[CMake] Problem writing on GPFS.

[Samuel Trahan - NOAA Affiliate]

Does anyone know of a workaround for this which does not require upgrading
GPFS or changing compilers?

On Tue, Feb 10, 2015 at 2:24 PM, P. A. Cheeseman <aai at purdue.edu> wrote:

>      I want to thank Rolf here for his advice because I failed to
> do so in an off line reply.
>
>      Shortly after I replied to Rolf's note, I received notification from
> IBM that the problem is related to our version of GPFS (4.1.0-2).
>
>      Versions 4.1.0-3 and later apparently do not have the problem.
>
>                                 Best regards,
>                                 Phil
>
>                                 P. A. Cheeseman
>                                 aai at purdue.edu
>                                 765.496.8224
>
>
> > -----Original Message-----
> > From: Rolf Eike Beer [mailto:eike at sf-mail.de]
> > Sent: Tuesday, February 10, 2015 13:44
> > To: cmake at cmake.org; aai at purdue.edu
> > Subject: Re: [CMake] Problem writing on GPFS.
> >
> > P. A. Cheeseman wrote:
> > >      System: RHEL6   (2.6.32-504.8.1.el6.x86_64)
> > >      Hardware: Various cluster nodes.
> >
> > >      A C code with explicit writev() calls, with a NULL pointer in the
> > > first iovec entry, also reproduces the behavior.  When the NULL is
> > > part of any entry other than the first, the code runs identically for
> > > all storage.
> >
> > I would suggest contacting Red Hat. This sounds for me like a bug in the
> GPFS
> > code, especially since the call succeeds if the (NULL, 0) pair is in a
> later pair.
> >
> > Other than that, I don't see a reason why g++ should emit such a call.
> Should
> > probably be reported to the gcc guys. Or maybe this is just something in
> your
> > libc, so gcc isn't at fault at all. Probably time for the Red Hat guys to
> > investigate, too ;)
> >
> > Eike
> > --
>
> --
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