[Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon

[Michael S. Tsirkin]

On Mon, Dec 07, 2009 at 02:16:33PM +0100, Gerd Hoffmann wrote:
> On 12/07/09 14:03, Michael S. Tsirkin wrote:
>> Also - why not simply use virtio? I assume you are talking about
>> guests with virtio support otherwise MSI support in virtio
>> won't matter for them.
>
> Point.  Guests with virtio-console+balloon most likely can use virtio  
> for storage+net too, so nothing performance-critical is left in ioapic  
> irq space and IRQ sharing for the leftovers (just usb I think) shouldn't  
> be a big issue.
>
>>> Yes.  Three for balloon, but that can easily changed to two.
>>
>> Yes, please, make this change for 0.12.
>
> We can also simply drop this ...
>
>> No, but changing this will need updating guests.
>
> ... or postphone until we have the "one MSI-X vector" support working.

OK.
Anthony, could you drop this from staging for now please?

Gerd, any idea whether "one MSI-X vector" feature is worth pursuing?

-- 
MST