Do not push child processes into separate process groups so that any …

orte/mca/ess/hnp/ess_hnp_module.c

@@ -786,10 +786,8 @@ static int rte_finalize(void)
         /** Remove the USR signal handlers */
         opal_event_signal_del(&sigusr1_handler);
         opal_event_signal_del(&sigusr2_handler);
-        if (orte_forward_job_control) {
-            opal_event_signal_del(&sigtstp_handler);
-            opal_event_signal_del(&sigcont_handler);
-        }
+        opal_event_signal_del(&sigtstp_handler);
+        opal_event_signal_del(&sigcont_handler);
         signals_set = false;
     }
 

orte/mca/odls/alps/odls_alps_module.c

@@ -416,13 +416,6 @@ static int do_child(orte_app_context_t* context,
     sigset_t sigs;
     char *param, *msg;
 
-    if (orte_forward_job_control) {
-        /* Set a new process group for this child, so that a
-           SIGSTOP can be sent to it without being sent to the
-           orted. */
-        setpgid(0, 0);
-    }
-
     /* Setup the pipe to be close-on-exec */
     opal_fd_set_cloexec(write_fd);
 
@@ -798,11 +791,6 @@ static int send_signal(pid_t pid, int signal)
                          ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                          signal, (long)pid));
 
-    if (orte_forward_job_control) {
-	/* Send the signal to the process group rather than the
-	   process.  The child is the leader of its process group. */
-	pid = -pid;
-    }
     if (kill(pid, signal) != 0) {
         switch(errno) {
             case EINVAL:

orte/mca/odls/default/odls_default_module.c

@@ -193,18 +193,18 @@ static bool odls_default_child_died(orte_proc_t *child)
              * that occasionally causes us to incorrectly report a proc
              * as refusing to die. Unfortunately, errno may not be reset
              * by waitpid in this case, so we cannot check it.
-	     *
-	     * (note the previous fix to this, to return 'process dead'
-	     * here, fixes the race condition at the cost of reporting
-	     * all live processes have immediately died!  Better to
-	     * occasionally report a dead process as still living -
-	     * which will occasionally trip the timeout for cases that
-	     * are right on the edge.)
+             *
+             * (note the previous fix to this, to return 'process dead'
+             * here, fixes the race condition at the cost of reporting
+             * all live processes have immediately died!  Better to
+             * occasionally report a dead process as still living -
+             * which will occasionally trip the timeout for cases that
+             * are right on the edge.)
              */
             OPAL_OUTPUT_VERBOSE((20, orte_odls_base_framework.framework_output,
                                  "%s odls:default:WAITPID INDICATES PID %d MAY HAVE ALREADY EXITED",
                                  ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), (int)(child->pid)));
-	    /* Do nothing, process still alive */
+            /* Do nothing, process still alive */
         } else if (-1 == ret && ECHILD == errno) {
             /* The pid no longer exists, so we'll call this "good
                enough for government work" */
@@ -228,23 +228,10 @@ static bool odls_default_child_died(orte_proc_t *child)
     return false;
 }
 
+
+/* deliver a signal to a specified pid. */
 static int odls_default_kill_local(pid_t pid, int signum)
 {
-    pid_t pgrp;
-
-#if HAVE_SETPGID
-    pgrp = getpgid(pid);
-    if (-1 != pgrp) {
-        /* target the lead process of the process
-         * group so we ensure that the signal is
-         * seen by all members of that group. This
-         * ensures that the signal is seen by any
-         * child processes our child may have
-         * started
-         */
-        pid = pgrp;
-    }
-#endif
     if (0 != kill(pid, signum)) {
         if (ESRCH != errno) {
             OPAL_OUTPUT_VERBOSE((2, orte_odls_base_framework.framework_output,
@@ -391,13 +378,6 @@ static int do_child(orte_app_context_t* context,
     long fd, fdmax = sysconf(_SC_OPEN_MAX);
     char *param, *msg;
 
-    if (orte_forward_job_control) {
-        /* Set a new process group for this child, so that a
-           SIGSTOP can be sent to it without being sent to the
-           orted. */
-        setpgid(0, 0);
-    }
-
     /* Setup the pipe to be close-on-exec */
     opal_fd_set_cloexec(write_fd);
 
@@ -720,10 +700,7 @@ static int odls_default_fork_local_proc(orte_app_context_t* context,
     }
 
     if (pid == 0) {
-	close(p[0]);
-#if HAVE_SETPGID
-        setpgid(0, 0);
-#endif
+        close(p[0]);
         do_child(context, child, environ_copy, jobdat, p[1], opts);
         /* Does not return */
     }
@@ -770,11 +747,6 @@ static int send_signal(pid_t pid, int signal)
                          ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                          signal, (long)pid));
 
-    if (orte_forward_job_control) {
-	/* Send the signal to the process group rather than the
-	   process.  The child is the leader of its process group. */
-	pid = -pid;
-    }
     if (kill(pid, signal) != 0) {
         switch(errno) {
             case EINVAL:

orte/runtime/orte_globals.c

@@ -143,9 +143,6 @@ char *orte_output_filename = NULL;
 /* generate new xterm windows to display output from specified ranks */
 char *orte_xterm = NULL;
 
-/* whether or not to forward SIGTSTP and SIGCONT signals */
-bool orte_forward_job_control = false;
-
 /* report launch progress */
 bool orte_report_launch_progress = false;
 

orte/runtime/orte_globals.h

@@ -521,9 +521,6 @@ ORTE_DECLSPEC extern opal_pointer_array_t *orte_node_topologies;
 ORTE_DECLSPEC extern opal_pointer_array_t *orte_local_children;
 ORTE_DECLSPEC extern orte_vpid_t orte_total_procs;
 
-/* whether or not to forward SIGTSTP and SIGCONT signals */
-ORTE_DECLSPEC extern bool orte_forward_job_control;
-
 /* IOF controls */
 ORTE_DECLSPEC extern bool orte_tag_output;
 ORTE_DECLSPEC extern bool orte_timestamp_output;

orte/runtime/orte_mca_params.c

@@ -543,14 +543,6 @@ int orte_register_params(void)
         orte_map_stddiag_to_stderr = true;
     }
 
-    /* whether or not to forward SIGTSTP and SIGCONT signals */
-    orte_forward_job_control = false;
-    (void) mca_base_var_register ("orte", "orte", NULL, "forward_job_control",
-                                  "Forward SIGTSTP (after converting to SIGSTOP) and SIGCONT signals to the application procs [default: no]",
-                                  MCA_BASE_VAR_TYPE_BOOL, NULL, 0, 0,
-                                  OPAL_INFO_LVL_9, MCA_BASE_VAR_SCOPE_READONLY,
-                                  &orte_forward_job_control);
-
     /* whether or not to report launch progress */
     orte_report_launch_progress = false;
     (void) mca_base_var_register ("orte", "orte", NULL, "report_launch_progress",

orte/tools/orte-submit/orte-submit.1in

@@ -1133,9 +1133,7 @@ SIGUSR1 and SIGUSR2 signals received by orte-submit are propagated to
 all processes in the job.
 .
 .PP
-One can turn on forwarding of SIGSTOP and SIGCONT to the program executed
-by ompi-submit by setting the MCA parameter orte_forward_job_control to 1.
-A SIGTSTOP signal to ompi-submit will then cause a SIGSTOP signal to be sent
+A SIGTSTOP signal to ompi-submit will cause a SIGSTOP signal to be sent
 to all of the programs started by ompi-submit and likewise a SIGCONT signal
 to ompi-submit will cause a SIGCONT sent.
 .

orte/tools/orterun/orterun.1in

@@ -1240,9 +1240,7 @@ SIGUSR1 and SIGUSR2 signals received by orterun are propagated to
 all processes in the job.
 .
 .PP
-One can turn on forwarding of SIGSTOP and SIGCONT to the program executed
-by mpirun by setting the MCA parameter orte_forward_job_control to 1.
-A SIGTSTOP signal to mpirun will then cause a SIGSTOP signal to be sent
+A SIGTSTOP signal to mpirun will cause a SIGSTOP signal to be sent
 to all of the programs started by mpirun and likewise a SIGCONT signal
 to mpirun will cause a SIGCONT sent.
 .