Re: [Qemu-devel] [PATCH 2/2] rtl8139: flush queued packets when RxBufPtr is written

2013-05-27 Thread Stefan Hajnoczi
On Fri, May 24, 2013 at 05:18:09PM +0200, Paolo Bonzini wrote: > Il 24/05/2013 16:38, Stefan Hajnoczi ha scritto: > > diff --git a/hw/net/rtl8139.c b/hw/net/rtl8139.c > > index 9369507..7993f9f 100644 > > --- a/hw/net/rtl8139.c > > +++ b/hw/net/rtl8139.c > > @@ -2575,6 +2575,9 @@ static void rtl813

Re: [Qemu-devel] [PATCH 2/2] rtl8139: flush queued packets when RxBufPtr is written

2013-05-24 Thread Paolo Bonzini
Il 24/05/2013 16:38, Stefan Hajnoczi ha scritto: > Net queues support efficient "receive disable". For example, tap's file > descriptor will not be polled while its peer has receive disabled. This > saves CPU cycles for needlessly copying and then dropping packets which > the peer cannot receive.