On Fri, Mar 02, 2018 at 03:14:01PM +0800, Jason Wang wrote: > > > On 2018年03月02日 11:46, Jason Baron wrote: > > Although linkspeed and duplex can be set in a linux guest via 'ethtool -s', > > this requires custom ethtool commands for virtio-net by default. > > > > Introduce a new feature flag, VIRTIO_NET_F_SPEED_DUPLEX, which allows > > the hypervisor to export a linkspeed and duplex setting. The user can > > subsequently overwrite it later if desired via: 'ethtool -s'. > > > > Linkspeed and duplex settings can be set as: > > '-device virtio-net,speed=10000,duplex=full' > > I was thinking whether or not it's better to decide the duplex by the type > of backends. > > E.g userspace and vhost-kernel implement a in fact half duplex. But dpdk > implement a full duplex. > > Thanks
OTOH it's a priority for some people to be able to support migration between different backend types. Breaking that won't be nice. > > > > where speed is [0...INT_MAX], and duplex is ["half"|"full"]. > > > > Signed-off-by: Jason Baron<jba...@akamai.com> > > Cc: "Michael S. Tsirkin"<m...@redhat.com> > > Cc: Jason Wang<jasow...@redhat.com> > > Cc:virtio-...@lists.oasis-open.org > > ---
