Re: [Xen-devel] IVTV and Xen

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 1 May 2006, at 06:20, Andy Clayton wrote:

> > Has anyone had any luck getting IVTV .61 working in xen (Im on 3.0 
> > unstable changeset  Fri Mar 31
> > 00:26:07 2006 +0100 9494:8a8361994904 because of some unrelated 
> > driver issues with another device).
> > I keep getting a DMA issue. If this is fixed in a later rev, I will 
> > upgrade but that will be a
> > pretty major undertaking on this particular machine, so I thought I 
> > would ask for others experience
> > first.   This is what I get when the module inserts, this ia DomU 
> > kernel BTW.
> It has been a while, but I think I had a similar error with ivtv that 
> could be fixed by passing "swiotlb=force" to the kernel (extra in the 
> configs).  This was with an unstable changeset in between 3.0.1 and 
> 3.0.2.
We've never enabled swiotlb by default for domUs, even when they're 
driver domains. So you will definitely need 'swiotlb=force'. You could 
try 'swiotlb=16,force' for a 16MB swiotlb (the default is 64MB which 
may burn an unnecessary amount of RAM).
 -- Keir


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