Date: Fri, 27 Jun 2008 19:05:46 +0200
From: Joerg Roedel <joro@8bytes.org>
To: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>, Adrian Bunk <bunk@kernel.org>,
       Joerg Roedel <joerg.roedel@amd.com>, tglx@linutronix.de,
       mingo@redhat.com, linux-kernel@vger.kernel.org,
       iommu@lists.linux-foundation.org, bhavna.sarathy@amd.com,
       Sebastian.Biemueller@amd.com, robert.richter@amd.com
Subject: Re: [PATCH 01/34] AMD IOMMU: add Kconfig entry
Message-ID: <20080627170546.GE10197@8bytes.org>
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On Fri, Jun 27, 2008 at 12:59:47PM -0400, Muli Ben-Yehuda wrote:
> On Fri, Jun 27, 2008 at 06:54:30PM +0200, Joerg Roedel wrote:
> 
> > True. At least for the case without device isolation I have some
> > optimizations in mind which will minimize the performance
> > tradeoff. I hope to have them ready for 2.6.28 :)
> 
> Do you mean the case where you have a single I/O address space which
> is shared by all devices?

Yes. I think this will be the case used most when IOMMU is used for
virtualization and to handle devices with limited DMA address ranges. In
this case there is a lot to optimize.

Joerg

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