A new stable release of MPICH, 3.4.2, is now available for download. This is the second bug-fix release in the 3.4.x series. This release contains fixes for GPU support and other user-reported bugs and build issues. You can find the release on our downloads page (https://www.mpich.org/downloads/). Production environments are encouraged to upgrade to this release. Regards, The MPICH team =============================================================================== Changes in 3.4.2 =============================================================================== # Update configure options to support --disable-ze and --disable-cuda to explicitly disable GPU-awareness # Update embedded hwloc to version 2.4.1. Fixes a build issue on systems with OpenCL. # Fixes for Argobots thread package support. # Fixes for the DAOS ROMIO driver (thanks to Intel for contributing) # Fix additional bugs in GPU-aware nonblocking op collectives # Fix 'make check' errors with embedded MPL and json-c libraries # Fix support for GNI provider in ch4:ofi netmod # Fix bug in dynamic window memory registration with ch4:ofi netmod # Fix bug in persistent pt2pt when used with MPI_PROC_NULL # Fix bug in hydra nameserver when freeing published entries # Fix bugs in GPFS ROMIO driver (thanks to IBM for contributing) # Fix bug in darray type creation (thanks to IBM for contributing) # Fix bugs in XPMEM support # Fix bug in MPI_Comm_spawn_multiple where non-root args were not ignored A full list of changes is available at the following link: https://github.com/pmodels/mpich/compare/v3.4.1…v3.4.2