Re: [Qemu-devel] [PATCH v2] net-hub: Drop can_receive

[Fam Zheng <famz@redhat.com>]

On Mon, 07/20 18:07, Stefan Hajnoczi wrote:
> On Tue, Jul 07, 2015 at 05:41:56PM +0800, Fam Zheng wrote:
> > On Tue, 07/07 09:37, Stefan Hajnoczi wrote:
> > > On Tue, Jul 07, 2015 at 02:30:30PM +0800, Fam Zheng wrote:
> > > > This moves the semantics from net_hub_port_can_receive to receive
> > > > functions, by returning 0 if all receiving ports return 0. Also,
> > > > remember to flush the source port's queue in that case.
> > > > 
> > > > Signed-off-by: Fam Zheng <famz@redhat.com>
> > > > ---
> > > >  net/hub.c | 54 +++++++++++++++++++++++++++++-------------------------
> > > >  1 file changed, 29 insertions(+), 25 deletions(-)
> > > 
> > > This patch revision doesn't take into account the special case code in
> > > qemu_flush_or_purge_queued_packets(), which I mentioned in my reply to
> > > the previous revision of this patch.
> > > 
> > > The queue is now flushed twice because you've introduced
> > > net_hub_port_send_cb() but qemu_flush_or_purge_queued_packets() already
> > > calls net_hub_flush().
> > > 
> > > If you want to get rid of net_hub_flush(), that's great.  But please
> > > remove the duplicate code.
> > 
> > Right, I missed that. I'll remove the duplicate and send again.
> 
> Ping?

I thought the net_hub_flush in qemu_flush_or_purge_queued_packets already makes
sure net-hub is working, so it's just about cleaning up. That's why I deferred
this to 2.5.  Am I wrong?

Fam