Just as an internal information for ourselves: mvapich and mvapich2 heavily depend on the underlaying Infiniband stack. Therefore, both MPI libraries had to be recompiled while changing from Voltaire IBHOST-3.4.5 stack to GridStack 4.1.5 (aka OFED-1.1).

As mvapich/mvapich2 are statically linked into executables, probably those applications have to be recompiled, too.
On the other side, Intel-MPI (which is the default on woody) is not affected, thus, most of the users’ applications will not require recompilation.

The RRZE versions of mvapich-0.9.8 and mvapich2-0.9.8 were now compiled using:

module load intel64-c/9.1.049, intel64-f/9.1.045
export CC=icc
export CXX=icpc
export F77=ifort
export F90=ifort
export ARCH=_EM64T_
export OPEN_IB_HOME=/usr/local/ofed
export PREFIX=/apps/mvapich2/0.9.8-gridstack-4.1.5
./make.mvapich[2].gen2