Re: [Xen-devel] Issue with MSI in a HVM domU with several passed through PCI devices

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Fri, 29 Jun 2012, Rolu wrote:
> On Thu, Jun 28, 2012 at 12:49 PM, Stefano Stabellini
> <stefano.stabellini@xxxxxxxxxxxxx> wrote:
> > On Wed, 27 Jun 2012, Rolu wrote:
> >> > That's because msitranslate is still enabled somehow, that is a
> >> > toolstack bug.
> >> > While we fix that bug, could you try this QEMU patch to forcefully 
> >> > disable
> >> > msitranslate?
> >> >
> >>
> >> This worked!
> >>
> >> The "unsupported delivery mode" message is gone. Sound works, although
> >> there is still occasionally a very short stutter, but I expect that's
> >> a different issue. I've been testing with a KDE desktop with 3D
> >> effects (cube, expo, that sort of stuff) and performance there has
> >> gone up noticeably, from around 30-40 fps in most cases to near 60.
> >
> > Great, good to hear!
> > Now that we have narrowed down the issue to msitranslate (that should be
> > disabled by default anyway), I would like to fix it entirely if possible.
> > Could you please try the appended patch, without any other patches
> > (therefore msitranslate would still be enabled)?
> >
> > Thanks for testing!!
> >
> 
> I've reverted the previous patch and applied this one, and I'm pleased
> to report it's still working. Thanks for your help!
> 

Thanks for testing! I am going to send the patch and add your tested-by.

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