linux-kernel - Re: [RFC 3/3] mm: iommu: The Virtual Contiguous Memory Manager

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Message-ID: <20100710145639.GC10080@8bytes.org>
Date:	Sat, 10 Jul 2010 16:56:39 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	Zach Pfeffer <zpfeffer@...eaurora.org>
Cc:	Daniel Walker <dwalker@...eaurora.org>,
	Andi Kleen <andi@...stfloor.org>,
	Randy Dunlap <randy.dunlap@...cle.com>, mel@....ul.ie,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC 3/3] mm: iommu: The Virtual Contiguous Memory Manager

On Fri, Jul 02, 2010 at 12:33:51AM -0700, Zach Pfeffer wrote:
> Daniel Walker wrote:

> > So if we include this code which "map implementations" could you
> > collapse into this implementations ? Generally , what currently existing
> > code can VCMM help to eliminate?
> 
> In theory, it can eliminate all code the interoperates between IOMMU,
> CPU and non-IOMMU based devices and all the mapping code, alignment,
> mapping attribute and special block size support that's been
> implemented.

Thats a very abstract statement. Can you point to particular code files
and give a rough sketch how it could be improved using VCMM?

	Joerg

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