linux-kernel - Re: [PATCH v6 00/15] memory-hotplug: hot-remove physical memory

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Date:	Thu, 10 Jan 2013 10:18:40 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	rientjes@...gle.com, len.brown@...el.com, benh@...nel.crashing.org,
	paulus@...ba.org, cl@...ux.com, minchan.kim@...il.com,
	kosaki.motohiro@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
	wujianguo@...wei.com, wency@...fujitsu.com, hpa@...or.com,
	linfeng@...fujitsu.com, laijs@...fujitsu.com, mgorman@...e.de,
	yinghai@...nel.org, glommer@...allels.com, x86@...nel.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, linux-acpi@...r.kernel.org,
	linux-s390@...r.kernel.org, linux-sh@...r.kernel.org,
	linux-ia64@...r.kernel.org, cmetcalf@...era.com,
	sparclinux@...r.kernel.org
Subject: Re: [PATCH v6 00/15] memory-hotplug: hot-remove physical memory

Hi Andrew,

On 01/10/2013 07:33 AM, Andrew Morton wrote:
> On Wed, 9 Jan 2013 17:32:24 +0800
> Tang Chen<tangchen@...fujitsu.com>  wrote:
>
>> This patch-set aims to implement physical memory hot-removing.
>
> As you were on th patch delivery path, all of these patches should have
> your Signed-off-by:.  But some were missing it.  I fixed this in my
> copy of the patches.

Thank you very much for the help. Next time I'll add it myself.

>
>
> I suspect this patchset adds a significant amount of code which will
> not be used if CONFIG_MEMORY_HOTPLUG=n.  "[PATCH v6 06/15]
> memory-hotplug: implement register_page_bootmem_info_section of
> sparse-vmemmap", for example.  This is not a good thing, so please go
> through the patchset (in fact, go through all the memhotplug code) and
> let's see if we can reduce the bloat for CONFIG_MEMORY_HOTPLUG=n
> kernels.
>
> This needn't be done immediately - it would be OK by me if you were to
> defer this exercise until all the new memhotplug code is largely in
> place.  But please, let's do it.

OK, I'll do have a check on it when the page_cgroup problem is solved.

Thanks. :)

>
>
>

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