Re: [Qemu-devel] vhost acceleration broken?

["Michael S. Tsirkin" <mst@redhat.com>]

On Mon, Jul 29, 2013 at 09:25:20AM +0930, Rusty Russell wrote:
> Anthony Liguori <anthony@codemonkey.ws> writes:
> > "Michael S. Tsirkin" <mst@redhat.com> writes:
> >
> >> On Thu, Jul 25, 2013 at 04:56:05PM +0200, Andreas Färber wrote:
> >>> Am 25.07.2013 16:52, schrieb Michael S. Tsirkin:
> >>> > On Thu, Jul 25, 2013 at 08:28:00AM -0500, Anthony Liguori wrote:
> >>> >> We have a pretty awful legacy command line set that comes from years of
> >>> >> half-baked concepts and the years when too many people just committed
> >>> >> random shit to the tree.
> >>> >>
> >>> >> I think we probably need to start planning for a clean break.  Maybe
> >>> >> that's a good target for a 2.0 version...
> >>> > 
> >>> > Assuming -netdev supports all required configurations, we should
> >>> > remove -net from the -help output.
> >>> 
> >>> Peter had raised the issue of -netdev not working well with boards that
> >>> already supply a default NIC - was there a solution yet?
> >>> 
> >>> Andreas
> >>
> >> Whoever is removing -net will have to code that up. Want to do this?
> >
> > I would not rush to remove things.  If we're going to go through a
> > deprecation process, we should start with a proposal on what things
> > should be removed and go from there.
> >
> > I still don't even think -netdev is the right answer here either.
> > Wouldn't it make more sense to have something like:
> >
> > qemu -vnic tap,script=/foo/myscript
> >
> > Or something vaguely understandable by a human?
> 
> OK.  It seems to me that each net device has a host side and a guest
> side, which you can mix and match.  So the commandline should reflect
> that explicitly:
> 
>         qemu -hostdev net,[tap|user|bridge|socket|vde],....  -guestdev net,....
> 
> If you have a built-in net device on your emulated board, you've got one
> implied -guestdev net.  And similar principles apply to other things
> like consoles and disks.

I think what Peter was asking for is a way to set parameters
on the implied -guestdev (we use -netdev for this).

> Now, guest and host terms may suck.  But please pick one terminology and
> use it *everywhere*.  Documentation, code and cmdline.
> 
> Thanks,
> Rusty.