Re: bug 1918 - openmpi broken due to rdma-cm changes

Jeff Squyres
2010-02-05T20:08:10Z

On Feb 5, 2010, at 1:56 PM, Jason Gunthorpe wrote:

> > I think we should remove the feature of allowing binds to 127.0.0.1
> > altogether based on Jeff's arguments and my assertion that 127.0.0.1 is
> > a sw-loopback mechanism anyway...
>
> I don't agree, the kernel should be free to provide a loop back
> service any way it likes, and if that means using one of the HW

Ok, fine. Should we push back OFED 1.5.1 until Open MPI can get 1.4.2 out? I don't know when that will be.

In short: you're breaking backward compatibility with zero warning. There is real software out there that will break if people upgrade their kernel/OFED/RDMA CM/whatever (e.g., Open MPI). Isn't this supposed to be the Enterprise distribution (meaning: stability)? (trying to keep the frustration out of my voice...)

This is a terrible, terrible idea.

How about this: back out the change for now. Give everyone time to upgrade. If nothing else, ***give those of us who are involved in this community*** time to upgrade. Then put the feature back in after adequate time has passed.

--
Jeff Squyres <jsquyres-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>
Cisco.com - http://www.cisco.com

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