Re: NetBSD dom0 PVH: hardware interrupts stalls

[Manuel Bouyer <bouyer@xxxxxxxxxxxxxxx>]

On Fri, Nov 20, 2020 at 09:59:57AM +0100, Jan Beulich wrote:
> Well, anything coming through the LAPIC needs ack-ing (except for
> the spurious interrupt of course), or else ISR won't get updated
> and further interrupts at this or lower priority can't be serviced
> (delivered) anymore. This includes interrupts originally coming
> through the IO-APIC. But the same constraint / requirement exists
> on baremetal.

OK, so even if I didn't see where this happens, it's happening.
Is it what's Xen is using as ACK from the dom0 for a IOAPIC
interrupt, or is it something else (at the IOAPIC level) ?

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