From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: Jeff Squyres <jsquyres-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
Cc: Steve Wise
<swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>,
Sean Hefty <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"Roland Dreier (rdreier)"
<rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>,
Tziporet Koren
<tziporet-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>,
Linux RDMA List
<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
ewg-G2znmakfqn7U1rindQTSdQ@public.gmane.org
Subject: Re: [ewg] rdma/cm: disallow loopback address for iwarp devices
Date: Mon, 8 Feb 2010 15:09:03 -0700 [thread overview]
Message-ID: <20100208220903.GW16490@obsidianresearch.com> (raw)
In-Reply-To: <41CC15C4-0200-4C9E-9E10-3D2A9B76D16B-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
On Mon, Feb 08, 2010 at 04:56:23PM -0500, Jeff Squyres wrote:
> DESCRIPTION
> Associates a source address with an rdma_cm_id. The address may be
> wildcarded. If binding to a specific local address, the rdma_cm_id
> will also be bound to a local RDMA device.
> What RDMA device is bound to when you use 127.0.0.1? I'm not 100%
> sure, but I think that this might be where we got the rationale that
> we didn't need additional LOOPBACK tests in OMPI... (if anyone else
> agrees with this interpretation, then it's at least one argument
> that allowing binding to LOOPBACK devices *is* a change in
> semantics, and therefore should be treated extremely carefully)
This statement is trying to say that if a source address is given then
the rdma_cm_id will be bound to a device. Designating which APIs bind
the device is important for the API user, once the device is bound you
can allocate resource against it.
It doesn't matter which device is picked, that is up to the kernel.
For instance if the the same IP is assigned to multiple RDMA devices
then the kernel will pick one.
Jason
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next prev parent reply other threads:[~2010-02-08 22:09 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-05 11:32 bug 1918 - openmpi broken due to rdma-cm changes Jeff Squyres (jsquyres)
[not found] ` <58D723FE08DC6A4398E6596E38F3FA170566DA-2KNrN6/GZtCAsgjym8flbKBKnGwkPULj@public.gmane.org>
2010-02-05 16:16 ` Steve Wise
[not found] ` <4B6C4460.3050908-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-05 16:45 ` Steve Wise
2010-02-05 17:51 ` Roland Dreier
[not found] ` <ada4olvefl4.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-02-05 17:58 ` Jeff Squyres
[not found] ` <324EFA68-12F6-46E9-B876-7F4847B53224-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-02-05 18:32 ` Steve Wise
[not found] ` <4B6C6453.9090706-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-05 18:49 ` Roland Dreier
2010-02-05 18:56 ` Jason Gunthorpe
[not found] ` <20100205185616.GS16490-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-02-05 20:08 ` Jeff Squyres
[not found] ` <E8FF8BD1-80AC-4AA7-BC2A-CE7547FB9ABA-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-02-05 21:14 ` Jason Gunthorpe
[not found] ` <20100205211455.GT16490-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-02-05 21:40 ` Jeff Squyres
[not found] ` <697C6107-13A9-48E3-B451-02529305100D-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-02-05 21:53 ` Steve Wise
[not found] ` <4B6C9369.1070208-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-05 22:15 ` Sean Hefty
[not found] ` <77E29960440B4806B112A7158F4FA1C4-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-05 22:21 ` Steve Wise
2010-02-06 16:18 ` Steve Wise
2010-02-05 22:20 ` Jeff Squyres
2010-02-06 0:54 ` Roland Dreier
2010-02-05 18:42 ` Sean Hefty
[not found] ` <3762D25FD9474444A4B3E2240EFB8D0E-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-05 19:01 ` Steve Wise
[not found] ` <4B6C6B23.4010704-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-05 19:24 ` Roland Dreier
2010-02-05 17:57 ` Jeff Squyres
2010-02-05 16:22 ` Sean Hefty
[not found] ` <0D5487526204477AA2ABED06E46768E2-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-05 16:38 ` Steve Wise
[not found] ` <4B6C498F.3060708-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-05 16:52 ` Sean Hefty
[not found] ` <F6DF49B759AD49EEB44BECD99FE26DCF-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-05 17:08 ` Steve Wise
2010-02-07 21:44 ` [ewg] " Tziporet Koren
[not found] ` <4B6F3451.2070304-VPRAkNaXOzVS1MOuV/RT9w@public.gmane.org>
2010-02-08 5:38 ` Steve Wise
2010-02-05 20:09 ` Sean Hefty
[not found] ` <38B735478FE94F40BBA3E8BFD794B10F-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-06 16:31 ` Steve Wise
[not found] ` <4B6D9948.6040007-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-06 16:45 ` Steve Wise
2010-02-07 0:12 ` Sean Hefty
[not found] ` <B41CA82E76BB439B892B4874D38EA652-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-07 1:22 ` Steve Wise
[not found] ` <4B6E15C4.9020703-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-07 11:56 ` [ewg] " Tziporet Koren
[not found] ` <4B6EAA5F.1000208-VPRAkNaXOzVS1MOuV/RT9w@public.gmane.org>
2010-02-07 16:39 ` Steve Wise
[not found] ` <4B6EECBE.6020509-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-07 16:48 ` Roland Dreier
[not found] ` <ada4oltxa8j.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-02-07 17:42 ` Steve Wise
2010-02-08 5:27 ` [ewg] " Sean Hefty
2010-02-08 11:52 ` Tziporet Koren
[not found] ` <4B6FFB07.1070701-VPRAkNaXOzVS1MOuV/RT9w@public.gmane.org>
2010-02-08 14:29 ` Steve Wise
2010-02-08 6:02 ` [PATCH] [for-2.6.33] rdma/cm: disallow loopback address for iwarp devices Sean Hefty
[not found] ` <79BAA34231304F1E84C5A5A53C50A207-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-08 11:52 ` [ewg] " Tziporet Koren
[not found] ` <4B6FFB1B.40905-VPRAkNaXOzVS1MOuV/RT9w@public.gmane.org>
2010-02-08 14:29 ` Steve Wise
[not found] ` <4B701FE6.60302-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-08 16:52 ` [ewg] " Roland Dreier
[not found] ` <adawrynwtz9.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-02-08 19:19 ` Jason Gunthorpe
[not found] ` <20100208191927.GU16490-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-02-08 20:02 ` Steve Wise
[not found] ` <4B706DED.9080403-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-08 20:33 ` Sean Hefty
[not found] ` <C8A2C57AD5FA4141860DBFF60BFDE2DC-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-08 21:16 ` Steve Wise
[not found] ` <4B707F2D.3030508-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-08 21:56 ` [ewg] " Jeff Squyres
[not found] ` <41CC15C4-0200-4C9E-9E10-3D2A9B76D16B-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-02-08 22:09 ` Jason Gunthorpe [this message]
[not found] ` <20100208220903.GW16490-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2010-02-08 22:11 ` Jeff Squyres
2010-02-08 22:13 ` Sean Hefty
[not found] ` <7CC17592BE414EFCA00A1CB6033D047A-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-08 22:17 ` [ewg] " Jeff Squyres
[not found] ` <44864D85-03D1-412E-906C-D6FF9 04157C8@cisco.com>
[not found] ` <44864D85-03D1-412E-906C-D6FF904157C8-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-02-08 22:26 ` Sean Hefty
[not found] ` <F533284C543140B0994C54C83C4AFF2B-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-08 22:28 ` Steve Wise
[not found] ` <4B709008.9020902-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-08 23:48 ` Sean Hefty
[not found] ` <1966FBDAD40C4EAC8611372D2B15AE84-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-09 0:28 ` Jeff Squyres
2010-02-09 0:30 ` Pradeep Satyanarayana
[not found] ` <4B70ACB6.5070008-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2010-02-09 0:45 ` Jeff Squyres
[not found] ` <FE273021-D385-45EE-9376-6479A92211AF-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-02-09 0:50 ` Pradeep Satyanarayana
[not found] ` <4B70B152.4080308-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2010-02-09 1:02 ` Jeff Squyres
2010-02-09 0:41 ` [PATCH] [for-2.6.33] rdma/cm: revert associating an RDMA device when binding to loopback Sean Hefty
[not found] ` <421D3D6710E847C5B7CAC00EB73117C4-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-09 15:29 ` Steve Wise
[not found] ` <4B717F5D.8020403-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-09 16:15 ` Pradeep Satyanarayana
[not found] ` <4B718A2C.2030602-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2010-02-09 16:18 ` Steve Wise
[not found] ` <4B718ADB.5020602-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-09 16:23 ` Sean Hefty
2010-02-09 22:01 ` Jeff Squyres
[not found] ` <4FA7F42E-308A-4A4D-82D8-87794CB8C4DE-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
2010-02-09 22:17 ` [ewg] " Jason Gunthorpe
2010-02-09 22:20 ` Sean Hefty
2010-02-10 18:10 ` [PATCH] [for-2.6.33] " Roland Dreier
[not found] ` <ada6365hsgm.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-02-10 18:18 ` Steve Wise
2010-02-10 19:13 ` Sean Hefty
2010-02-09 16:32 ` [PATCH] [for-2.6.33] rdma/cm: disallow loopback address for iwarp devices Sean Hefty
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