diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index a21f8ed26343..7036e30c449f 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -863,9 +863,8 @@ void mptcp_data_ready(struct sock *sk, struct sock *ssk)
 
 	/* Wake-up the reader only for in-sequence data */
 	mptcp_data_lock(sk);
-	if (move_skbs_to_msk(msk, ssk))
+	if (move_skbs_to_msk(msk, ssk) && mptcp_epollin_ready(sk))
 		sk->sk_data_ready(sk);
-
 	mptcp_data_unlock(sk);
 }
 
@@ -1922,6 +1921,7 @@ static int __mptcp_recvmsg_mskq(struct mptcp_sock *msk,
 			if (!(flags & MSG_PEEK)) {
 				MPTCP_SKB_CB(skb)->offset += count;
 				MPTCP_SKB_CB(skb)->map_seq += count;
+				msk->bytes_consumed += count;
 			}
 			break;
 		}
@@ -1932,6 +1932,7 @@ static int __mptcp_recvmsg_mskq(struct mptcp_sock *msk,
 			WRITE_ONCE(msk->rmem_released, msk->rmem_released + skb->truesize);
 			__skb_unlink(skb, &msk->receive_queue);
 			__kfree_skb(skb);
+			msk->bytes_consumed += count;
 		}
 
 		if (copied >= len)
@@ -2755,6 +2756,7 @@ static void __mptcp_init_sock(struct sock *sk)
 	msk->rmem_fwd_alloc = 0;
 	WRITE_ONCE(msk->rmem_released, 0);
 	msk->timer_ival = TCP_RTO_MIN;
+	msk->scaling_ratio = TCP_DEFAULT_SCALING_RATIO;
 
 	WRITE_ONCE(msk->first, NULL);
 	inet_csk(sk)->icsk_sync_mss = mptcp_sync_mss;
@@ -2964,16 +2966,9 @@ void __mptcp_unaccepted_force_close(struct sock *sk)
 	__mptcp_destroy_sock(sk);
 }
 
-static __poll_t mptcp_check_readable(struct mptcp_sock *msk)
+static __poll_t mptcp_check_readable(struct sock *sk)
 {
-	/* Concurrent splices from sk_receive_queue into receive_queue will
-	 * always show at least one non-empty queue when checked in this order.
-	 */
-	if (skb_queue_empty_lockless(&((struct sock *)msk)->sk_receive_queue) &&
-	    skb_queue_empty_lockless(&msk->receive_queue))
-		return 0;
-
-	return EPOLLIN | EPOLLRDNORM;
+	return mptcp_epollin_ready(sk) ? EPOLLIN | EPOLLRDNORM : 0;
 }
 
 static void mptcp_check_listen_stop(struct sock *sk)
@@ -3011,7 +3006,7 @@ bool __mptcp_close(struct sock *sk, long timeout)
 		goto cleanup;
 	}
 
-	if (mptcp_check_readable(msk) || timeout < 0) {
+	if (mptcp_data_avail(msk) || timeout < 0) {
 		/* If the msk has read data, or the caller explicitly ask it,
 		 * do the MPTCP equivalent of TCP reset, aka MPTCP fastclose
 		 */
@@ -3138,6 +3133,7 @@ static int mptcp_disconnect(struct sock *sk, int flags)
 	msk->snd_data_fin_enable = false;
 	msk->rcv_fastclose = false;
 	msk->use_64bit_ack = false;
+	msk->bytes_consumed = 0;
 	WRITE_ONCE(msk->csum_enabled, mptcp_is_checksum_enabled(sock_net(sk)));
 	mptcp_pm_data_reset(msk);
 	mptcp_ca_reset(sk);
@@ -3909,7 +3905,7 @@ static __poll_t mptcp_poll(struct file *file, struct socket *sock,
 		mask |= EPOLLIN | EPOLLRDNORM | EPOLLRDHUP;
 
 	if (state != TCP_SYN_SENT && state != TCP_SYN_RECV) {
-		mask |= mptcp_check_readable(msk);
+		mask |= mptcp_check_readable(sk);
 		if (shutdown & SEND_SHUTDOWN)
 			mask |= EPOLLOUT | EPOLLWRNORM;
 		else
@@ -3947,6 +3943,7 @@ static const struct proto_ops mptcp_stream_ops = {
 	.sendmsg	   = inet_sendmsg,
 	.recvmsg	   = inet_recvmsg,
 	.mmap		   = sock_no_mmap,
+	.set_rcvlowat	   = mptcp_set_rcvlowat,
 };
 
 static struct inet_protosw mptcp_protosw = {
@@ -4048,6 +4045,7 @@ static const struct proto_ops mptcp_v6_stream_ops = {
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	   = inet6_compat_ioctl,
 #endif
+	.set_rcvlowat	   = mptcp_set_rcvlowat,
 };
 
 static struct proto mptcp_v6_prot;
diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index 4c9e7ade160d..620a82cd4c10 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -267,6 +267,7 @@ struct mptcp_sock {
 	atomic64_t	rcv_wnd_sent;
 	u64		rcv_data_fin_seq;
 	u64		bytes_retrans;
+	u64		bytes_consumed;
 	int		rmem_fwd_alloc;
 	int		snd_burst;
 	int		old_wspace;
@@ -657,6 +658,24 @@ struct sock *mptcp_subflow_get_retrans(struct mptcp_sock *msk);
 int mptcp_sched_get_send(struct mptcp_sock *msk);
 int mptcp_sched_get_retrans(struct mptcp_sock *msk);
 
+static inline u64 mptcp_data_avail(const struct mptcp_sock *msk)
+{
+	return READ_ONCE(msk->bytes_received) - READ_ONCE(msk->bytes_consumed);
+}
+
+static inline bool mptcp_epollin_ready(const struct sock *sk)
+{
+	/* mptcp doesn't have to deal with small skbs in the receive queue,
+	 * at it can always coalesce them
+	 */
+	return (mptcp_data_avail(mptcp_sk(sk)) >= sk->sk_rcvlowat) ||
+	       (mem_cgroup_sockets_enabled && sk->sk_memcg &&
+		mem_cgroup_under_socket_pressure(sk->sk_memcg)) ||
+	       READ_ONCE(tcp_memory_pressure);
+}
+
+int mptcp_set_rcvlowat(struct sock *sk, int val);
+
 static inline bool __tcp_can_send(const struct sock *ssk)
 {
 	/* only send if our side has not closed yet */
@@ -731,6 +750,7 @@ static inline bool mptcp_is_fully_established(struct sock *sk)
 	return inet_sk_state_load(sk) == TCP_ESTABLISHED &&
 	       READ_ONCE(mptcp_sk(sk)->fully_established);
 }
+
 void mptcp_rcv_space_init(struct mptcp_sock *msk, const struct sock *ssk);
 void mptcp_data_ready(struct sock *sk, struct sock *ssk);
 bool mptcp_finish_join(struct sock *sk);
diff --git a/net/mptcp/sockopt.c b/net/mptcp/sockopt.c
index 59bd5e114392..d15891e23f45 100644
--- a/net/mptcp/sockopt.c
+++ b/net/mptcp/sockopt.c
@@ -1472,9 +1472,51 @@ void mptcp_sockopt_sync_locked(struct mptcp_sock *msk, struct sock *ssk)
 
 	msk_owned_by_me(msk);
 
+	ssk->sk_rcvlowat = 0;
+
 	if (READ_ONCE(subflow->setsockopt_seq) != msk->setsockopt_seq) {
 		sync_socket_options(msk, ssk);
 
 		subflow->setsockopt_seq = msk->setsockopt_seq;
 	}
 }
+
+/* unfortunately this is different enough from the tcp version so
+ * that we can't factor it out
+ */
+int mptcp_set_rcvlowat(struct sock *sk, int val)
+{
+	struct mptcp_subflow_context *subflow;
+	int space, cap;
+
+	if (sk->sk_userlocks & SOCK_RCVBUF_LOCK)
+		cap = sk->sk_rcvbuf >> 1;
+	else
+		cap = READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_rmem[2]) >> 1;
+	val = min(val, cap);
+	WRITE_ONCE(sk->sk_rcvlowat, val ? : 1);
+
+	/* Check if we need to signal EPOLLIN right now */
+	if (mptcp_epollin_ready(sk))
+		sk->sk_data_ready(sk);
+
+	if (sk->sk_userlocks & SOCK_RCVBUF_LOCK)
+		return 0;
+
+	space = __tcp_space_from_win(mptcp_sk(sk)->scaling_ratio, val);
+	if (space <= sk->sk_rcvbuf)
+		return 0;
+
+	/* propagate the rcvbuf changes to all the subflows */
+	WRITE_ONCE(sk->sk_rcvbuf, space);
+	mptcp_for_each_subflow(mptcp_sk(sk), subflow) {
+		struct sock *ssk = mptcp_subflow_tcp_sock(subflow);
+		bool slow;
+
+		slow = lock_sock_fast(ssk);
+		WRITE_ONCE(ssk->sk_rcvbuf, space);
+		tcp_sk(ssk)->window_clamp = val;
+		unlock_sock_fast(ssk, slow);
+	}
+	return 0;
+}
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index dbc7a52b322f..080b16426222 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -1405,10 +1405,18 @@ static void subflow_data_ready(struct sock *sk)
 	WARN_ON_ONCE(!__mptcp_check_fallback(msk) && !subflow->mp_capable &&
 		     !subflow->mp_join && !(state & TCPF_CLOSE));
 
-	if (mptcp_subflow_data_available(sk))
+	if (mptcp_subflow_data_available(sk)) {
 		mptcp_data_ready(parent, sk);
-	else if (unlikely(sk->sk_err))
+
+		/* subflow-level lowat test are not relevant.
+		 * respect the msk-level threshold eventually mandating an immediate ack
+		 */
+		if (mptcp_data_avail(msk) < parent->sk_rcvlowat &&
+		    (tcp_sk(sk)->rcv_nxt - tcp_sk(sk)->rcv_wup) > inet_csk(sk)->icsk_ack.rcv_mss)
+			inet_csk(sk)->icsk_ack.pending |= ICSK_ACK_NOW;
+	} else if (unlikely(sk->sk_err)) {
 		subflow_error_report(sk);
+	}
 }
 
 static void subflow_write_space(struct sock *ssk)
