From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [Qemu-devel] [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices... Date: Tue, 10 Jul 2018 04:58:13 +0300 Message-ID: <20180710045614-mutt-send-email-mst@kernel.org> References: <20180629221907.3662-1-venu.busireddy@oracle.com> <20180702161404.GA2339@rkaganb.sw.ru> <449f1449-ddf6-cd95-976c-14d04d8d503a@oracle.com> <20180703095825.GC30904@rkaganb.sw.ru> <20180709130035.GA6271@rkaganb.sw.ru> <9136094e-a510-4201-7c71-d1c49226fa5f@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Roman Kagan , Venu Busireddy , Marcel Apfelbaum , virtio-dev@lists.oasis-open.org, qemu-devel@nongnu.org, sridhar.samudrala@intel.com, alexander.h.duyck@intel.com, netdev@vger.kernel.org To: si-wei liu Return-path: Sender: List-Post: List-Help: List-Unsubscribe: List-Subscribe: Content-Disposition: inline In-Reply-To: <9136094e-a510-4201-7c71-d1c49226fa5f@oracle.com> List-Id: netdev.vger.kernel.org On Mon, Jul 09, 2018 at 06:11:53PM -0700, si-wei liu wrote: > What do we buy > for using a random address during initial discovery and requiring VF to > complete the handshake? I don't see advantages to using a random address that is then changed either: changing a MAC causes network downtime for most users. > Less network downtime during datapath switching? > Sorry but that's not a key factor at all for our main goal - live migration. Isn't avoiding downtime what makes the migration "live"? If you don't care about it at all just remove the device and migrate without all these tricks. -- MST From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: virtio-dev-return-4658-cohuck=redhat.com@lists.oasis-open.org Sender: List-Post: List-Help: List-Unsubscribe: List-Subscribe: Received: from lists.oasis-open.org (oasis-open.org [10.110.1.242]) by lists.oasis-open.org (Postfix) with ESMTP id 17B48985B04 for ; Tue, 10 Jul 2018 01:58:15 +0000 (UTC) Date: Tue, 10 Jul 2018 04:58:13 +0300 From: "Michael S. Tsirkin" Message-ID: <20180710045614-mutt-send-email-mst@kernel.org> References: <20180629221907.3662-1-venu.busireddy@oracle.com> <20180702161404.GA2339@rkaganb.sw.ru> <449f1449-ddf6-cd95-976c-14d04d8d503a@oracle.com> <20180703095825.GC30904@rkaganb.sw.ru> <20180709130035.GA6271@rkaganb.sw.ru> <9136094e-a510-4201-7c71-d1c49226fa5f@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9136094e-a510-4201-7c71-d1c49226fa5f@oracle.com> Subject: [virtio-dev] Re: [Qemu-devel] [PATCH v3 0/3] Use of unique identifier for pairing virtio and passthrough devices... To: si-wei liu Cc: Roman Kagan , Venu Busireddy , Marcel Apfelbaum , virtio-dev@lists.oasis-open.org, qemu-devel@nongnu.org, sridhar.samudrala@intel.com, alexander.h.duyck@intel.com, netdev@vger.kernel.org List-ID: On Mon, Jul 09, 2018 at 06:11:53PM -0700, si-wei liu wrote: > What do we buy > for using a random address during initial discovery and requiring VF to > complete the handshake? I don't see advantages to using a random address that is then changed either: changing a MAC causes network downtime for most users. > Less network downtime during datapath switching? > Sorry but that's not a key factor at all for our main goal - live migration. Isn't avoiding downtime what makes the migration "live"? If you don't care about it at all just remove the device and migrate without all these tricks. -- MST --------------------------------------------------------------------- To unsubscribe, e-mail: virtio-dev-unsubscribe@lists.oasis-open.org For additional commands, e-mail: virtio-dev-help@lists.oasis-open.org