linux-kernel - Re: [RFC][PATCH 1/3] contigous big page allocator

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Message-Id: <20101015000416N.fujita.tomonori@lab.ntt.co.jp>
Date:	Fri, 15 Oct 2010 00:09:47 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	andi@...stfloor.org
Cc:	fujita.tomonori@....ntt.co.jp, kamezawa.hiroyu@...fujitsu.com,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	minchan.kim@...il.com
Subject: Re: [RFC][PATCH 1/3] contigous big page allocator

On Thu, 14 Oct 2010 14:55:19 +0200
Andi Kleen <andi@...stfloor.org> wrote:

> > I think that at least one mainline driver in arm uses such trick but I
> > can't recall the name. Better to ask on the arm mainling list. Also I
> > heard that the are some out-of-tree patches about this.
> 
> I'm sure there are out of tree patches for lots of things,
> but at least in terms of merging mainline functionality
> use cases merged in the mainline tree are required.

I think that we already have drivers that need such feature in
mainline. They keep out-of-tree patches that give continuous memory to
these drivers reliably.

Anyway, Felipe pointed out one user. I also think that
drivers/media/video/videobuf-dma-contig.c also was already mentioned,
needs such feature.
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