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Re: [Xen-devel] VP problematic for backend drivers on IA64?

On Wed, Jan 25, 2006 at 04:56:43PM +0000, Keir Fraser wrote:
> On 25 Jan 2006, at 16:46, Muli Ben-Yehuda wrote:
> >That's a good point. Since Xen provides its own "IOMMU" (swiotlb at
> >the moment), I think we should set PCI_DMA_BUS_IS_PHYS so that the
> >block layer never does bounce buffers on its own - unless doing it
> >there is more efficient?
> We set it to zero if using swiotlb. I think setting it to zero disables 
> driver-specific bounce buffer code?

Yes it does. I thought we weren't doing it for some reason, sorry
about the false alarm.

Muli Ben-Yehuda
http://www.mulix.org | http://mulix.livejournal.com/

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