Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752526AbXJAMez (ORCPT ); Mon, 1 Oct 2007 08:34:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751790AbXJAMer (ORCPT ); Mon, 1 Oct 2007 08:34:47 -0400 Received: from mx2.netapp.com ([216.240.18.37]:37926 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751781AbXJAMep convert rfc822-to-8bit (ORCPT ); Mon, 1 Oct 2007 08:34:45 -0400 X-IronPort-AV: E=Sophos;i="4.21,216,1188802800"; d="scan'208";a="109751629" X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT Subject: RE: [ofa-general] [PATCH v3] iw_cxgb3: Support"iwarp-only"interfacestoavoid 4-tuple conflicts. Date: Mon, 1 Oct 2007 08:34:42 -0400 Message-ID: In-Reply-To: <46FD7380.6050107@ichips.intel.com> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [ofa-general] [PATCH v3] iw_cxgb3: Support"iwarp-only"interfacestoavoid 4-tuple conflicts. Thread-Index: AcgCF3FpvsZe/Mu+QlqjcGjj/IZeMQCDlSmg References: <20070923203649.8324.64524.stgit@dell3.ogc.int><46FBF8AF.9040700@ichips.intel.com><000101c8013a$41b374f0$a7cc180a@amr.corp.intel.com><46FD5A2F.7010409@opengridcomputing.com> <46FD7380.6050107@ichips.intel.com> From: "Kanevsky, Arkady" To: "Sean Hefty" Cc: , , , X-OriginalArrivalTime: 01 Oct 2007 12:34:44.0631 (UTC) FILETIME=[72341270:01C80427] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2488 Lines: 69 Sean, Not so simple. How does client application knows where to connect? Does this proposal forces applications to choose the "right" network? Currently, MPA or ULP and not applications handle it. Why would we want to change that? Sean, I may be beating the dead horse, but I recall that one of the main selling points of RDMA that it magical bust to performance with no changes applications. Just plug it in an viola, performances goes up and CPU utilization for network stack goes does. Win-Win. Thanks, Arkady Kanevsky email: arkady@netapp.com Network Appliance Inc. phone: 781-768-5395 1601 Trapelo Rd. - Suite 16. Fax: 781-895-1195 Waltham, MA 02451 central phone: 781-768-5300 > -----Original Message----- > From: Sean Hefty [mailto:mshefty@ichips.intel.com] > Sent: Friday, September 28, 2007 5:35 PM > To: Kanevsky, Arkady > Cc: netdev@vger.kernel.org; rdreier@cisco.com; > linux-kernel@vger.kernel.org; general@lists.openfabrics.org > Subject: Re: [ofa-general] [PATCH v3] iw_cxgb3: > Support"iwarp-only"interfacestoavoid 4-tuple conflicts. > > Kanevsky, Arkady wrote: > > Exactly, > > it forces the burden on administrator. > > And one will be forced to try one mount for iWARP and it > does not work > > issue another one TCP or UDP if it fails. > > Yack! > > > > And server will need to listen on different IP address and simple > > * will not work since it will need to listen in two > different domains. > > The server already has to call listen twice. Once for the > rdma_cm and once for sockets. Similarly on the client side, > connect must be made over rdma_cm or sockets. I really don't > see any impact on the application for this approach. > > We just end up separating the port space based on networking > addresses, rather than keeping the problem at the transport > level. If you have an alternate approach that will be > accepted upstream, feel free to post it. > > - Sean > _______________________________________________ > general mailing list > general@lists.openfabrics.org > http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general > > To unsubscribe, please visit > http://openib.org/mailman/listinfo/openib-general > - 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/