From bec41a11dd3dc8c54f766b4f494140ca92ba7c10 Mon Sep 17 00:00:00 2001 From: Yuchung Cheng Date: Thu, 12 Jan 2017 22:11:39 -0800 Subject: tcp: remove early retransmit This patch removes the support of RFC5827 early retransmit (i.e., fast recovery on small inflight with <3 dupacks) because it is subsumed by the new RACK loss detection. More specifically when RACK receives DUPACKs, it'll arm a reordering timer to start fast recovery after a quarter of (min)RTT, hence it covers the early retransmit except RACK does not limit itself to specific inflight or dupack numbers. Signed-off-by: Yuchung Cheng Signed-off-by: Neal Cardwell Acked-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv4/tcp_timer.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'net/ipv4/tcp_timer.c') diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c index 953c02a8566e..40d893556e67 100644 --- a/net/ipv4/tcp_timer.c +++ b/net/ipv4/tcp_timer.c @@ -566,9 +566,6 @@ void tcp_write_timer_handler(struct sock *sk) case ICSK_TIME_REO_TIMEOUT: tcp_rack_reo_timeout(sk); break; - case ICSK_TIME_EARLY_RETRANS: - tcp_resume_early_retransmit(sk); - break; case ICSK_TIME_LOSS_PROBE: tcp_send_loss_probe(sk); break; -- cgit v1.2.3