifdef CONFIG_SMP
> +		struct dl_bw *dl_b = &cpu_rq(i)->rd->dl_bw;
> +#else
> +		struct dl_bw *dl_b = &cpu_rq(i)->dl.dl_bw;
> +#endif

> +#ifdef CONFIG_SMP
> +		struct dl_bw *dl_b = &cpu_rq(i)->rd->dl_bw;
> +#else
> +		struct dl_bw *dl_b = &cpu_rq(i)->dl.dl_bw;
> +#endif

Btw., this kind of SMP/UP assymetry pattern really sucks. Why not make UP 
use the SMP data structure, even if it's degenerate?

Thanks,

	Ingo
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