linux-kernel - Re: [PATCH 0/2] mm: vmemmap: add vmemmap_verify check for hot-add node/memory case

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Message-ID: <51675FA1.9000203@cn.fujitsu.com>
Date:	Fri, 12 Apr 2013 09:13:05 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Lin Feng <linfeng@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Lameter <cl@...ux.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Catalin Marinas <catalin.marinas@....com>, will.deacon@....com,
	Arnd Bergmann <arnd@...db.de>, tony@...mide.com,
	Ben Hutchings <ben@...adent.org.uk>,
	linux-arm-kernel@...ts.infradead.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux MM <linux-mm@...ck.org>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	Jiang Liu <jiang.liu@...wei.com>
Subject: Re: [PATCH 0/2] mm: vmemmap: add vmemmap_verify check for hot-add
 node/memory case

On 04/11/2013 11:10 PM, Yinghai Lu wrote:
> On Thu, Apr 11, 2013 at 12:41 AM, Tang Chen<tangchen@...fujitsu.com>  wrote:
>>
>> 3. If we add flag to memblock, we can mark different memory. And I remember
>>     you mentioned before that we can use memblock to reserve local node data
>>     for node-life-cycle data, like vmemmap, pagetable.
>>
>>     So are you doing the similar work now ?
>
> No, i did not start it yet.
>
>>
>>     If not, I think I can merge it into mine, and push a new patch-set with
>>     hot-add, hot-remove code modified to support putting vmemmap, pagetable,
>>     pgdat, page_cgroup, ..., on local node.
>
> Need to have it separated with moving_zone.
>
> 1. rework memblock to keep alive all the way for hotplug usage.
> 2. put pagetable and vmemap on the local node range with help of memblock.
>

OK，thanks for the comments. I'll merge it into my work and post an RFC 
patch-set soon.

Thanks. :)
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