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[Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon |
Date: |
Mon, 7 Dec 2009 16:13:39 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
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
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Michael S. Tsirkin, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Gerd Hoffmann, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Michael S. Tsirkin, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Gerd Hoffmann, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Michael S. Tsirkin, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Gerd Hoffmann, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon,
Michael S. Tsirkin <=
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Gerd Hoffmann, 2009/12/07
- [Qemu-devel] Re: [PATCH 2/2] virtio: enable msi-x for console+balloon, Michael S. Tsirkin, 2009/12/07