linux-kernel - Re: [PATCH v3 4/5] x86, mem-hotplug: Support initialize page tables from low to high.

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Message-ID: <52407058.8070806@gmail.com>
Date:	Tue, 24 Sep 2013 00:46:16 +0800
From:	Zhang Yanfei <zhangyanfei.yes@...il.com>
To:	Tejun Heo <tj@...nel.org>
CC:	Tang Chen <tangchen@...fujitsu.com>, rjw@...k.pl, lenb@...nel.org,
	tglx@...utronix.de, mingo@...e.hu, hpa@...or.com,
	akpm@...ux-foundation.org, toshi.kani@...com,
	zhangyanfei@...fujitsu.com, liwanp@...ux.vnet.ibm.com,
	trenn@...e.de, yinghai@...nel.org, jiang.liu@...wei.com,
	wency@...fujitsu.com, laijs@...fujitsu.com,
	isimatu.yasuaki@...fujitsu.com, izumi.taku@...fujitsu.com,
	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,
	linux-acpi@...r.kernel.org
Subject: Re: [PATCH v3 4/5] x86, mem-hotplug: Support initialize page tables
 from low to high.

Hello tejun,

On 09/23/2013 11:53 PM, Tejun Heo wrote:
> Hey,
> 
> On Fri, Sep 13, 2013 at 05:30:54PM +0800, Tang Chen wrote:
>> init_mem_mapping() is called before SRAT is parsed. And memblock will allocate
>> memory for page tables. To prevent page tables being allocated within hotpluggable
>> memory, we will allocate page tables from the end of kernel image to the higher
>> memory.
> 
> The same comment about patch split as before.  Please make splitting
> out memory_map_from_high() a separate patch.  Also, please choose one
> pair to describe the direction.  The series is currently using four
> variants - top_down/bottom_up, high_to_low/low_to_high,
> from_high/from_low. rev/[none].  Please choose one and stick with it.

OK. will do the split and choose one pair. Thanks for the reminding again.

> 
> Thanks.
> 


-- 
Thanks.
Zhang Yanfei
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