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Re: [Xen-devel] IVTV and Xen

It looks like swiotlb=16,force works, but just swiotlb=force causes my domu to 

The place where you made your stand never mattered,
only that you were there... and still on your feet

On Mon, 1 May 2006, Keir Fraser wrote:

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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