Re: [Xen-users] Anyone have success with ivtv in a pvm? I got DMA TIMEOUT messages on xen-next/4.0-rc9-pre...

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, Mar 30, 2010 at 12:36:48AM +0200, Mark Hurenkamp wrote:
> Hi,
> 
> 
> For some weeks now, i'm running a xen-4 based system, which i want to take 
> over the tasks of my previous xen-3.2 based server.
> One of the things i used to do with my 3.2 system, was running a mythtv server
> inside a pvm with ivtv based hardware. This seemed to work fine with xen 3.2.
> 
> Trying to get this to work with xen-4, i don't seem to have much success... 
> older versions of the kernel would lock-up (well that's what you get for 
> trying bleeding edge, i know), but now it seems to boot fine.
> However, as soon as i try to record something from /dev/video0 (e.g. using 
> cat 
> /dev/video0 > tmp0.mpg), i get a ivtv0 DMA TIMEOUT message on my console.
> When i break off the action (after about 30 seconds or so), the tmp0.mpg file 
> has a 0 size, indicating nothing at all was recorded.
> 
> Is there something i can do about this? Or am i just asking too much of the 
> system right now? I also tried various swiotlb options (on 3.2 those were 
> absolutely necessary), but to no avail.
> 
> Any hints/tips would be very much appreciated!
> 

Maybe this wiki page helps?:
http://wiki.xensource.com/xenwiki/XenPCIpassthrough

-- Pasi


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