linux-kernel - Re: [RFCv5 PATCH 27/46] sched, cpuidle: Track cpuidle state index in the scheduler

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Message-ID: <20150721151618.GC15088@e105550-lin.cambridge.arm.com>
Date:	Tue, 21 Jul 2015 16:16:19 +0100
From:	Morten Rasmussen <morten.rasmussen@....com>
To:	Leo Yan <leo.yan@...aro.org>
Cc:	peterz@...radead.org, mingo@...hat.com, vincent.guittot@...aro.org,
	daniel.lezcano@...aro.org,
	Dietmar Eggemann <Dietmar.Eggemann@....com>,
	yuyang.du@...el.com, mturquette@...libre.com, rjw@...ysocki.net,
	Juri Lelli <Juri.Lelli@....com>, sgurrappadi@...dia.com,
	pang.xunlei@....com.cn, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org
Subject: Re: [RFCv5 PATCH 27/46] sched, cpuidle: Track cpuidle state index in
 the scheduler

Hi Leo Yan,

On Tue, Jul 21, 2015 at 02:41:10PM +0800, Leo Yan wrote:
> Hi Morten,
> 
> On Tue, Jul 07, 2015 at 07:24:10PM +0100, Morten Rasmussen wrote:
> > The idle-state of each cpu is currently pointed to by rq->idle_state but
> > there isn't any information in the struct cpuidle_state that can used to
> > look up the idle-state energy model data stored in struct
> > sched_group_energy. For this purpose is necessary to store the idle
> > state index as well. Ideally, the idle-state data should be unified.
> > 
> > cc: Ingo Molnar <mingo@...hat.com>
> > cc: Peter Zijlstra <peterz@...radead.org>
> > 
> > Signed-off-by: Morten Rasmussen <morten.rasmussen@....com>
> 
> This patch should re-base with latest kernel; otherwise it will have
> conflict with below commits:
> 
> 827a5ae sched / idle: Call default_idle_call() from cpuidle_enter_state()
> faad384 sched / idle: Call idle_set_state() from cpuidle_enter_state()
> bcf6ad8 sched / idle: Eliminate the "reflect" check from cpuidle_idle_call()
> 82f6632 sched / idle: Move the default idle call code to a separate function

I will make sure to rebase the patches and hopefully make an updated
branch available for those who want test the patches.

Thanks,
Morten
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