linux-kernel - Re: [PATCH v5 1/7] Revert "sched: Introduce temporary FAIR_GROUP

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Date:	Mon, 6 May 2013 01:55:31 -0700
From:	Paul Turner <pjt@...gle.com>
To:	Alex Shi <alex.shi@...el.com>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Borislav Petkov <bp@...en8.de>,
	Namhyung Kim <namhyung@...nel.org>,
	Mike Galbraith <efault@....de>,
	Morten Rasmussen <morten.rasmussen@....com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	Michael Wang <wangyun@...ux.vnet.ibm.com>
Subject: Re: [PATCH v5 1/7] Revert "sched: Introduce temporary
 FAIR_GROUP_SCHED dependency for load-tracking"

On Mon, May 6, 2013 at 1:49 AM, Alex Shi <alex.shi@...el.com> wrote:
> On 05/06/2013 04:24 PM, Paul Turner wrote:
>>> >         /*
>>> >          * CFS Load tracking
>>> >          * Under CFS, load is tracked on a per-entity basis and aggregated up.
>>> > @@ -242,8 +236,7 @@ struct cfs_rq {
>>> >         u64 runnable_load_avg, blocked_load_avg;
>>> >         atomic64_t decay_counter, removed_load;
>>> >         u64 last_decay;
>>> > -#endif /* CONFIG_FAIR_GROUP_SCHED */
>>> > -/* These always depend on CONFIG_FAIR_GROUP_SCHED */
>> We should perhaps replace this with a comment that these are only
>> needed to aggregate the point-wise representation in the
>> FAIR_GROUP_SCHED case.
>>
>
> Is the comments ok? :)
>
> /* runnable related variables only used in FAIR_GROUP_SCHED */

Perhaps:

 -/* These always depend on CONFIG_FAIR_GROUP_SCHED */
#ifdef ...
+/* Required to track per-cpu representation of a task_group */


>
> --
> Thanks
>     Alex
--
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