[openfabrics-ewg] Re: [openib-general] OpenSM segmentation fault on RC5
Don.Albert at Bull.com
Don.Albert at Bull.com
Tue May 30 07:55:34 PDT 2006
Hal,
With your patch to OpenSM, I think everything is ok on the local node. The
remote node is definitely having some problems, resulting in not
responding to the MAD packets. I have entered a separate message on the
problems with the "ib0" interface on that machine.
>
> On Fri, 2006-05-26 at 20:59, Hal Rosenstock wrote:
> > > What next, coach?
> >
> > Can you turn on madeye on the remote node and see what packets are
> > received and sent ? Let me know if you need help with that. I think
you
> > said you were running OFED, right ?
>
Yes, I am running kernel 2.6.16 with the OFED RC5 release. I will
investigate how to run madeye, but the hangs on the remote machine are
probably the root cause of the link failure.
> I don't think madeye is part of OFED :-( Can it get added for RC6,
> Tziporet ? I think it would be a useful tool to add for problems like
> this.
>
> Also, was this a working setup before ? Did anything else change besides
> installing RC5 on both nodes ?
>
This back to back setup was working originally with a backported 2.6.11-34
kernel and I believe it was revision 6500 from the OpenIB svn trunk at
that time. The problems started when I tried to move to RC4 and now RC5
of the OFED release, with the 2.6.16 kernel.
> I have two more experiments I'd like you to try, before we go down the
> madeye "route":
>
> 1. Do you have another IB cable to try ?
>
> 2. Can you completely shutdown and repower the remote node and see if it
> starts responding ?
>
It is difficult for me to debug this sort of thing, since I telecommute
from Tucson and the machines are located in Phoenix. But I can get
someone there to power the machine down and reboot.
-Don Albert-
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