"Michael S. Tsirkin" <mst@xxxxxxxxxx> writes: > On Fri, May 24, 2013 at 05:41:11PM +0800, Jason Wang wrote: >> On 05/23/2013 04:50 PM, Michael S. Tsirkin wrote: >> > 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 > >> > ---- >> > >> > 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! >> > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
