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SubjectRe: [PATCH 2/2] vhost_net: a kernel-level virtio server
On Wed, Aug 12, 2009 at 02:22:38PM -0500, Anthony Liguori wrote:
> Michael S. Tsirkin wrote:
>>>
>>> We discussed this before, and I still think this could be directly derived
>>> from struct virtqueue, in the same way that vring_virtqueue is derived from
>>> struct virtqueue.
>>>
>>
>> I prefer keeping it simple. Much of abstraction in virtio is due to the
>> fact that it needs to work on top of different hardware emulations:
>> lguest,kvm, possibly others in the future. vhost is always working on
>> real hardware, using eventfd as the interface, so it does not need that.
>>
>
> Actually, vhost may not always be limited to real hardware.

Yes, any ethernet device will do. What I mean is that vhost does not
deal with emulation at all. All setup is done in userspace.

>
> We may on day use vhost as the basis of a driver domain. There's quite
> a lot of interest in this for networking.

You can use veth for this. This works today.

> At any rate, I'd like to see performance results before we consider
> trying to reuse virtio code.
>
> Regards,
>
> Anthony Liguori


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