WHAT: Fix the bus error caused by an inadequate amount of space during opal_shmem_segment_create by testing whether or not the target mount has enough space to accommodate the shared-memory backing store. I admit that this isn't an ideal solution, but I can't figure out another way to test this sort of thing given the way ftruncate and mmap behave.
WHY: Provide a nice error message instead of a bus error. See: https://svn.open-mpi.org/trac/ompi/ticket/2827 WHERE: opal/util/path.[ch] opal/mca/shmem/mmap/shmem_mmap_module.c WHEN: Sometime next week, if everything is okay. Please test, because the following branch has only been tested on Linux and OS X. Code can be found: https://bitbucket.org/samuelkgutierrez/opaldf Give it a whirl and tell me what you think. Thanks, Sam
