diff --git a/kernel/sched/pelt.c b/kernel/sched/pelt.c
index cd54fab42cf4..bbb0de2219f9 100644
--- a/kernel/sched/pelt.c
+++ b/kernel/sched/pelt.c
@@ -32,15 +32,16 @@ int pelt_load_avg_period = PELT32_LOAD_AVG_PERIOD;
 int pelt_load_avg_max = PELT32_LOAD_AVG_MAX;
 const u32 *pelt_runnable_avg_yN_inv = pelt32_runnable_avg_yN_inv;
 
-static int __init set_pelt(char *str)
+int get_pelt_halflife(void)
 {
-	int rc, num;
+	return pelt_load_avg_period;
+}
+EXPORT_SYMBOL_GPL(get_pelt_halflife);
 
-	rc = kstrtoint(str, 0, &num);
-	if (rc) {
-		pr_err("%s: kstrtoint failed. rc=%d\n", __func__, rc);
-		return 0;
-	}
+static int __set_pelt_halflife(void *data)
+{
+	int rc = 0;
+	int num = *(int *)data;
 
 	switch (num) {
 	case PELT8_LOAD_AVG_PERIOD:
@@ -56,10 +57,32 @@ static int __init set_pelt(char *str)
 		pr_info("PELT half life is set to %dms\n", num);
 		break;
 	default:
-		pr_err("Default PELT half life is 32ms\n");
+		rc = -EINVAL;
+		pr_err("Failed to set PELT half life to %dms, the current value is %dms\n",
+			num, pelt_load_avg_period);
 	}
 
-	return 0;
+	return rc;
+}
+
+int set_pelt_halflife(int num)
+{
+	return stop_machine(__set_pelt_halflife, &num, NULL);
+}
+EXPORT_SYMBOL_GPL(set_pelt_halflife);
+
+static int __init set_pelt(char *str)
+{
+	int rc, num;
+
+	rc = kstrtoint(str, 0, &num);
+	if (rc) {
+		pr_err("%s: kstrtoint failed. rc=%d\n", __func__, rc);
+		return 0;
+	}
+
+	__set_pelt_halflife(&num);
+	return rc;
 }
 
 early_param("pelt", set_pelt);