linux-kernel - Re: [PATCH v2 5/5] page_alloc: Bootmem limit with movablecore

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Date:	Tue, 27 Nov 2012 09:12:53 +0800
From:	Jiang Liu <jiang.liu@...wei.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Tang Chen <tangchen@...fujitsu.com>,
	wujianguo <wujianguo106@...il.com>, <akpm@...ux-foundation.org>,
	<rob@...dley.net>, <isimatu.yasuaki@...fujitsu.com>,
	<laijs@...fujitsu.com>, <wency@...fujitsu.com>,
	<linfeng@...fujitsu.com>, <yinghai@...nel.org>,
	<kosaki.motohiro@...fujitsu.com>, <minchan.kim@...il.com>,
	<mgorman@...e.de>, <rientjes@...gle.com>, <rusty@...tcorp.com.au>,
	<linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
	<linux-doc@...r.kernel.org>, <wujianguo@...wei.com>,
	<qiuxishi@...wei.com>
Subject: Re: [PATCH v2 5/5] page_alloc: Bootmem limit with movablecore_map

On 2012-11-26 23:48, H. Peter Anvin wrote:
> On 11/26/2012 05:15 AM, Tang Chen wrote:
>>
>> Hi Wu,
>>
>> That is really a problem. And, before numa memory got initialized,
>> memblock subsystem would be used to allocate memory. I didn't find any
>> approach that could fully address it when I making the patches. There
>> always be risk that memblock allocates memory on ZONE_MOVABLE. I think
>> we can only do our best to prevent it from happening.
>>
>> Your patch is very helpful. And after a shot look at the code, it seems
>> that acpi_numa_memory_affinity_init() is an architecture dependent
>> function. Could we do this somewhere which is not depending on the
>> architecture ?
>>
> 
> The movable memory should be classified as a non-RAM type in memblock,
> that way we will not allocate from it early on.
Hi Peter,

I have tried to reserved movable memory from bootmem allocator, but the
ACPICA subsystem is initialized later than setting up movable zone.
So still trying to figure out a way to setup/reserve movable zones
according to information from static ACPI tables such as SRAT/MPST etc.

Regards!
Gerry

> 
> 	-hpa
> 
> 
> .
> 


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