From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailout2.w1.samsung.com (mailout2.w1.samsung.com [210.118.77.12]) by dpdk.org (Postfix) with ESMTP id 8CEDEE62 for ; Tue, 15 Dec 2015 16:36:46 +0100 (CET) Received: from eucpsbgm2.samsung.com (unknown [203.254.199.245]) by mailout2.w1.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTP id <0NZE0063POP9S020@mailout2.w1.samsung.com> for dev@dpdk.org; Tue, 15 Dec 2015 15:36:45 +0000 (GMT) X-AuditID: cbfec7f5-f79b16d000005389-be-5670338c1d20 Received: from eusync3.samsung.com ( [203.254.199.213]) by eucpsbgm2.samsung.com (EUCPMTA) with SMTP id 5E.B3.21385.C8330765; Tue, 15 Dec 2015 15:36:44 +0000 (GMT) Received: from fedinw7x64 ([106.109.131.169]) by eusync3.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTPA id <0NZE009CCOP8HD70@eusync3.samsung.com>; Tue, 15 Dec 2015 15:36:44 +0000 (GMT) From: Pavel Fedin To: 'Thibaut Collet' , 'Yuanhan Liu' References: <000001d133ed$b2446eb0$16cd4c10$@samsung.com> <20151211094934.GX29571@yliu-dev.sh.intel.com> <001c01d133fd$d3a7d870$7af78950$@samsung.com> <20151214035842.GB18437@pxdev.xzpeter.org> <20151215082324.GG29571@yliu-dev.sh.intel.com> <007f01d13715$042a0a80$0c7e1f80$@samsung.com> <20151215100548.GD32243@pxdev.xzpeter.org> <20151215131812.GI29571@yliu-dev.sh.intel.com> In-reply-to: Date: Tue, 15 Dec 2015 18:36:43 +0300 Message-id: <00f501d1374e$670eb950$352c2bf0$@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=UTF-8 Content-transfer-encoding: quoted-printable X-Mailer: Microsoft Outlook 14.0 Thread-index: AQOYHvn87qB/n3eE/cMtloPRrGw32gEpxH/xAfOP4FMB9WC4FAK9V+xZANbfXxkC1IozlQF4nG1RAiBA49ABelhrUAEkKPSHmrDHNxA= Content-language: ru X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrALMWRmVeSWpSXmKPExsVy+t/xq7o9xgVhBh1XrCzefdrOZLFl/zd2 i+6ee+wWiw8cZra4PuECqwOrx8X+O4wevxYsZfWYdzLQ4/2+q2wBLFFcNimpOZllqUX6dglc GbdmP2YqWM1e0XDwElMD43fWLkZODgkBE4mP9y4zQ9hiEhfurWfrYuTiEBJYyihx6tYjZgjn O6PE23NHmUCq2ATUJU5//cACYosIxEnsnLYfKM7BwSwQLbHmqyJIWEjgNovE5AVVIDanQLBE e8s0sHJhAV+Jl0ufgI1hEVCVODkTIs4rYCnRNf8IlC0o8WPyPTCbGWjVpHmLmCFsbYkn7y5A Ha0gsePsa0aIEyokGv53MUHUiEhM+3ePeQKj0Cwko2YhGTULyahZSFoWMLKsYhRNLU0uKE5K zzXSK07MLS7NS9dLzs/dxAiJh687GJceszrEKMDBqMTDu4A5P0yINbGsuDL3EKMEB7OSCO9F 9YIwId6UxMqq1KL8+KLSnNTiQ4zSHCxK4rwzd70PERJITyxJzU5NLUgtgskycXBKNTAKm524 F3XRe+Ks3IUcVgv8L3CYfTheI5Eb97cw8ELz8SIGe+3lmpt53kgukEu9dWhKNaMw6/Fpv1V/ xSQeEVa9PtHk70XlSpP5nK9S61MtM+TLxF8vultx6uxnDaWyFq8jM7OiLbI1ZsTp+m3YZjdR 1lLq36k0SQ1xWe35cplWkXK90Ra6X5RYijMSDbWYi4oTAV/EOV+DAgAA Cc: dev@dpdk.org, 'Victor Kaplansky' Subject: Re: [dpdk-dev] [PATCH 0/4 for 2.3] vhost-user live migration support X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Dec 2015 15:36:46 -0000 Hello! =20 > After a migration, to avoid netwotk outage, all interfaces of the = guest must send a packet to update switches mapping (ideally a GARP). > As some interfaces do not do it QEMU does it in behalf of the guest by = sending a RARP (his RARP is not forged by the guest but by QEMU). This = is the > qemu_self_announce purpose that "spoofs" a RARP to all backend of = guest ethernet interfaces. For vhost-user backend, QEMU can not do it = directly Aha, see it now. qemu_announce_self() uses qemu_foreach_nic(), which = actually iterates only over NET_CLIENT_OPTIONS_KIND_NIC interfaces. I = expect these are fully emulated hardware controllers. virtio uses = another type (see enum NetClientOptionsKind). So, we can happily ignore qemu_announce_self(), it does not do anything = for us. Thanks for pointing it out. Kind regards, Pavel Fedin Expert Engineer Samsung Electronics Research center Russia