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
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:
Give it a whirl and tell me what you think.