Per request from Gilles and discussion at devel conference, have the --oversubscribe option automatically set both oversubscribe and overload-allowed properties as this is likely what the user intended.

cmr=v1.8.2:reviewer=rhc:subject=automatically set oversub/load

This commit was SVN r32072.

orte/mca/rmaps/base/rmaps_base_frame.c

@@ -183,7 +183,7 @@ static int orte_rmaps_base_register(mca_base_register_flag_t flags)
 
     rmaps_base_oversubscribe = false;
     (void) mca_base_var_register("orte", "rmaps", "base", "oversubscribe",
-                                 "If true, then allow oversubscription of nodes",
+                                 "If true, then allow oversubscription of nodes and overloading of processing elements",
                                  MCA_BASE_VAR_TYPE_BOOL, NULL, 0, 0,
                                  OPAL_INFO_LVL_9,
                                  MCA_BASE_VAR_SCOPE_READONLY, &rmaps_base_oversubscribe);
@@ -515,6 +515,8 @@ static int orte_rmaps_base_open(mca_base_open_flag_t flags)
         }
         ORTE_UNSET_MAPPING_DIRECTIVE(orte_rmaps_base.mapping, ORTE_MAPPING_NO_OVERSUBSCRIBE);
         ORTE_SET_MAPPING_DIRECTIVE(orte_rmaps_base.mapping, ORTE_MAPPING_SUBSCRIBE_GIVEN);
+        /* also set the overload allowed flag */
+        opal_hwloc_binding_policy |= OPAL_BIND_ALLOW_OVERLOAD;
     }
 
     /* should we display a detailed (developer-quality) version of the map after determining it? */

orte/tools/orterun/orterun.c

@@ -332,7 +332,7 @@ static opal_cmd_line_init_t cmd_line_init[] = {
       "Nodes are not to be oversubscribed, even if the system supports such operation"},
     { "rmaps_base_oversubscribe", '\0', "oversubscribe", "oversubscribe", 0,
       NULL, OPAL_CMD_LINE_TYPE_BOOL,
-      "Nodes are allowed to be oversubscribed, even on a managed system"},
+      "Nodes are allowed to be oversubscribed, even on a managed system, and overloading of processing elements"},
     { "rmaps_base_cpus_per_rank", '\0', "cpus-per-proc", "cpus-per-proc", 1,
       NULL, OPAL_CMD_LINE_TYPE_INT,
       "Number of cpus to use for each process [default=1]" },