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

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Message-ID: <CAE9FiQU-zqFdSz-7yq5EgV1YCzyNH_BY36Ym3tdHVEHHY6cdNg@mail.gmail.com>
Date:	Thu, 11 Apr 2013 08:10:28 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Tang Chen <tangchen@...fujitsu.com>
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 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.


Thanks

Yinghai
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