Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755200AbXIOOEO (ORCPT ); Sat, 15 Sep 2007 10:04:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751684AbXIOOD5 (ORCPT ); Sat, 15 Sep 2007 10:03:57 -0400 Received: from smtp.opengridcomputing.com ([71.42.183.126]:41049 "EHLO smtp.opengridcomputing.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750983AbXIOOD4 (ORCPT ); Sat, 15 Sep 2007 10:03:56 -0400 Message-ID: <46EBE649.3040303@opengridcomputing.com> Date: Sat, 15 Sep 2007 09:03:53 -0500 From: Steve Wise User-Agent: Thunderbird 2.0.0.6 (Windows/20070728) MIME-Version: 1.0 To: Roland Dreier CC: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, general@lists.openfabrics.org Subject: Re: [ofa-general] InfiniBand/RDMA merge plans for 2.6.24 References: <46E97BB0.9030106@opengridcomputing.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2262 Lines: 55 Roland Dreier wrote: > > I was about to post v2 of my patch to avoid port space collisions with > > the native stack. Can we get that 2.6.24? It is high priority > > IMO. I've tried to solicit review on it, but I think folks are > > reluctant... ;-) > > I would like to get this in, but I'm still at least a little > reluctant, since we would be committing to a user interface that seems > a little awkward at best, so I'd like to try and find something > better. Just to summarize my understanding: > > - your patch requires the administration to configure an ethX:iwY > alias address to use iwarp. (By the way is there anything other > than "don't do that" that avoids assigning the same address to the > iwarp alias and a non-iwarp interface?) > Nope. Its totally up to the admin to create the ethX:iwY interface -and- to segment his services so host TCP runs on the ethX subnet(s) and the iwarp rdma ones run on ethX:iwY subnet(s). Without changing the core network serices, I don't see any way around this. > - it would be nicer to create the alias automatically, but an alias > without an address doesn't make sense. Creating a whole separate > net device causes problems because the iwarp stuff still needs to > use the main net device to do ARP etc. > I do log a warning if an iwarp application binds to address 0.0.0.0 and there are no ethX:iwY address available. > - so I'm out of better ideas but I still want to push back a little > before we commit to something ugly. > Me 2. :-( > I've been meaning to track down the bnx2 iscsi offload patch to look > and see if this issue is addressed, since the same problem seems to > exist: it seems an iscsi connection and a main stack tcp connection > might share the same 4-tuple unless something is done to avoid that > happening. > > Also, I think it behooves us to get some agreement on this approach > with NetEffect and Kanoj (NetXen?) at least, since their iwarp drivers > seem to be imminent. > > - R. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/