linux-kernel - Re: [RFC PATCH 14/14] sched: implement usage tracking

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Message-ID: <CAPM31RLKvmRr_76B12zTnqh6+htm++hmSiM9O3EsuRd47oFtpw@mail.gmail.com>
Date:	Fri, 17 Feb 2012 02:54:55 -0800
From:	Paul Turner <pjt@...gle.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	linux-kernel@...r.kernel.org, Venki Pallipadi <venki@...gle.com>,
	Srivatsa Vaddagiri <vatsa@...ibm.com>,
	Mike Galbraith <efault@....de>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	Ben Segall <bsegall@...gle.com>, Ingo Molnar <mingo@...e.hu>,
	Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>
Subject: Re: [RFC PATCH 14/14] sched: implement usage tracking

On Thu, Feb 16, 2012 at 5:37 AM, Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
> On Wed, 2012-02-01 at 17:38 -0800, Paul Turner wrote:
>>  static inline void update_rq_runnable_avg(struct rq *rq, int runnable)
>>  {
>> -       __update_entity_runnable_avg(rq->clock_task, &rq->avg, runnable);
>> +       __update_entity_runnable_avg(rq->clock_task, &rq->avg, runnable,
>> +                                    runnable);
>
> Its not immediately obvious why we use @runnable for @running,

Isn't it?  An rq is the root of all scheduling -- if there are any
runnable tasks than one of them better be running when this is called.

I can add a comment to this effect.
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