linux-kernel - Re: [RFC PATCH 0/2] sched: simplify the select_task_rq

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Date:	Fri, 25 Jan 2013 10:14:19 +0800
From:	Michael Wang <wangyun@...ux.vnet.ibm.com>
To:	Mike Galbraith <bitbucket@...ine.de>
CC:	linux-kernel@...r.kernel.org, mingo@...hat.com,
	peterz@...radead.org, mingo@...nel.org, a.p.zijlstra@...llo.nl
Subject: Re: [RFC PATCH 0/2] sched: simplify the select_task_rq_fair()

On 01/24/2013 06:34 PM, Mike Galbraith wrote:
> On Thu, 2013-01-24 at 17:26 +0800, Michael Wang wrote: 
>> On 01/24/2013 05:07 PM, Mike Galbraith wrote:
>>> On Thu, 2013-01-24 at 16:14 +0800, Michael Wang wrote:
>>>
>>>> Now it's time to work on v3 I think, let's see what we could get this time.
>>>
>>> Maybe v3 can try to not waste so much ram on affine map?
>>
>> Yeah, that has been a question in my mind at very beginning, but how...
> 
> Allocate at domain build time the max we can acquire via hotplug?
>>> Even better would be if it could just go away, along with relic of the
>>> bad old days wake_affine(), and we make the balance path so damn light
>>> but clever that select_idle_sibling() can go away too... and a pony ;-)
>>
>> Hmm...may be, I need some consideration here, a totally balance path,
>> interesting...
> 
> Unification is the right target, hitting it might not be so easy though.
> 
>> But I think we still need the clean code which sbm bring to us, do we?
> 
> Sure, if it makes things perform better.

Ok, let me think about these, big changes may not show in v3, but I will
keep those in mind.

Regards,
Michael Wang

> 
> -Mike
> 
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