On Fri, Dec 11, 2015 at 11:26:55AM +0300, Pavel Fedin wrote:
> Hello!
>
> I am currently testing this patchset with qemu and have problems.
Hi,
Thanks for testing!
>
> The guest migrates correctly, but after the migration it cries in the log:
>
> Vhost user backend fails to broadcast fake RARP
Yes, because I have enabled it yet on DPDK side, and I was intended to
try it in the v2 patchset, which is likely to be sent out next week.
--yliu
>
> and pinging the (new) host doesn't work. When i migrate it back to the old
> host, the network resumes working.
>
> I have analyzed the code, and this problem happens because we support
> neither VHOST_USER_PROTOCOL_F_RARP, nor
> VIRTIO_NET_F_GUEST_ANNOUNCE. Since the latter seems to be related only to
> guest, i simply enabled it in qemu by force, and after
> this the network doesn't work at all.
> Can anybody help me and explain how the thing works? I expected that
> gratuitous ARP packets are harmless, but they seem to break
> things somehow. And what was used for testing the implementation?
>
> Kind regards,
> Pavel Fedin
> Expert Engineer
> Samsung Electronics Research center Russia
>
>
