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Date: Thu, 08 Oct 2009 09:56:49 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] Re: [PATCH v2 9/9] Add -kvm option
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To: Avi Kivity <avi@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>, Anthony Liguori <aliguori@us.ibm.com>, Gerd Hoffmann <kraxel@redhat.com>, Glauber Costa <glommer@redhat.com>, qemu-devel@nongnu.org

Avi Kivity wrote:
> That's a bug in the userspace pit :)
>
> I'm worried about things like 'info pit' needing dual implementations.

You mean info qdm?

It'll Just Work.

>>> We'll have the same problem with vhost-net, only there the 
>>> duplication will be much greater if we split the implementation.
>>
>> I'd rather not treat vhost-net like a device model and instead treat 
>> it like a -net backend.  If we can bounce requests through userspace 
>> (and we can), we should be able to use it for any device model.  In 
>> the case of virtio-net, we should be able to short-circuit things 
>> such that we don't have to go through userspace.  It's admittedly 
>> very hairy without a point-to-point net abstraction.
>>
>
> Interesting idea.  I think it'll be hairy even with a point-to-point 
> net abstraction, but it's worth trying.

Could be interesting trying to tie the e1000 to vhost-net performance 
wise...

Regards,

Anthony Liguori