Re: Issue about domU missing interrupt

Mats Petersson
Mon, 03 Dec 2012 10:15:08 -0000

On 03/12/12 03:47, G.R. wrote:
> Hi developers,
> I met some domU issues and the log suggests missing interrupt.
> Details from here:
> http://www.gossamer-threads.com/lists/xen/users/263938#263938
> In summary, this is the suspicious log:
>
> (XEN) vmsi.c:122:d32767 Unsupported delivery mode 3
>
> I''ve checked the code in question and found that mode 3 is an
> ''reserved_1'' mode.
> I want to trace down the source of this mode setting to root-cause the
> issue.
> But I''m not an xen developer, and am even a newbie as a xen user.
> Could anybody give me instructions about how to enable detailed debug log?
> It could be better if I can get advice about experiments to perform /
> switches to try out etc.
>
> My SW config:
> dom0: Debian wheezy (3.6 experimental kernel, xen 4.1.3-4)
> domU: Debian wheezy 3.2.x stock kernel.
>
> Thanks,
> Timothy
Are you passing hardware (PCI Passthrough) to the HVM guest?
What are the exact messages in the DomU?

--
Mats