Per #1352, most iWARP adapters today cannot handle connections between

two processes on the same server (!).  So for today, we'll simply mark
all local processes that use iWARP adapters as "unreachable".

More details in #1352.

This commit was SVN r18699.

ompi/mca/btl/openib/btl_openib.c

@@ -318,6 +318,17 @@ int mca_btl_openib_add_procs(
         int remote_matching_port;
 
         opal_output(-1, "add procs: adding proc %d", i);
+
+        /* Most current iWARP adapters (June 2008) cannot handle
+           talking to other processes on the same host (!) -- so mark
+           them as unreachable (need to use sm).  So for the moment,
+           we'll just mark any local peer on an iWARP NIC as
+           unreachable.  See trac ticket #1352. */
+        if (IBV_TRANSPORT_IWARP == openib_btl->hca->ib_dev->transport_type &&
+            0 != (ompi_proc->proc_flags && OMPI_PROC_FLAG_LOCAL)) {
+            continue;
+        }
+
         if(NULL == (ib_proc = mca_btl_openib_proc_create(ompi_proc))) {
             return OMPI_ERR_OUT_OF_RESOURCE;
         }