sharedfp/sm: close the named semaphore

in case a named semaphore is used, it is necessary to close the semaphore to remove all sm segments. sem_unlink just removes the name references once all proceeses have closed the sem. This is a cherry-pick of commit 4d995bd Fixes issue: open-mpi#4336 Signed-off-by: Edgar Gabriel <[email protected]> sharedfp/sm: unlink only needs to be called by one process Signed-off-by: Edgar Gabriel <[email protected]>
edgargabriel · Jan 10, 2018 · 444e95b · 444e95b
1 parent 0b0fedf
commit 444e95b
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/ompi/mca/sharedfp/sm/sharedfp_sm_file_open.c b/ompi/mca/sharedfp/sm/sharedfp_sm_file_open.c
@@ -235,6 +235,12 @@ int mca_sharedfp_sm_file_open (struct ompi_communicator_t *comm,
 
     comm->c_coll.coll_barrier (comm, comm->c_coll.coll_barrier_module );
 
+#if defined(HAVE_SEM_OPEN)
+    if ( 0 == rank ) {
+        sem_unlink ( sm_data->sem_name);
+    }
+#endif
+
     return err;
 }
 
@@ -267,7 +273,7 @@ int mca_sharedfp_sm_file_close (mca_io_ompio_file_t *fh)
         if (file_data->sm_offset_ptr) {
             /* destroy semaphore */
 #if defined(HAVE_SEM_OPEN)
-             sem_unlink (file_data->sem_name);
+             sem_close ( file_data->mutex);
              free (file_data->sem_name);
 #elif defined(HAVE_SEM_INIT)
             sem_destroy(&file_data->sm_offset_ptr->mutex);