osc/sm: Add MCA parameter to set priority

For some reason, the SM OSC component was one of the few components
which did not have an MCA parameter to set priority.  This patch
fixes that.

Signed-off-by: Brian Barrett <[email protected]>

Author: bwbarrett

ompi/mca/osc/sm/osc_sm.h

@@ -53,6 +53,9 @@ typedef struct ompi_osc_sm_node_state_t ompi_osc_sm_node_state_t;
 struct ompi_osc_sm_component_t {
     ompi_osc_base_component_t super;
 
+    /** Priority of the osc/sm component */
+    unsigned int priority;
+
     char *backing_directory;
 };
 typedef struct ompi_osc_sm_component_t ompi_osc_sm_component_t;

ompi/mca/osc/sm/osc_sm_component.c

@@ -115,6 +115,8 @@ ompi_osc_sm_module_t ompi_osc_sm_module_template = {
 
 static int component_register (void)
 {
+    char *description_str;
+
     if (0 == access ("/dev/shm", W_OK)) {
         mca_osc_sm_component.backing_directory = "/dev/shm";
     } else {
@@ -128,6 +130,16 @@ static int component_register (void)
                                             MCA_BASE_VAR_TYPE_STRING, NULL, 0, 0, OPAL_INFO_LVL_3,
                                             MCA_BASE_VAR_SCOPE_READONLY, &mca_osc_sm_component.backing_directory);
 
+    mca_osc_sm_component.priority = 100;
+    opal_asprintf(&description_str, "Priority of the osc/sm component (default: %d)",
+                  mca_osc_sm_component.priority);
+    (void)mca_base_component_var_register(&mca_osc_sm_component.super.osc_version,
+                                          "priority", description_str,
+                                          MCA_BASE_VAR_TYPE_UNSIGNED_INT, NULL, 0, 0,
+                                          OPAL_INFO_LVL_3, MCA_BASE_VAR_SCOPE_GROUP,
+                                          &mca_osc_sm_component.priority);
+    free(description_str);
+
     return OPAL_SUCCESS;
 }
 
@@ -179,7 +191,7 @@ component_query(struct ompi_win_t *win, void **base, size_t size, int disp_unit,
         }
     }
 
-    return 100;
+    return mca_osc_sm_component.priority;
 }