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[Xen-devel] Re: [ivtv-devel] Problems loading ivtv in Xen - DMA issues?

  • To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
  • From: David Muench <davemuench@xxxxxxxxx>
  • Date: Thu, 7 Jul 2005 13:34:06 -0400
  • Cc: ivtv-devel@xxxxxxxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Thu, 07 Jul 2005 17:32:52 +0000
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On 7/7/05, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:
> On 7 Jul 2005, at 17:07, David Muench wrote:
> > I recieved this reply to my request for help with ivtv on Xen on the
> > ivtv-devel list. I don't feel very well qualified to respond to
> > Andrew. Can I ask what your thoughts are? Am I just out of luck?
> Andrew's simply pointing out that the ivtv driver already uses the
> dma-mapping interface properly. It's good to have that confirmed. :-)
> However, looking back at XenLinux's implementation of
> {dma,pci}_map_single, it is broken for multi-page buffers. It's
> surprising noone has hit a problem before now, but most devices other
> than video-capture cards you deal with only up to a page at a time.
> So this is a Xen bug: I'll find some time to fix this and get back to
> you. Are you using Xen 2.0 or 3.0 (unstable)?

That's great news, I thought I was up a creek. I'm using 2.0.6. Thanks
again, I really appreciate your help.


David Muench - davemuench@xxxxxxxxx
Jabber ID: dave@xxxxxxxxxxxxxxxxxxxx

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