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

[Rolu <rolu@xxxxxxxx>]

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!

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