Re: NetBSD dom0 PVH: hardware interrupts stalls

[Manuel Bouyer <bouyer@xxxxxxxxxxxxxxx>]

On Mon, Nov 23, 2020 at 06:06:10PM +0100, Roger Pau Monné wrote:
> OK, I'm afraid this is likely too verbose and messes with the timings.
> 
> I've been looking (again) into the code, and I found something weird
> that I think could be related to the issue you are seeing, but haven't
> managed to try to boot the NetBSD kernel provided in order to assert
> whether it solves the issue or not (or even whether I'm able to
> repro it). Would you mind giving the patch below a try?

With this, I get the same hang but XEN outputs don't wake up the interrupt
any more. The NetBSD counter shows only one interrupt for ioapic2 pin 2,
while I would have about 8 at the time of the hang.

So, now it looks like interrupts are blocked forever. At
http://www-soc.lip6.fr/~bouyer/xen-log5.txt
you'll find the output of the 'i' key.

-- 
Manuel Bouyer <bouyer@xxxxxxxxxxxxxxx>
     NetBSD: 26 ans d'experience feront toujours la difference
--