[Pkg-xen-devel] Bug#810379: Bug#810379: xen: pci-passthrough generates "xen:events: Failed to obtain physical IRQ" for some devices

[Ian Campbell]

On Fri, 2016-01-08 at 17:19 +0100, Tommi Airikka wrote:
> Source: xen
> Severity: normal
> 
> Dear Maintainer,
> 
> After an upgrade, my passthroughed NIC stopped working.
> I created a new jessie domU and tried to passthrough some PCI devices
> and found that both USB3 host controller and tg3 NIC generated these
> lines in domU dmesg:
> 
> xen:events: Failed to obtain physical IRQ 31
> xen:events: Failed to obtain physical IRQ 32
> xen:events: Failed to obtain physical IRQ 33

Thanks for the report. I think this is as likely to be a dom0/domU kernel
(i.e. pciback/front) issue as a hypervisor one, but I'm not sure.

Would you mind reporting this to upstream per:
    http://wiki.xen.org/wiki/Reporting_Bugs_against_Xen
please.

We could forward it but I expect there will need to be some back and forth
with the maintainers so it makes sense for you to speak to them directly.
You can CC 810379 at bugs.debian.org to keep this bug in the loop.

In addition to the information you provide here I would expect upstream to
want to see the dom0 lspci for the devices you are passing through, as well
as dom0's /proc/interrupts and probably full "xl dmesg" and dmesg from both
dom0 and domU.

Thanks,
Ian.