linux-kernel - Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator framework

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Message-ID: <AANLkTimatyb6cONqH319-xYmXTBb_jQuTLCmU_M6jYPa@mail.gmail.com>
Date:	Thu, 26 Aug 2010 13:14:07 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Michał Nazarewicz <m.nazarewicz@...sung.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Hans Verkuil <hverkuil@...all.nl>,
	Daniel Walker <dwalker@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Jonathan Corbet <corbet@....net>,
	Peter Zijlstra <peterz@...radead.org>,
	Pawel Osciak <p.osciak@...sung.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	linux-kernel@...r.kernel.org,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	linux-mm@...ck.org, Kyungmin Park <kyungmin.park@...sung.com>,
	Zach Pfeffer <zpfeffer@...eaurora.org>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Mel Gorman <mel@....ul.ie>, linux-media@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH/RFCv4 0/6] The Contiguous Memory Allocator framework

On Thu, Aug 26, 2010 at 1:06 PM, Minchan Kim <minchan.kim@...il.com> wrote:
> On Thu, Aug 26, 2010 at 12:44 PM, KAMEZAWA Hiroyuki
> <kamezawa.hiroyu@...fujitsu.com> wrote:
>> On Thu, 26 Aug 2010 11:50:17 +0900
>> KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:
>>
>>> 128MB...too big ? But it's depend on config.
>>>
>>> IBM's ppc guys used 16MB section, and recently, a new interface to shrink
>>> the number of /sys files are added, maybe usable.
>>>
>>> Something good with this approach will be you can create "cma" memory
>>> before installing driver.
>>>
>>> But yes, complicated and need some works.
>>>
>> Ah, I need to clarify what I want to say.
>>
>> With compaction, it's helpful, but you can't get contiguous memory larger
>> than MAX_ORDER, I think. To get memory larger than MAX_ORDER on demand,
>> memory hot-plug code has almost all necessary things.
>
> True. Doesn't patch's idea of Christoph helps this ?
> http://lwn.net/Articles/200699/

Of course, It itself can't meet our requirement but idea of range
allocation seem to be good.
I think it can be start point.

>
> --
> Kind regards,
> Minchan Kim
>



-- 
Kind regards,
Minchan Kim
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