linux-kernel - Re: [PATCH v2 2/3] sched: factor out code to should_we

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Date:	Fri, 2 Aug 2013 12:32:47 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Preeti U Murthy <preeti@...ux.vnet.ibm.com>
Cc:	김준수 <iamjoonsoo.kim@....com>,
	'Ingo Molnar' <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	'Mike Galbraith' <efault@....de>,
	'Paul Turner' <pjt@...gle.com>,
	'Alex Shi' <alex.shi@...el.com>,
	'Vincent Guittot' <vincent.guittot@...aro.org>,
	'Morten Rasmussen' <morten.rasmussen@....com>,
	'Namhyung Kim' <namhyung@...nel.org>,
	'Joonsoo Kim' <js1304@...il.com>
Subject: Re: [PATCH v2 2/3] sched: factor out code to should_we_balance()

On Fri, Aug 02, 2013 at 02:56:14PM +0530, Preeti U Murthy wrote:
> >> You need to iterate over all the groups of the sched domain env->sd and
> >> not just the first group of env->sd like you are doing above. This is to
> > 
> > I don't think so.
> > IIRC, env->sd->groups always means local group,
> > so we don't need to find our group by iterating over all the groups.
> 
> Take a look at update_sd_lb_stats(). That should clarify this. There is
> an exclusive
> local_group check there.
> 
> sd->groups points to the first group in the list of groups under this sd.

Take a look at: 88b8dac0a
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