Re: [PATCH 01/34] AMD IOMMU: add Kconfig entry

[Andi Kleen]

Joerg Roedel <joro@xxxxxxxxxx> 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
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