tcp: No need to clear retransmit_skb_hint when SACKing
authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Sun, 21 Sep 2008 04:21:16 +0000 (21:21 -0700)
committerDavid S. Miller <davem@davemloft.net>
Sun, 21 Sep 2008 04:21:16 +0000 (21:21 -0700)
Because lost counter no longer requires tuning, this is
trivial to remove (the tuning wouldn't have been too
hard either) because no "new" retransmittable skb appeared
below retransmit_skb_hint when SACKing for sure.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp_input.c

index 28e93f1..d017aed 100644 (file)
@@ -1298,9 +1298,6 @@ static int tcp_sacktag_one(struct sk_buff *skb, struct sock *sk,
                                        ~(TCPCB_LOST|TCPCB_SACKED_RETRANS);
                                tp->lost_out -= tcp_skb_pcount(skb);
                                tp->retrans_out -= tcp_skb_pcount(skb);
-
-                               /* clear lost hint */
-                               tp->retransmit_skb_hint = NULL;
                        }
                } else {
                        if (!(sacked & TCPCB_RETRANS)) {
@@ -1319,9 +1316,6 @@ static int tcp_sacktag_one(struct sk_buff *skb, struct sock *sk,
                        if (sacked & TCPCB_LOST) {
                                TCP_SKB_CB(skb)->sacked &= ~TCPCB_LOST;
                                tp->lost_out -= tcp_skb_pcount(skb);
-
-                               /* clear lost hint */
-                               tp->retransmit_skb_hint = NULL;
                        }
                }
 
@@ -1351,7 +1345,6 @@ static int tcp_sacktag_one(struct sk_buff *skb, struct sock *sk,
        if (dup_sack && (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_RETRANS)) {
                TCP_SKB_CB(skb)->sacked &= ~TCPCB_SACKED_RETRANS;
                tp->retrans_out -= tcp_skb_pcount(skb);
-               tp->retransmit_skb_hint = NULL;
        }
 
        return flag;