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Subject: Re: [virtio-dev] [PATCH v4] content: Introduce VIRTIO_NET_F_STANDBY feature
On Wed, 12 Sep 2018 11:22:12 -0400 "Michael S. Tsirkin" <mst@redhat.com> wrote: > On Wed, Sep 12, 2018 at 08:17:45AM -0700, Samudrala, Sridhar wrote: > > > > > > On 9/7/2018 2:34 PM, Michael S. Tsirkin wrote: > > > On Wed, Aug 15, 2018 at 11:49:15AM -0700, Sridhar Samudrala wrote: > > > > VIRTIO_NET_F_STANDBY feature enables hypervisor to indicate virtio_net > > > > device to act as a standby for another device with the same MAC address. > > > > > > > > Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com> > > > > Acked-by: Cornelia Huck <cohuck@redhat.com> > > > > Fixes: https://github.com/oasis-tcs/virtio-spec/issues/18 > > > Applied but when do you plan to add documentation as pointed > > > out by Jan and Halil? > > > > I thought additional documentation will be done as part of the Qemu enablement > > patches and i hope someone in RH is looking into it. > > > > Does it make sense to add a link to to the kernel documentation of this feature in > > the spec > > https://www.kernel.org/doc/html/latest/networking/net_failover.html > > > I do not think this will address the comments posted. Specifically we > should probably include documentation for what is a standby and primary: > what is expected of driver (maintain configuration on standby, support > primary coming and going, transmit on standby only if there is no > primary) and of device (have same mac for standby as for standby). Yes, we need some definitive statements of what a driver and a device is supposed to do in order to conform; it might make sense to discuss this in conjunction with discussion on any QEMU patches (have not checked whether anything has been posted, just returned from vacation). I assume that we still stick with the plan to implement/document MAC-based handling first and then enhance with other methods later?
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