From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steve Wise Subject: Re: [ewg] [PATCH] [for-2.6.33] rdma/cm: disallow loopback address for iwarp devices Date: Mon, 08 Feb 2010 15:16:29 -0600 Message-ID: <4B707F2D.3030508@opengridcomputing.com> References: <58D723FE08DC6A4398E6596E38F3FA170566DA@XMB-RCD-205.cisco.com> <0D5487526204477AA2ABED06E46768E2@amr.corp.intel.com> <4B6C498F.3060708@opengridcomputing.com> <38B735478FE94F40BBA3E8BFD794B10F@amr.corp.intel.com> <4B6D9948.6040007@opengridcomputing.com> <79BAA34231304F1E84C5A5A53C50A207@amr.corp.intel.com> <4B6FFB1B.40905@mellanox.co.il> <4B701FE6.60302@opengridcomputing.com> <20100208191927.GU16490@obsidianresearch.com> <4B706DED.9080403@opengridcomputing.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Sean Hefty Cc: Jason Gunthorpe , Roland Dreier , tziporet-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, ewg-G2znmakfqn7U1rindQTSdQ@public.gmane.org, Jeff Squyres List-Id: linux-rdma@vger.kernel.org Sean Hefty wrote: >> IMO 127.0.0.1 should be for SW loopback, not HW RDMA loopback. >> > > I disagree, but what does it matter? So, we add a 'software' loopback that uses > 127.0.0.1. Openmpi still wouldn't work. > > I guess that's true. >> I will commit to get the fix in openmpi asap. >> > > If we don't care if the fix is in the kernel or user space, then we could add an > a 'disable-loopback-support' build option to librdmacm, which can fail any > attempt to bind to a loopback address. > > I'd rather see it removed from 2.6.33 kernel before it shipts, and then we fix openmpi, and then re-submit 127.0.0.1 support once openmpi publishes a release with its fix. See my other email that submits a potential commit to remove 127.0.0.1 support for 2.6.33. Steve. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html