--- zzzz-none-000/linux-5.4.213/net/sched/sch_fq_codel.c	2022-09-15 10:04:56.000000000 +0000
+++ miami-7690-761/linux-5.4.213/net/sched/sch_fq_codel.c	2024-05-29 11:20:02.000000000 +0000
@@ -305,6 +305,21 @@
 			    &flow->cvars, &q->cstats, qdisc_pkt_len,
 			    codel_get_enqueue_time, drop_func, dequeue_func);
 
+	/* If our qlen is 0 qdisc_tree_reduce_backlog() will deactivate
+	 * parent class, dequeue in parent qdisc will do the same if we
+	 * return skb. Temporary increment qlen if we have skb.
+	 */
+	if (q->cstats.drop_count) {
+		if (skb)
+			sch->q.qlen++;
+		qdisc_tree_reduce_backlog(sch, q->cstats.drop_count,
+					  q->cstats.drop_len);
+		if (skb)
+			sch->q.qlen--;
+		q->cstats.drop_count = 0;
+		q->cstats.drop_len = 0;
+	}
+
 	if (!skb) {
 		/* force a pass through old_flows to prevent starvation */
 		if ((head == &q->new_flows) && !list_empty(&q->old_flows))
@@ -315,15 +330,6 @@
 	}
 	qdisc_bstats_update(sch, skb);
 	flow->deficit -= qdisc_pkt_len(skb);
-	/* We cant call qdisc_tree_reduce_backlog() if our qlen is 0,
-	 * or HTB crashes. Defer it for next round.
-	 */
-	if (q->cstats.drop_count && sch->q.qlen) {
-		qdisc_tree_reduce_backlog(sch, q->cstats.drop_count,
-					  q->cstats.drop_len);
-		q->cstats.drop_count = 0;
-		q->cstats.drop_len = 0;
-	}
 	return skb;
 }
 
@@ -464,7 +470,11 @@
 
 	sch->limit = 10*1024;
 	q->flows_cnt = 1024;
+#ifdef CONFIG_X86_64
 	q->memory_limit = 32 << 20; /* 32 MBytes */
+#else
+	q->memory_limit = 4 << 20; /* 4 MBytes */
+#endif
 	q->drop_batch_size = 64;
 	q->quantum = psched_mtu(qdisc_dev(sch));
 	INIT_LIST_HEAD(&q->new_flows);
@@ -700,7 +710,7 @@
 	.walk		=	fq_codel_walk,
 };
 
-static struct Qdisc_ops fq_codel_qdisc_ops __read_mostly = {
+struct Qdisc_ops fq_codel_qdisc_ops __read_mostly = {
 	.cl_ops		=	&fq_codel_class_ops,
 	.id		=	"fq_codel",
 	.priv_size	=	sizeof(struct fq_codel_sched_data),
@@ -715,6 +725,7 @@
 	.dump_stats =	fq_codel_dump_stats,
 	.owner		=	THIS_MODULE,
 };
+EXPORT_SYMBOL(fq_codel_qdisc_ops);
 
 static int __init fq_codel_module_init(void)
 {