[knem-devel] Can't modprobe KNEM

Brice Goglin Brice.Goglin at inria.fr
Fri Jan 20 13:59:17 CET 2017


Looks like your knem module was not properly built for that kernel. If
it comes from MOFED, you should report the issue to Mellanox.

You may try to ask dkms to rebuild the MOFED knem module (assuming the
sources are still available on your system). I don't remember how to do

In the meantime, you may rebuild your own knem by downloading the
tarball from http://knem.gforge.inria.fr/download/ and following the doc
at http://knem.gforge.inria.fr/doc/


Le 20/01/2017 13:45, Juan A. Cordero Varelaq a écrit :
> Hi,
> I have inherited an SGE cluster with Mellanox OFED software installed:
>   *  /opt/knem-1.1.90mlnx2
>   * /opt/mellanox/mxm
>   * /opt/mellanox/fca
> After having installed OpenMPI-2.0.1 I've got lots of warnings related
> to KNEM. Then, from the OMPI mailing list, I've been told  I should
> first load the knem module, since /dev/knem does not exist yet.
> However, when I runmodprobe knem (with root user), I get the following:
>     FATAL: Error inserting knem
>     (/lib/modules/3.13.0-37-generic/updates/dkms/knem.ko): Invalid
>     module format
> After reading the knem documentation, I've tried:
>     /opt/knem-1.1.90mlnx2/sbin/knem_local_install
> and got:
>     Installing module...
>       Installing module /lib/modules/3.13.0-37-generic/extra//knem.ko...
>     cp: cannot stat
>     `/opt/knem-1.1.90mlnx2/lib/modules/3.13.0-37-generic/knem.ko': No
>     such file or directory
> I would appreciate a lot any hint on this issue.
> Thanks a lot in advance
> _______________________________________________
> knem-devel mailing list
> knem-devel at lists.gforge.inria.fr
> http://lists.gforge.inria.fr/mailman/listinfo/knem-devel

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