---

yaml
---
r: 266890
b: refs/heads/master
c: e9266a0
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 30d3c128eafd2277ca2bb4b62845f25ad9295c12
+refs/heads/master: e9266a02b7e6542355431955075b4e688962fc0a

trunk/net/ipv4/tcp_input.c

@@ -345,17 +345,24 @@ static void tcp_grow_window(struct sock *sk, struct sk_buff *skb)
 
 static void tcp_fixup_rcvbuf(struct sock *sk)
 {
-	struct tcp_sock *tp = tcp_sk(sk);
-	int rcvmem = SKB_TRUESIZE(tp->advmss + MAX_TCP_HEADER);
+	u32 mss = tcp_sk(sk)->advmss;
+	u32 icwnd = TCP_DEFAULT_INIT_RCVWND;
+	int rcvmem;
 
-	/* Try to select rcvbuf so that 4 mss-sized segments
-	 * will fit to window and corresponding skbs will fit to our rcvbuf.
-	 * (was 3; 4 is minimum to allow fast retransmit to work.)
+	/* Limit to 10 segments if mss <= 1460,
+	 * or 14600/mss segments, with a minimum of two segments.
 	 */
-	while (tcp_win_from_space(rcvmem) < tp->advmss)
+	if (mss > 1460)
+		icwnd = max_t(u32, (1460 * TCP_DEFAULT_INIT_RCVWND) / mss, 2);
+
+	rcvmem = SKB_TRUESIZE(mss + MAX_TCP_HEADER);
+	while (tcp_win_from_space(rcvmem) < mss)
 		rcvmem += 128;
-	if (sk->sk_rcvbuf < 4 * rcvmem)
-		sk->sk_rcvbuf = min(4 * rcvmem, sysctl_tcp_rmem[2]);
+
+	rcvmem *= icwnd;
+
+	if (sk->sk_rcvbuf < rcvmem)
+		sk->sk_rcvbuf = min(rcvmem, sysctl_tcp_rmem[2]);
 }
 
 /* 4. Try to fixup all. It is made immediately after connection enters