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[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>
This commit is contained in:
David S. Miller 2005-07-05 15:43:58 -07:00
parent 63d886c96b
commit 908a75c17a
1 changed files with 3 additions and 0 deletions
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3
net/ipv4/tcp_output.c
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@ -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 ||