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Re: [Xen-devel] pci adapter not working in dom0. works under plain Linux.

On Sun, Jun 08, 2014 at 11:01:25AM +0000, James Harper wrote:
> I bought an unsupported DVB card (by mistake - I bought the v2 version 
> instead of the supported v1 version), and I've just finished getting it 
> working under Linux, but spent the last day or so trying to figure out why it 
> keeps dropping buffers even though the reception is perfect. As soon as I 
> noticed that the lost data is always in PAGE_SIZE multiples, I figured I'd 
> better boot in plain Linux instead of Xen, and when I did that it worked 
> perfectly.

What happens if you boot dom0 with 'dom0_mem=max:1G' and limit the amount of 
Xen sees by using 'mem=4G' on the Xen command line?

> The card is based on the cx23885 chipset, which is already supported (my work 
> is just porting a different tuner/demod), so I suspect it's actually a bug in 
> the existing cx23885 driver. I'm hoping there is just a flag missing or 
> something when the adapter allocates buffers for DMA. Can anyone offer any 
> suggestions as to what I'm looking for before I dive in?
> Thanks
> James
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