"Michael S. Tsirkin" [off-list ref] writes:

On Fri, May 24, 2013 at 05:41:11PM +0800, Jason Wang wrote:

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On 05/23/2013 04:50 PM, Michael S. Tsirkin wrote:

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Hey guys,
I've updated the kvm networking todo wiki with current projects.
Will try to keep it up to date more often.
Original announcement below.

Thanks a lot. I've added the tasks I'm currently working on to the wiki.

btw. I notice the virtio-net data plane were missed in the wiki. Is the
project still being considered?

It might have been interesting several years ago, but now that linux has
vhost-net in kernel, the only point seems to be to
speed up networking on non-linux hosts.

Data plane just means having a dedicated thread for virtqueue processing
that doesn't hold qemu_mutex.

Of course we're going to do this in QEMU.  It's a no brainer.  But not
as a separate device, just as an improvement to the existing userspace
virtio-net.

Since non-linux does not have kvm, I doubt virtio is a bottleneck.

FWIW, I think what's more interesting is using vhost-net as a networking
backend with virtio-net in QEMU being what's guest facing.

In theory, this gives you the best of both worlds: QEMU acts as a first
line of defense against a malicious guest while still getting the
performance advantages of vhost-net (zero-copy).

IMO yet another networking backend is a distraction,
and confusing to users.
In any case, I'd like to see virtio-blk dataplane replace
non dataplane first. We don't want two copies of
virtio-net in qemu.

100% agreed.

Regards,

Anthony Liguori

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I've put up a wiki page with a kvm networking todo list,
mainly to avoid effort duplication, but also in the hope
to draw attention to what I think we should try addressing
in KVM:

http://www.linux-kvm.org/page/NetworkingTodo

This page could cover all networking related activity in KVM,
currently most info is related to virtio-net.

Note: if there's no developer listed for an item,
this just means I don't know of anyone actively working
on an issue at the moment, not that no one intends to.

I would appreciate it if others working on one of the items on this list
would add their names so we can communicate better.  If others like this
wiki page, please go ahead and add stuff you are working on if any.

It would be especially nice to add autotest projects:
there is just a short test matrix and a catch-all
'Cover test matrix with autotest', currently.

Currently there are some links to Red Hat bugzilla entries,
feel free to add links to other bugzillas.

Thanks!