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

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Date:	Mon, 23 Sep 2013 11:53:31 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Tang Chen <tangchen@...fujitsu.com>
Cc:	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.

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.

Thanks.

-- 
tejun
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