Add overcommit flag to job_step_create_request_msg_t structure

slurm/slurm.h.in

@@ -489,6 +489,8 @@ typedef struct job_step_specs {
 	char *node_list;	/* list of required nodes */
 	char *network;		/* network use spec */
 	char *name;		/* name of the job step, default "" */
+	uint8_t overcommit;     /* flag, 1 to allow overcommit of processors,
+				   0 to disallow overcommit. */
 } job_step_create_request_msg_t;
 
 typedef struct slurm_step_layout {

src/common/slurm_protocol_pack.c

@@ -1437,6 +1437,7 @@ unpack_error:
 	*msg = NULL;
 	return SLURM_ERROR;
 }
+
 static void
 _pack_job_step_create_request_msg(job_step_create_request_msg_t
 				  * msg, Buf buffer)
@@ -1456,6 +1457,7 @@ _pack_job_step_create_request_msg(job_step_create_request_msg_t
 	packstr(msg->name, buffer);
 	packstr(msg->network, buffer);
 	packstr(msg->node_list, buffer);
+	pack8((uint8_t)msg->overcommit, buffer);
 }
 
 static int
@@ -1483,6 +1485,7 @@ _unpack_job_step_create_request_msg(job_step_create_request_msg_t ** msg,
 	safe_unpackstr_xmalloc(&(tmp_ptr->name), &uint16_tmp, buffer);
 	safe_unpackstr_xmalloc(&(tmp_ptr->network), &uint16_tmp, buffer);
 	safe_unpackstr_xmalloc(&(tmp_ptr->node_list), &uint16_tmp, buffer);
+	safe_unpack8(&(tmp_ptr->overcommit), buffer);
 
 	return SLURM_SUCCESS;
 

src/slaunch/slaunch.c

@@ -157,6 +157,7 @@ int slaunch(int argc, char **argv)
 	step_req.cpu_count = 0; /* FIXME */
 	step_req.relative = opt.relative;
 	step_req.task_dist = opt.distribution;
+	step_req.overcommit = opt.overcommit ? 1 : 0;
 	step_req.port = 0;      /* historical, used by srun */
 	step_req.host = NULL;   /* historical, used by srun */
 

src/srun/allocate.c

@@ -561,6 +561,7 @@ _step_req_create(srun_job_t *j)
 	r->network    = xstrdup(opt.network);
 	r->name       = xstrdup(opt.job_name);
 	r->relative   = (uint16_t)opt.relative;
+	r->overcommit = opt.overcommit ? 1 : 0;
 	debug("requesting job %d, user %d, nodes %d (%s)", 
 	      r->job_id, r->user_id, r->node_count, r->node_list);
 	debug("cpus %d, tasks %d, name %s, relative %d",