Re: [Xen-users] Shared interrupt in 2 domains: cards disabled

[Anthony Liguori <aliguori@xxxxxxxxxx>]

Arie Kraai wrote:

> > Xen 2.0-testing gave me a problem when a domain (using a dom0 kernel)
> > tried to use a soundcard (hidden from dom0):
> > with the same IRQ as the network-card in dom0:
> >
> > The card produced sound for 4 seconds, then went mute. Moreover, the
> > dom0 network-card also stopped operating (only xen-br0 still worked) and
> > could not be brought back to life, not even after stopping all domains
> > and xend:
> > I had to reboot the system...
> > Is this a bug or should there be no shared interrupts at all between
> > domains?
> >    
> The situation is even worse: using a USB device in domU (hidden from
> dom0) with the same interrupt as a SATA controller in dom0 corrupted the
> SATA-disk in dom0!
>  
I'm seeing something very similiar.  I've got USB, Sound, and Ethernet 
all on a shared IRQ.  The devices are only being used in dom0 and if any 
two out of the three are used rigoriously at the same time (say playing 
an MP3 and downloading a large file) all of the devices hang.
FWIW, I have a bug entry in bugzilla about it.  You may want to take a 
look at it and add some additional comments.
I didn't experience these problems until the ACPI code was reworked.

http://bugzilla.xensource.com/cgi-bin/bugzilla/show_bug.cgi?id=76

Regards,

Anthony Liguori

> Please, does anyone have a clue about what's going on with shared
> interrupts?
>
> Thanks, Arie Kraai
>
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>  

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