Re: [RFC] Virtual Machine Device Queues(VMDq) support on KVM

[Arnd Bergmann]

On Tuesday 22 September 2009, Stephen Hemminger wrote:
> > My idea for that was to open multiple file descriptors to the same
> > macvtap device and let the kernel figure out the  right thing to
> > do with that. You can do the same with raw packed sockets in case
> > of vhost_net, but I wouldn't want to add more complexity to the
> > tun/tap driver for this.
> > 
> Or get tap out of the way entirely. The packets should not have
> to go out to user space at all (see veth)

How does veth relate to that, do you mean vhost_net? With vhost_net,
you could still open multiple sockets, only the access is in the kernel.
Obviously, once it all is in the kernel, that could be done under the
covers, but I think it would be cleaner to treat vhost_net purely as
a way to bypass the syscalls for user space, with as little as possible
visible impact otherwise.

	Arnd <><
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/