[dpdk-dev] [PATCH v11 5/5] net/virtio: support GUEST ANNOUNCE

[Ferruh Yigit]

On 1/16/2018 9:41 PM, Xiao Wang wrote:
> When live migration is done, for the backup VM, either the virtio
> frontend or the vhost backend needs to send out gratuitous RARP packet
> to announce its new network location.
> 
> This patch enables VIRTIO_NET_F_GUEST_ANNOUNCE feature to support live
> migration scenario where the vhost backend doesn't have the ability to
> generate RARP packet.
> 
> Brief introduction of the work flow:
> 1. QEMU finishes live migration, pokes the backup VM with an interrupt.
> 2. Virtio interrupt handler reads out the interrupt status value, and
>    realizes it needs to send out RARP packet to announce its location.
> 3. Pause device to stop worker thread touching the queues.
> 4. Inject a RARP packet into a Tx Queue.
> 5. Ack the interrupt via control queue.
> 6. Resume device to continue packet processing.
> 
> Signed-off-by: Xiao Wang <xiao.w.wang at intel.com>
> Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>


Hi Yuanhan,

This commit breaks the build!

As far as I understand you send a fix but merged into other patch, which leaves
this commit still broken.

What do you think sending a fix that can be mergable to this one, so I can
squash it on next-net?

Thanks,
ferruh