linux-kernel - Re: sched: CPU #1's llc-sibling CPU #0 is not on the same node!

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Date:	Fri, 1 Mar 2013 15:02:39 +0900
From:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Tang Chen <tangchen@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Don Morris <don.morris@...com>,
	Tim Gardner <tim.gardner@...onical.com>,
	Tejun Heo <tj@...nel.org>, Tony Luck <tony.luck@...el.com>,
	Thomas Renninger <trenn@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jarkko Sakkinen <jarkko.sakkinen@...el.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Wen Congyang <wency@...fujitsu.com>,
	Lin Feng <linfeng@...fujitsu.com>,
	"guz.fnst@...fujitsu.com" <guz.fnst@...fujitsu.com>,
	Gui jianfeng <guijianfeng@...fujitsu.com>
Subject: Re: sched: CPU #1's llc-sibling CPU #0 is not on the same node!

2013/03/01 14:00, Yinghai Lu wrote:
> On Thursday, February 28, 2013, H. Peter Anvin wrote:
>
>> On 02/28/2013 08:32 PM, Linus Torvalds wrote:
>>> Yingai, Andrew,
>>>   is this ok with you two?
>>>
>>>          Linus
>>
>> FWIW, it makes sense to me iff it resolves the problems
>
>
> I prefer to reverting all 8 patches.
>
> Actually I have worked out one patch that could solve all problems, but it
> is too intrusive that I do      not want to split it to small pieces to
> post it.
>

> Leaving the movablemem_map related changes in  the upstream tree,
> will prevent me from continuing to make memblock to be used to allocate
> page table on local node ram for hot add.

Original issue occurs by two patches. And it is fixed by Tang's reverting
patch. So other patches are obviously unrelated to original problem. Thus
there is no reason to revert all patches related with movablemem_map.

If there is a reason, movablemem_map patches prevent only your work.

If you keep on developing your work, you should develop it in consideration
of those patches.

Thanks,
Yasuaki Ishimatsu

>
> Will send reverting patch and putting page table on local node patch around
> 10pm after I get home.
>
> Thanks
>


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