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

[Muli Ben-Yehuda <mulix@xxxxxxxxx>]

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.

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


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel