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[Xen-users] Re: [Xen-devel] Re: HVM DomU, msi_translate=0, MSI/MSI-X PCI

To: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
Subject: [Xen-users] Re: [Xen-devel] Re: HVM DomU, msi_translate=0, MSI/MSI-X PCI passthrough fails.
From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Date: Wed, 8 Dec 2010 12:43:04 -0500
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, Mark Adams <mark@xxxxxxxxxxxxxxxxxx>
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On Wed, Dec 08, 2010 at 06:18:06PM +0100, Sander Eikelenboom wrote:
> And another thread with problems and strange irq reports with regard to the 
> 82754
> http://www.linuxquestions.org/questions/linux-hardware-18/intel-82574l-gigabit-network-card-issues-and-resolution-831364/

Ugh, that device sure looks to have some faults.

So I think I've confused myself. There was another person who tried a similar
pass-through to an HVM guest of a sound card. While it worked it did not seem
to work that well and spitted out lots of warnings. But those are quite
different from what Mark had.

Mark, right now we are all busy trying to get patches ready for 2.6.38 so
hence the reason for not being so fast at responding to you or trying to
reproduce this on our machines.

The RAID is troubling, but the neat thing about it is that it hangs your
machine so if you hit all of those debug options via the serial console,
it can help us narrow down on where the problem is. The other issues you have
- well, there are many posibilities (and it might be very well the same issue
you are hitting with the RAID card) and narrowing it down to the exact cause
(say - it might be what Sander suggested - one of the NICs is just funky or 
needs a firmware update) can help here.

The latest kernel is (I think?) and the latest xen-unstable.hg has
some fixes to the MSI ownership and some IRQ migration issues fixed.

> (please Mr. Konrad, no "Mr." that makes me feel really really old ;-) )

Sure thing :-)

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