o Disable SIGALRM to launch threads for now. THis seems to cause

   problems for the LinuxThreads

src/srun/launch.c

@@ -238,10 +238,16 @@ static int _check_pending_threads(thd_t *thd, int count)
 	time_t now = time(NULL);
 
 	for (i = 0; i < count; i++) {
-		if ((thd[i].state == DSH_ACTIVE) 
-		    && ((now - thd[i].tstart) >= 2) ) 
-			verbose("sending SIGALRM to thread %d", thd[i].thread);
-			pthread_kill(thd[i].thread, SIGALRM);
+		thd_t *tp = &thd[i];
+		if ((tp->state == DSH_ACTIVE) && ((now - tp->tstart) >= 2) ) {
+			debug2("sending SIGALRM to thread %d", tp->thread);
+			/*
+			 * XXX: sending sigalrm to threads *seems* to
+			 *  generate problems with the pthread_manager
+			 *  thread. Disable this signal for now
+			 * pthread_kill(tp->thread, SIGALRM);
+			 */
+		}
 	}
 
 	return 0;
@@ -305,12 +311,15 @@ static void _p_launch(slurm_msg_t *req, job_t *job)
 	int i;
 	thd_t *thd;
 	int rc = 0;
-	SigFunc *oldh;
-	sigset_t set;
 
-	oldh = xsignal(SIGALRM, (SigFunc *) _alrm_handler);
-	xsignal_save_mask(&set);
-	xsignal_unblock(SIGALRM);
+	/*
+	 * SigFunc *oldh;
+	 * sigset_t set;
+	 * 
+	 * oldh = xsignal(SIGALRM, (SigFunc *) _alrm_handler);
+	 * xsignal_save_mask(&set);
+	 * xsignal_unblock(SIGALRM);
+	 */
 
 	/*
 	 * Set job timeout to maximum launch time + current time
@@ -346,8 +355,10 @@ static void _p_launch(slurm_msg_t *req, job_t *job)
 		_wait_on_active(thd, job);
 	pthread_mutex_unlock(&active_mutex);
 
-	xsignal_restore_mask(&set);
-	xsignal(SIGALRM, oldh);
+	/*
+	 * xsignal_restore_mask(&set);
+	 * xsignal(SIGALRM, oldh);
+	 */
 
 	xfree(thd);
 }