The Open MPI Team, representing a consortium of research, academic, and
industry partners, is pleased to announce the release of Open MPI version 2.1.1.

v2.1.1 is a bug fix release that includes a variety of bug fixes and some
performance fixes.  All users are encouraged to upgrade to v2.1.1 when

Version 2.1.1 can be downloaded from the main Open MPI web site:


2.1.1 -- April, 2017


Bug fixes/minor improvements:

- Fix a problem with one of Open MPI's fifo data structures which led to

  hangs in a make check test.  Thanks to Nicolas Morey-Chaisemartin for


- Add missing MPI_AINT_ADD/MPI_AINT_DIFF function definitions to mpif.h.

  Thanks to Aboorva Devarajan for reporting.

- Fix the error return from MPI_WIN_LOCK when rank argument is invalid.

  Thanks to Jeff Hammond for reporting and fixing this issue.

- Fix a problem with mpirun/orterun when started under a debugger. Thanks

  to Gregory Leff for reporting.

- Add configury option to disable use of CMA by the vader BTL.  Thanks

  to Sascha Hunold for reporting.

- Add configury check for MPI_DOUBLE_COMPLEX datatype support.

  Thanks to Alexander Klein for reporting.

- Fix memory allocated by MPI_WIN_ALLOCATE_SHARED to

  be 64 byte aligned.  Thanks to Joseph Schuchart for


- Update MPI_WTICK man page to reflect possibly higher

  resolution than 10e-6.  Thanks to Mark Dixon for


- Add missing MPI_T_PVAR_SESSION_NULL definition to mpi.h

  include file.  Thanks to Omri Mor for this contribution.

- Enhance the Open MPI spec file to install modulefile in /opt

  if installed in a non-default location.  Thanks to Kevin

  Buckley for reporting and supplying a fix.

- Fix a problem with conflicting PMI symbols when linking statically.

  Thanks to Kilian Cavalotti for reporting.

Known issues (to be addressed in v2.1.2):

- See the list of fixes slated for v2.1.2 here:

Howard Pritchard
Los Alamos National Laboratory

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