linux-kernel - Re: [RFC PATCH] sched: select_idle

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Message-ID: <52D8C25B.6080409@linaro.org>
Date:	Fri, 17 Jan 2014 13:40:43 +0800
From:	Alex Shi <alex.shi@...aro.org>
To:	Mike Galbraith <efault@....de>
CC:	mingo@...hat.com, peterz@...radead.org, morten.rasmussen@....com,
	vincent.guittot@...aro.org, daniel.lezcano@...aro.org,
	wangyun@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] sched: select_idle_sibling macro optimize

On 01/17/2014 11:36 AM, Mike Galbraith wrote:
>>>>> +
>>>>> > >>> +		/* skip single group domain */
>>>>> > >>> +		if (sg == sg->next)
>>>>> > >>> +			continue;
>>> > > 
>>> > > When is that gonna happen?
>> > 
>> > I had seen this in a Intel platform, you may have both CPU domain and MC
>> > domain layer, because the domain flag is different, then they can not be
>> > merged. and then the CPU domain just has one group.
> But sd starts at MC.

That's true. Sorry for noise.

-- 
Thanks
    Alex
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