linux-kernel - Re: [PATCH 8/9] dspbridge: add map support for big buffers

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Message-Id: <20100826155416J.fujita.tomonori@lab.ntt.co.jp>
Date:	Thu, 26 Aug 2010 15:55:02 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	x0095840@...com
Cc:	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
	ohad@...ery.com, hiroshi.doyu@...ia.com, ameya.palande@...ia.com,
	felipe.contreras@...ia.com
Subject: Re: [PATCH 8/9] dspbridge: add map support for big buffers

On Wed, 30 Jun 2010 19:20:59 -0500
Fernando Guzman Lugo <x0095840@...com> wrote:

> due to a restriction in scatter gather lists, it can
> not be created a list for a buffer bigger than 1MB.
> This patch is spliting big mappings into 1MB mappings.

I don't read the whole thread but the above description is incorrect.

Why can't you use scatter gather chaining? You can create a scatter
list for a buffer larger than 1MB.
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