Follow on to SVN trunk r30850: consolidate the ibv_create_ah() calls
into a single loop, MPI_WAITALL-style. That is, call the (effectively
non-blocking) ibv_create_ah() for each endpoint. If we get
NULL+EAGAIN, it means that the UDP ARP is still ongoing down in the
kernel, so just try again later. We put these all into a single loop
because it allows us to parallelize the ARP progress in the kernel.
cmr=v1.7.5:ticket=trac:4253
This commit was SVN r30852.
The following SVN revision numbers were found above:
r30850 --> open-mpi/ompi@3641500442
The following Trac tickets were found above:
Ticket 4253 --> https://svn.open-mpi.org/trac/ompi/ticket/4253
4e282a3295