[TCP]: Never TSO defer under periods of congestion.

Congestion window recover after loss depends upon the fact that if we have a full MSS sized frame at the head of the send queue, we will send it. TSO deferral can defeat the ACK clocking necessary to exit cleanly from recovery. Signed-off-by: David S. Miller <[email protected]>
ambv · Jul 5, 2005 · 908a75c · 908a75c
1 parent 63d886c
commit 908a75c
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
@@ -909,6 +909,9 @@ static int tcp_tso_should_defer(struct sock *sk, struct tcp_sock *tp, struct sk_
 	if (TCP_SKB_CB(skb)->flags & TCPCB_FLAG_FIN)
 		return 0;
 
+	if (tp->ca_state != TCP_CA_Open)
+		return 0;
+
 	in_flight = tcp_packets_in_flight(tp);
 
 	BUG_ON(tcp_skb_pcount(skb) <= 1 ||