Commit 908a75c1 authored Jul 05, 2005 by David S. Miller

[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 <davem@davemloft.net>

parent 63d886c9

net/ipv4/tcp_output.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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 \|\|