linux-kernel - Re: [PATCH v3 12/13] x86, numa, acpi, memory-hotplug: Make movablecore=acpi have higher priority.

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Date:	Mon, 03 Jun 2013 15:37:06 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	Wanpeng Li <liwanp@...ux.vnet.ibm.com>
CC:	mingo@...hat.com, hpa@...or.com, akpm@...ux-foundation.org,
	yinghai@...nel.org, jiang.liu@...wei.com, wency@...fujitsu.com,
	laijs@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
	tj@...nel.org, mgorman@...e.de, minchan@...nel.org,
	mina86@...a86.com, gong.chen@...ux.intel.com,
	vasilis.liaskovitis@...fitbricks.com, lwoodman@...hat.com,
	riel@...hat.com, jweiner@...hat.com, prarit@...hat.com,
	x86@...nel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v3 12/13] x86, numa, acpi, memory-hotplug: Make movablecore=acpi
 have higher priority.

On 06/03/2013 10:59 AM, Wanpeng Li wrote:
> On Fri, May 24, 2013 at 05:29:21PM +0800, Tang Chen wrote:
>> Arrange hotpluggable memory as ZONE_MOVABLE will cause NUMA performance decreased
>> because the kernel cannot use movable memory.
>>
>> For users who don't use memory hotplug and who don't want to lose their NUMA
>> performance, they need a way to disable this functionality.
>>
>> So, if users specify "movablecore=acpi" in kernel commandline, the kernel will
>> use SRAT to arrange ZONE_MOVABLE, and it has higher priority then original
>> movablecore and kernelcore boot option.
>>
>> For those who don't want this, just specify nothing.
>>
>
> Reviewed-by: Wanpeng Li<liwanp@...ux.vnet.ibm.com>

Thank you very much for reviewing these patches. :)

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