Sorry to rain on the parade, but SGI UV is still broken by default.
I reported this as present in 1.8.4rc5 and Nathan had claimed to be working
on it.

A reminder that all it takes is a 1-line change in
ompi/mca/btl/vader/configure.m4 to not search for sn/xpmem.h

-Paul

On Fri, Dec 19, 2014 at 7:26 PM, Ralph Castain <r...@open-mpi.org> wrote:

> The Open MPI Team, representing a consortium of research, academic, and
> industry partners, is pleased to announce the release of Open MPI version
> 1.8.4.
>
> v1.8.4 is a bug fix release.  All users are encouraged to upgrade to
> v1.8.4 when possible.
>
> Version 1.8.4 can be downloaded from the main Open MPI web site or any of
> its mirrors  (mirrors will be updating shortly).
>
> Here is a list of changes in v1.8.4 as compared to v1.8.3:
>
> - Fix MPI_SIZEOF; now available in mpif.h for modern Fortran compilers
>   (see README for more details).  Also fixed various compiler/linker
>   errors.
> - Fixed inadvertant Fortran ABI break between v1.8.1 and v1.8.2 in the
>   mpi interface module when compiled with gfortran >= v4.9.
> - Fix various MPI_THREAD_MULTIPLE issues in the TCP BTL.
> - mpirun no longer requires the --hetero-nodes switch; it will
>   automatically detect when running in heterogeneous scenarios.
> - Update LSF support, to include revamped affinity functionality.
> - Update embedded hwloc to v1.9.1.
> - Fixed max registerable memory computation in the openib BTL.
> - Updated error message when debuggers are unable to find various
>   symbols/types to be more clear.  Thanks to Dave Love for raising the
>   issue.
> - Added proper support for LSF and PBS/Torque libraries in static builds.
> - Rankfiles now support physical processor IDs.
> - Fixed potential hang in MPI_ABORT.
> - Fixed problems with the PSM MTL and "re-connect" scenarios, such as
>   MPI_INTERCOMM_CREATE.
> - Fix MPI_IREDUCE_SCATTER with a single process.
> - Fix (rare) race condition in stdout/stderr funneling to mpirun where
>   some trailing output could get lost when a process terminated.
> - Removed inadvertent change that set --enable-mpi-thread-multiple "on"
>   by default, thus impacting performance for non-threaded apps.
> - Significantly reduced startup time by optimizing internal hash table
>   implementation.
> - Fixed OS X linking with the Fortran mpi module when used with
>   gfortran >= 4.9.  Thanks to Github user yafshar for raising the
>   issue.
> - Fixed memory leak on Cygwin platforms.  Thanks for Marco Atzeri for
>   reporting the issue.
> - Fixed seg fault in neighborhood collectives when the degree of the
>   topology is higher than the communicator size.  Thanks to Lisandro
>   Dalcin for reporting the issue.
> - Fixed segfault in neighborhood collectives under certain use-cases.
> - Fixed various issues regarding Solaris support.  Thanks to Siegmar
>   Gross for patiently identifying all the issues.
> - Fixed PMI configure tests for certain Slurm installation patterns.
> - Fixed param registration issue in Java bindings.  Thanks to Takahiro
>   Kawashima and Siegmar Gross for identifying the issue.
> - Several man page fixes.
> - Silence several warnings and close some memory leaks (more remain,
>   but it's better than it was).
> - Re-enabled the use of CMA and knem in the shared memory BTL.
> - Updated mpirun manpage to correctly explain new map/rank/binding options.
> - Fixed MPI_IALLGATHER problem with intercommunicators.  Thanks for
>   Takahiro Kawashima for the patch.
> - Numerous updates and performance improvements to OpenSHMEM.
> - Turned off message coalescing in the openib BTL until a proper fix
>   for that capability can be provided (tentatively expected for 1.8.5)
> - Fix a bug in iof output that dates back to the dinosaurs which would
>   output extra bytes if the system was very heavily loaded
> - Fix a bug where specifying mca_component_show_load_errors=0 could
>   cause ompi_info to segfault
> - Updated valgrind suppression file
>
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-- 
Paul H. Hargrove                          phhargr...@lbl.gov
Computer Languages & Systems Software (CLaSS) Group
Computer Science Department               Tel: +1-510-495-2352
Lawrence Berkeley National Laboratory     Fax: +1-510-486-6900

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