Commit bef1909e authored Jun 12, 2014 by Per Hurtig Committed by David S. Miller Jun 12, 2014

tcp: fixing TLP's FIN recovery



Fix to a problem observed when losing a FIN segment that does not
contain data.  In such situations, TLP is unable to recover from
*any* tail loss and instead adds at least PTO ms to the
retransmission process, i.e., RTO = RTO + PTO.

Signed-off-by: Per Hurtig <per.hurtig@kau.se>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Nandita Dukkipati <nanditad@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent fba0e1a3

net/ipv4/tcp_output.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -2131,8 +2131,6 @@ void tcp_send_loss_probe(struct sock *sk)
		if (WARN_ON(!skb \|\| !tcp_skb_pcount(skb)))
		goto rearm_timer;

		/* Probe with zero data doesn't trigger fast recovery. */
		if (skb->len > 0)
		err = __tcp_retransmit_skb(sk, skb);

		/* Record snd_nxt for loss detection. */