RE: [Xen-devel] Re: [Patch] Constrain DMADOM/swiotlb allocations to1G phys to fix b44 NIC driver

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> On Tue, Nov 28, 2006 at 04:31:33PM +0000, Alan wrote:
> > > > constraint for the DMADOM heap; and changes the x86/x86_64
swiotlb to
> > > > request a 30-bit constraint for allocations of the swiotlb
memory.
> >
> > (The hardware pseudo-iommu on the AMD can't handle this either as it
> > can only appear in the PCI window)
> 
> Assuming you mean GART, Xen doesn't support it at the moment (more
> accurately, dom0 cannot run with GART enabled on Xen). There were
> patches for this from AMD, but they weren't merged AFAICR.

It would be good to see those patches floated on the list again, along
with some benchmarks to show that they beat bounce buffers.

Thanks,
Ian

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