binNMUs for switch in MPI implementations (mpi-defaults)

[Riku Voipio]

Manuel Prinz wrote:
> One big step in this effort is to change the mpi-defaults package to no
> longer use LAM/MPI. We (as in: debian-science) agreed to use MPICH2 on
> the architectures were Open MPI does not build currently.
Is there some work ongoing to make Open MPI more portable
or add the atomic asm instructions for more archs?