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Re: [Qemu-devel] Re: [PATCH v2 9/9] Add -kvm option

From: Anthony Liguori
Subject: Re: [Qemu-devel] Re: [PATCH v2 9/9] Add -kvm option
Date: Thu, 08 Oct 2009 09:56:49 -0500
User-agent: Thunderbird (X11/20090825)

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...


Anthony Liguori

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