From mboxrd@z Thu Jan 1 00:00:00 1970 From: Patrick McHardy Subject: Re: [ofa-general] Re: [PATCH v4 14/14] QLogic VNIC: sysfs Documentation Date: Thu, 19 Jun 2008 03:26:45 +0200 Message-ID: <4859B5D5.4090903@trash.net> References: <20080610205633.11186.45499.stgit@dale> <20080610210918.11186.64253.stgit@dale> <484F751F.7030407@trash.net> <48513E4E.4040601@trash.net> <20080614190358.GU22807@obsidianresearch.com> <48562A41.7000304@trash.net> <71d336490806180532g4ea7067akc157581cb1fa946d@mail.gmail.com> <485901A8.8060705@trash.net> <20080618182148.GD28285@obsidianresearch.com> <4859B412.7010204@trash.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Cc: Ramachandra K , Amar Mudrankit , netdev@vger.kernel.org, general@lists.openfabrics.org, rdreier@cisco.com, poornima.kamath@qlogic.com To: Jason Gunthorpe Return-path: Received: from stinky.trash.net ([213.144.137.162]:48302 "EHLO stinky.trash.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750984AbYFSB0s (ORCPT ); Wed, 18 Jun 2008 21:26:48 -0400 In-Reply-To: <4859B412.7010204@trash.net> Sender: netdev-owner@vger.kernel.org List-ID: Patrick McHardy wrote: > Jason Gunthorpe wrote: >> On Wed, Jun 18, 2008 at 02:38:00PM +0200, Patrick McHardy wrote: >> >>>> Currently we register netdevice only after we have made sure that >>>> we can connect to the EVIC and that there are enough resources on >>>> the EVIC to support this virtual ethernet interface. But if we >>>> register the netdevice without making sure that we can reach the >>>> EVIC and that it has resources, there is a possibility that we >>>> register a netdevice that can never become active. > >> >>> Thats similar to a ethernet device that never has a cable >>> plugged in. You should register the device with its carrier >>> turned off, then change the carrier state once the connection >>> has been established. >> >> I would also encourage you to embrace this view of the VNIC as a >> tunnel fully and let the administrator re-target an active netdevice >> to a different VNIC without tearing down the netdevice.. Maybe I misparsed this, sorry Jason :)