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

[Joerg Roedel]

On Fri, Jun 27, 2008 at 01:44:15PM -0400, Muli Ben-Yehuda wrote:
> On Fri, Jun 27, 2008 at 07:40:35PM +0200, Joerg Roedel wrote:
> 
> > Yes. As I said, this is for the non-isolating case. For the
> > isolation case (which is needed for protection) it is harder to
> > optimize. But there I think about some sort of lazy IOMMU TLB
> > flushing. The flushing and 'wait for the flush to finish' is the
> > most expensive part in the mapping and unmapping code path. But this
> > needs some experiments.
> 
> Agreed. The paper I just posted to the iommu mailing list has some
> ideas and experimental data.

Cool. I wasn't aware if that paper. I will read it next week. Thanks for
the pointer to it.

Joerg

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