ibv_create_ah() may need to effect an ARP resolution, which may take
some time. Rather than blocking in ibv_create_ah(), the usNIC driver
may return NULL and set errno to EAGAIN indicating that we should try
again (i.e., the ARP resolution is proceeding under the covers).
So add a simple loop here to loop over ibv_create_ah() until it
returns non-(NULL+EAGAIN). A future commit will make this a bit more
efficient.
Authored-by: Jeff Squyres <jsquyres@cisco.com>
Reviewed-by: Dave Goodell <dgoodell@cisco.com>
cmr=v1.7.5:ticket=trac:4253
This commit was SVN r30850.
The following Trac tickets were found above:
Ticket 4253 --> https://svn.open-mpi.org/trac/ompi/ticket/4253
3641500442