diff --git a/sys/kern/init_main.c b/sys/kern/init_main.c
--- a/sys/kern/init_main.c
+++ b/sys/kern/init_main.c
@@ -660,10 +660,7 @@
 		microuptime(&p->p_stats->p_start);
 		PROC_STATLOCK(p);
 		rufetch(p, &ru);	/* Clears thread stats */
-		p->p_rux.rux_runtime = 0;
-		p->p_rux.rux_uticks = 0;
-		p->p_rux.rux_sticks = 0;
-		p->p_rux.rux_iticks = 0;
+		ruxreset(&p->p_rux);
 		PROC_STATUNLOCK(p);
 		FOREACH_THREAD_IN_PROC(p, td) {
 			td->td_runtime = 0;
diff --git a/sys/sys/proc.h b/sys/sys/proc.h
--- a/sys/sys/proc.h
+++ b/sys/sys/proc.h
@@ -1326,6 +1326,18 @@
 	return ((struct td_sched *)&td[1]);
 }
 
+static __inline void
+ruxreset(struct rusage_ext *rux)
+{
+	rux->rux_runtime = 0;
+	rux->rux_uticks = 0;
+	rux->rux_sticks = 0;
+	rux->rux_iticks = 0;
+	rux->rux_uu = 0;
+	rux->rux_su = 0;
+	rux->rux_tu = 0;
+}
+
 #define	PROC_ID_PID	0
 #define	PROC_ID_GROUP	1
 #define	PROC_ID_SESSION	2