diff options
| author | Yuchung Cheng <ycheng@google.com> | 2017-01-12 22:11:39 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-01-13 22:37:16 -0500 |
| commit | bec41a11dd3dc8c54f766b4f494140ca92ba7c10 (patch) | |
| tree | 62a888654cc55636c2ab85adf331db2361aae118 /net/ipv4/tcp.c | |
| parent | 840a3cbe89694fad75578856976f180e852e69aa (diff) | |
| download | linux-bec41a11dd3dc8c54f766b4f494140ca92ba7c10.tar.gz linux-bec41a11dd3dc8c54f766b4f494140ca92ba7c10.tar.xz | |
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 <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp.c')
| -rw-r--r-- | net/ipv4/tcp.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index c8d46c140b4a..d9023e8ed53e 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -406,7 +406,6 @@ void tcp_init_sock(struct sock *sk) tp->mss_cache = TCP_MSS_DEFAULT; tp->reordering = sock_net(sk)->ipv4.sysctl_tcp_reordering; - tcp_enable_early_retrans(tp); tcp_assign_congestion_control(sk); tp->tsoffset = 0; @@ -2477,8 +2476,6 @@ static int do_tcp_setsockopt(struct sock *sk, int level, err = -EINVAL; else { tp->thin_dupack = val; - if (tp->thin_dupack) - tcp_disable_early_retrans(tp); } break; |