From: "Sean Hefty" <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
To: 'Steve Wise' <swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
Cc: linux-rdma <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
OpenFabrics EWG <ewg-G2znmakfqn7U1rindQTSdQ@public.gmane.org>,
Jeff Squyres <jsquyres-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
Subject: RE: bug 1918 - openmpi broken due to rdma-cm changes
Date: Thu, 4 Feb 2010 14:54:40 -0800 [thread overview]
Message-ID: <DB361897EE7C40C5AB494AAC2D8625AC@amr.corp.intel.com> (raw)
In-Reply-To: <4B6B4EFE.3010205-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
>Well then the rdma-cm needs to know which devices support hw loopback.
>Cuz on a T3-only system, no hwloop...
The problem sounds like it's more than just whether 127.0.0.1 is usable. That
check may fix openmpi, but it sounds more like the app needs to know whether the
device can actually support loopback, regardless of what addresses are used. Is
this correct?
What would openmpi do if there were two addresses assigned to the T3 device?
Does openmpi simply bypass RDMA for all connections on the local machine?
Basically, I'm not sure that this is *just* an rdma_cm issue. Although it
definitely appears that some sort of change needs to be made to the rdma_cm.
- Sean
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next prev parent reply other threads:[~2010-02-04 22:54 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4B6B47D0.9030507@aoot.com>
[not found] ` <4B6B47D0.9030507-10udUCx4aRo@public.gmane.org>
2010-02-04 22:33 ` bug 1918 - openmpi broken due to rdma-cm changes Sean Hefty
[not found] ` <DE586AB7003E4FC4B3850004A0B3CAF6-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-04 22:39 ` Steve Wise
[not found] ` <4B6B4C9B.8070804-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-04 22:42 ` Sean Hefty
[not found] ` <EEF75E01C32544C688989E66FECDC422-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-04 22:49 ` Steve Wise
[not found] ` <4B6B4EFE.3010205-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-04 22:54 ` Sean Hefty [this message]
[not found] ` <DB361897EE7C40C5AB494AAC2D8625AC-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-04 23:04 ` Steve Wise
[not found] ` <4B6B5277.80307-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-04 23:35 ` Roland Dreier
[not found] ` <aday6j8efqs.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-02-04 23:44 ` Steve Wise
[not found] ` <4B6B5BD7.9090301-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-04 23:50 ` Roland Dreier
[not found] ` <adatytwef1i.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-02-05 0:03 ` Paul Grun
2010-02-04 22:55 ` Steve Wise
[not found] ` <4B6B5048.5020707-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2010-02-04 22:56 ` Sean Hefty
2010-02-05 11:32 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
2010-02-05 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
2010-02-07 11:56 ` [ewg] " Tziporet Koren
2010-02-07 16:39 ` Steve Wise
2010-02-07 16:48 ` Roland Dreier
[not found] ` <ada4oltxa8j.fsf-BjVyx320WGW9gfZ95n9DRSW4+XlvGpQz@public.gmane.org>
2010-02-07 17:42 ` Steve Wise
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