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Date: Fri, 27 Jun 2008 20:54:59 +0200 From: Andi Kleen <andi@...stfloor.org> To: Joerg Roedel <joro@...tes.org> Cc: Muli Ben-Yehuda <muli@...ibm.com>, Adrian Bunk <bunk@...nel.org>, Joerg Roedel <joerg.roedel@....com>, tglx@...utronix.de, mingo@...hat.com, linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org, bhavna.sarathy@....com, Sebastian.Biemueller@....com, robert.richter@....com Subject: Re: [PATCH 01/34] AMD IOMMU: add Kconfig entry Joerg Roedel <joro@...tes.org> writes: > On Fri, Jun 27, 2008 at 12:39:45PM -0400, Muli Ben-Yehuda wrote: >> On Fri, Jun 27, 2008 at 04:47:29PM +0200, Andi Kleen wrote: >> >> > Also it should ideally describe that there is a trade off between >> > reliability and performance with IOMMU enabled. >> >> I agree that there's a performance tradeoff with current generation >> hardware and ingerfaces, but it wouldn't be fair to single out a >> single IOMMU implementation ;=) > > 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 :) Not sure that would be very useful. Outside of virtualization device isolation is the main feature of an IOMMU on a native kernel. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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