Re: [PATCH] quiet down swiotlb warnings

Muli Ben-Yehuda
2007-06-02T15:21:55Z

On Fri, Jun 01, 2007 at 10:26:01PM +0200, Andi Kleen wrote:

> Normally swiotlb doesn't even try to bounce when dma mask is <=
> end_pfn so something must be very wrong in your kernel. It
> definitely isn't a mainline kernel. If this happens in Xen then Xen
> just needs fixing -- it should not try to bounce when the normal
> kernel wouldn't.

Xen needs to bounce when the requested buffer is not contiguous in
machine memory (and indeed uses swiotlb for that).

Cheers,
Muli