I am a novice user and have this exact problem on a cluster. How do I apply
the patch?
Thanks.
Jonathan.
On 26/03/2014, at 1:24 AM, <[email protected]> wrote:
> After some digging, it seems that segfaults observed on OFED/InfiniBand
> clusters (see [1], [2], [3]) are caused by implementation of
>
> subprocess.Popen
>
> Check your local subprocess.py:_execute_child. Parent does not seem to
> keep hands of memory between fork() and exec() (as required [4], [5]),
> especially as it is fiddling with garbage collector.
>
> I tried switching to os.system (posix implementation in [6]) instead of
> subprocess.Popen and it seems promising. Check out [7] or enclosed
> patch.
>
> Jan
>
> [1] https://answers.launchpad.net/dolfin/+question/219270
> [2] https://answers.launchpad.net/dolfin/+question/225946
> [3] http://fenicsproject.org/pipermail/fenics/2013-June/000398.html
> [4] https://www.open-mpi.org/faq/?category=openfabrics#ofa-fork
> [5]
> http://www.openfabrics.org/downloads/OFED/release_notes/OFED_3.12_rc1_release_notes#3.03
> [6] http://svn.python.org/projects/python/trunk/Modules/posixmodule.c
> [7] https://bitbucket.org/blechta/instant/branch/blechta/ofed-fork
>
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