diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 957e418f05f..8f2b1a9d0f1 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -44,6 +44,7 @@ static unsigned int normalized_sysctl_sched_latency	= 6000000ULL;
 
 #ifdef CONFIG_CACULE_SCHED
 int interactivity_factor				= 32768;
+#define MAX_LIFE_TIME_SMOOTHER				 10000000000ULL // 10 seconds
 #endif
 
 /*
@@ -592,15 +593,15 @@ static inline unsigned int
 calc_interactivity(u64 now, struct cacule_node *se)
 {
 	u64 l_se, vr_se, sleep_se, u64_factor;
-	unsigned int score_se;
+	unsigned int score_se, lifetime_smoother;
 
 	/*
 	 * in case of vruntime==0, logical OR with 1 would
 	 * make sure that the least sig. bit is 1
 	 */
 	l_se		= (now + 1ULL) - se->cacule_start_time;
-	vr_se		= se->vruntime		| 1;
-	sleep_se	= (l_se - vr_se)	| 1;
+	vr_se		= se->vruntime			| 1;
+	sleep_se	= (l_se - vr_se)		| 1;
 	u64_factor	= interactivity_factor;
 
 	if (sleep_se > vr_se)
@@ -608,7 +609,14 @@ calc_interactivity(u64 now, struct cacule_node *se)
 	else
 		score_se = (u64_factor / (vr_se / sleep_se)) + u64_factor;
 
-	return score_se;
+	if (l_se > MAX_LIFE_TIME_SMOOTHER)
+		return score_se;
+
+	u64_factor <<= 1;
+	lifetime_smoother = 
+		u64_factor - (u64_factor / (MAX_LIFE_TIME_SMOOTHER / (l_se | 1)));
+
+	return score_se + lifetime_smoother;
 }
 
 /*