From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yuanhan Liu Subject: Re: [PATCH 0/4 for 2.3] vhost-user live migration support Date: Fri, 11 Dec 2015 17:49:34 +0800 Message-ID: <20151211094934.GX29571@yliu-dev.sh.intel.com> References: <000001d133ed$b2446eb0$16cd4c10$@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: dev@dpdk.org To: Pavel Fedin Return-path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by dpdk.org (Postfix) with ESMTP id 2185A8E7A for ; Fri, 11 Dec 2015 10:49:25 +0100 (CET) Content-Disposition: inline In-Reply-To: <000001d133ed$b2446eb0$16cd4c10$@samsung.com> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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 > >