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

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Message-ID: <5130484D.1020701@cn.fujitsu.com>
Date:	Fri, 01 Mar 2013 14:18:53 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...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!

On 03/01/2013 01:00 PM, 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.

Hi Yinghai,

Would you please give me a url to your code ?

I don't think movablemem_map will block your work a lot. According to your
description, you are modifying memblock to reserve some memory for local
node pagetables, right ?

If so, I think it won't be too difficult to make the code OK with your work.

Thanks. :)

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