+++ b/kernel/sched/fair.c

@@ -5896,6 +5896,18 @@ fix_small_capacity(struct sched_domain *sd, struct sched_group *group)
 }
 
 /*
+ * Check whether the capacity of the rq has been noticeably reduced by side
+ * activity. The imbalance_pct is used for the threshold.
+ * Return true is the capacity is reduced
+ */
+static inline int
+check_cpu_capacity(struct rq *rq, struct sched_domain *sd)
+{
+	return ((rq->cpu_capacity * sd->imbalance_pct) <
+				(rq->cpu_capacity_orig * 100));
+}
+
+/*
  * Group imbalance indicates (and tries to solve) the problem where balancing
  * groups is inadequate due to tsk_cpus_allowed() constraints.
  *

@@ -6567,6 +6579,14 @@ static int need_active_balance(struct lb_env *env)
 		 */
 		if ((sd->flags & SD_ASYM_PACKING) && env->src_cpu > env->dst_cpu)
 			return 1;
+
+		/*
+		 * The src_cpu's capacity is reduced because of other
+		 * sched_class or IRQs, we trig an active balance to move the
+		 * task
+		 */
+		if (check_cpu_capacity(env->src_rq, sd))
+			return 1;
 	}