tcp: No need to clear retransmit_skb_hint when SACKing
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>
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f09142eddb
Коммит
184d68b2b0
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@ -1298,9 +1298,6 @@ static int tcp_sacktag_one(struct sk_buff *skb, struct sock *sk,
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~(TCPCB_LOST|TCPCB_SACKED_RETRANS);
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tp->lost_out -= tcp_skb_pcount(skb);
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tp->retrans_out -= tcp_skb_pcount(skb);
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/* clear lost hint */
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tp->retransmit_skb_hint = NULL;
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}
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} else {
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if (!(sacked & TCPCB_RETRANS)) {
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@ -1319,9 +1316,6 @@ static int tcp_sacktag_one(struct sk_buff *skb, struct sock *sk,
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if (sacked & TCPCB_LOST) {
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TCP_SKB_CB(skb)->sacked &= ~TCPCB_LOST;
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tp->lost_out -= tcp_skb_pcount(skb);
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/* clear lost hint */
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tp->retransmit_skb_hint = NULL;
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}
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}
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@ -1351,7 +1345,6 @@ static int tcp_sacktag_one(struct sk_buff *skb, struct sock *sk,
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if (dup_sack && (TCP_SKB_CB(skb)->sacked & TCPCB_SACKED_RETRANS)) {
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TCP_SKB_CB(skb)->sacked &= ~TCPCB_SACKED_RETRANS;
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tp->retrans_out -= tcp_skb_pcount(skb);
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tp->retransmit_skb_hint = NULL;
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}
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return flag;
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