diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 37e1c5c..bd7aef5 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4449,6 +4449,58 @@
 	return 0;
 }
 
+/**
+ * tcp_try_coalesce - try to merge skb to prior one
+ * @sk: socket
+ * @to: prior buffer
+ * @from: buffer to add in queue
+ *
+ * Before queueing skb @from after @to, try to merge them
+ * to reduce overall memory use and queue lengths, if cost is small.
+ * Packets in ofo or receive queues can stay a long time.
+ * Better try to coalesce them right now to avoid future collapses.
+ * Returns > 0 value if caller should free @from instead of queueing it
+ */
+static int tcp_try_coalesce(struct sock *sk,
+			    struct sk_buff *to,
+			    struct sk_buff *from)
+{
+	int len = from->len;
+
+	if (tcp_hdr(from)->fin)
+		return 0;
+	if (len <= skb_tailroom(to)) {
+		BUG_ON(skb_copy_bits(from, 0, skb_put(to, len), len));
+merge:
+		NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPRCVCOALESCE);
+		TCP_SKB_CB(to)->end_seq = TCP_SKB_CB(from)->end_seq;
+		TCP_SKB_CB(to)->ack_seq = TCP_SKB_CB(from)->ack_seq;
+		return 1;
+	}
+	if (skb_headlen(from) == 0 &&
+	    !skb_has_frag_list(to) &&
+	    !skb_has_frag_list(from) &&
+	    (skb_shinfo(to)->nr_frags +
+	     skb_shinfo(from)->nr_frags <= MAX_SKB_FRAGS)) {
+		int delta = from->truesize - ksize(from->head) -
+			    SKB_DATA_ALIGN(sizeof(struct sk_buff));
+
+		WARN_ON_ONCE(delta < len);
+		memcpy(skb_shinfo(to)->frags + skb_shinfo(to)->nr_frags,
+		       skb_shinfo(from)->frags,
+		       skb_shinfo(from)->nr_frags * sizeof(skb_frag_t));
+		skb_shinfo(to)->nr_frags += skb_shinfo(from)->nr_frags;
+		skb_shinfo(from)->nr_frags = 0;
+		to->truesize += delta;
+		atomic_add(delta, &sk->sk_rmem_alloc);
+		sk_mem_charge(sk, delta);
+		to->len += len;
+		to->data_len += len;
+		goto merge;
+	}
+	return 0;
+}
+
 static void tcp_data_queue_ofo(struct sock *sk, struct sk_buff *skb)
 {
 	struct tcp_sock *tp = tcp_sk(sk);
@@ -4487,23 +4539,11 @@
 	end_seq = TCP_SKB_CB(skb)->end_seq;
 
 	if (seq == TCP_SKB_CB(skb1)->end_seq) {
-		/* Packets in ofo can stay in queue a long time.
-		 * Better try to coalesce them right now
-		 * to avoid future tcp_collapse_ofo_queue(),
-		 * probably the most expensive function in tcp stack.
-		 */
-		if (skb->len <= skb_tailroom(skb1) && !tcp_hdr(skb)->fin) {
-			NET_INC_STATS_BH(sock_net(sk),
-					 LINUX_MIB_TCPRCVCOALESCE);
-			BUG_ON(skb_copy_bits(skb, 0,
-					     skb_put(skb1, skb->len),
-					     skb->len));
-			TCP_SKB_CB(skb1)->end_seq = end_seq;
-			TCP_SKB_CB(skb1)->ack_seq = TCP_SKB_CB(skb)->ack_seq;
+		if (tcp_try_coalesce(sk, skb1, skb) <= 0) {
+			__skb_queue_after(&tp->out_of_order_queue, skb1, skb);
+		} else {
 			__kfree_skb(skb);
 			skb = NULL;
-		} else {
-			__skb_queue_after(&tp->out_of_order_queue, skb1, skb);
 		}
 
 		if (!tp->rx_opt.num_sacks ||
@@ -4624,13 +4664,18 @@
 		}
 
 		if (eaten <= 0) {
+			struct sk_buff *tail;
 queue_and_out:
 			if (eaten < 0 &&
 			    tcp_try_rmem_schedule(sk, skb->truesize))
 				goto drop;
 
-			skb_set_owner_r(skb, sk);
-			__skb_queue_tail(&sk->sk_receive_queue, skb);
+			tail = skb_peek_tail(&sk->sk_receive_queue);
+			eaten = tail ? tcp_try_coalesce(sk, tail, skb) : -1;
+			if (eaten <= 0) {
+				skb_set_owner_r(skb, sk);
+				__skb_queue_tail(&sk->sk_receive_queue, skb);
+			}
 		}
 		tp->rcv_nxt = TCP_SKB_CB(skb)->end_seq;
 		if (skb->len)