Re: [Xen-users] Guest domain with PCI frontend disabled IRQ, backend device dies

[Itai Tavor <itai@xxxxxxxxx>]

On 05/06/2006, at 5:25 PM, Emmanuel Dreyfus wrote:

> Itai Tavor <itai@xxxxxxxxx> wrote:
>
> > I'm having a problem with a guest domain which is using PCI cards.
> > The symptom is that as soon as one of the cards is accessed in the
> > guest, the guest's console shows "Disabled IRQ #16" and the whole
> > system loses networking. Networking is restored when I shut down the
> > guest.
> I have exactly the same problem, with an athlon running NetBSD/ 
> i386, IRQ
> 5 is allocated to ethernet, USB and the video capture board. I try to
> export the video capture board to domU, but when the domU kernel  
> try to
> use it, the machine loose networking. Obviously, IRQ are not correctly
> routed.
>
> I have not found how I can allocate a different IRQ to this board.
Sounds like you're not using acpi... when I tried that I had even  
worse IRQ problems. With it on at least the kernel can allocate IRQ's  
above 15 so it can avoid sharing interrupts, it only falls down when  
a guest uses the same ones...
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