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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: Wed, 13 Jul 2005 15:51:10 -0400
  • Cc: xen-devel List <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Wed, 13 Jul 2005 19:50:41 +0000
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On 7/11/05, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:
> One last thing you might want to try is to edit
> linux-2.6.11/arch/xen/i386/kernel/pci-dma.c. There you will see that
> there are four separate uses of memcpy(), each conditional on a test of
> the form 'if (direction != DMA_xxx)'. You *might* have more success if
> you remove the direction-conditional tests and always memcpy.
> Apart from that, this needs someone with hardware and expertise, and
> who cares about both ivtv and xen, to wade in. :-)

Well, life got in the way and I didn't try this fix until just now..
But it works! I'm going to get my mythtv setup moved into the domU so
I can test it completely, but it seems to work perfectly.

Thank you very, very much. Is removing the conditionals a permanent
solution that can be commited, or is there anything else you'd like me
to test?


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

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