BGQ - make sure we calculate the ntasks per node correctly given a node

and task count that isn't an even cut.

src/srun/opt.c

@@ -42,6 +42,7 @@
 #endif
 
 #include <string.h>		/* strcpy, strncasecmp */
+#include <math.h>
 
 #ifdef HAVE_STRINGS_H
 #  include <strings.h>
@@ -1670,7 +1671,12 @@ static void _opt_args(int argc, char **argv)
 			opt.max_nodes = opt.min_nodes = node_cnt = opt.ntasks;
 
 		if (!opt.ntasks_per_node || (opt.ntasks_per_node == NO_VAL)) {
-			opt.ntasks_per_node = opt.ntasks / node_cnt;
+			/* We always want the next larger number if
+			   there is a fraction so we try to stay in
+			   the allocation requested.
+			*/
+			opt.ntasks_per_node = ceil((double)opt.ntasks
+						   / (double)node_cnt);
 			figured = true;
 		}