osc/sm: avoid filename collision when multiple windows share same CID

This commit fixes an issue identified by MTT where we can have two
different sets of processes on the same node creating a shared memory
window with communicators sharing the same CID. To avoid this issue
the temporary filename now includes the creating processes vpid.

References #5363

Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>

ompi/mca/osc/sm/osc_sm_component.c

@@ -282,9 +282,9 @@ component_select(struct ompi_win_t *win, void **base, size_t size, int disp_unit
         posts_size += OPAL_ALIGN_PAD_AMOUNT(posts_size, 64);
         if (0 == ompi_comm_rank (module->comm)) {
             char *data_file;
-            ret = asprintf (&data_file, "%s" OPAL_PATH_SEP "osc_sm.%s.%x.%d",
-                           mca_osc_sm_component.backing_directory, ompi_process_info.nodename,
-                           OMPI_PROC_MY_NAME->jobid, ompi_comm_get_cid(module->comm));
+            ret = asprintf (&data_file, "%s" OPAL_PATH_SEP "osc_sm.%s.%x.%d.%d",
+                            mca_osc_sm_component.backing_directory, ompi_process_info.nodename,
+                            OMPI_PROC_MY_NAME->jobid, (int) OMPI_PROC_MY_NAME->vpid, ompi_comm_get_cid(module->comm));
             if (ret < 0) {
                 return OMPI_ERR_OUT_OF_RESOURCE;
             }