@@ -6214,17 +6178,21 @@ static inline void update_sd_lb_stats(struct lb_env *env, struct sd_lb_stats *sd
 
 		/*
 		 * In case the child domain prefers tasks go to siblings
+		 * first, lower the sg capacity to one so that we'll try
 		 * and move all the excess tasks away. We lower the capacity
 		 * of a group only if the local group has the capacity to fit
+		 * these excess tasks, i.e. group_capacity > 0. The
 		 * extra check prevents the case where you always pull from the
 		 * heaviest group when it is already under-utilized (possible
 		 * with a large weight task outweighs the tasks on the system).
 		 */
 		if (prefer_sibling && sds->local &&
+		    group_has_capacity(env, &sds->local_stat)) {
+			if (sgs->sum_nr_running > 1)
+				sgs->group_no_capacity = 1;
+			sgs->group_capacity = min(sgs->group_capacity,
+						SCHED_CAPACITY_SCALE);
+		}
 
 		if (update_sd_pick_busiest(env, sds, sg, sgs)) {
 			sds->busiest = sg;

@@ -6490,8 +6460,8 @@ static struct sched_group *find_busiest_group(struct lb_env *env)
 		goto force_balance;
 
 	/* SD_BALANCE_NEWIDLE trumps SMP nice when underutilized */
-	if (env->idle == CPU_NEWLY_IDLE && local->group_has_free_capacity &&
-	    !busiest->group_has_free_capacity)
+	if (env->idle == CPU_NEWLY_IDLE && group_has_capacity(env, local) &&
+	    busiest->group_no_capacity)
 		goto force_balance;
 
 	/*