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authorYuchung Cheng <ycheng@google.com>2017-01-13 09:11:39 +0300
committerDavid S. Miller <davem@davemloft.net>2017-01-14 06:37:16 +0300
commitbec41a11dd3dc8c54f766b4f494140ca92ba7c10 (patch)
tree62a888654cc55636c2ab85adf331db2361aae118 /net/ipv4/tcp_ipv4.c
parent840a3cbe89694fad75578856976f180e852e69aa (diff)
downloadlinux-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_ipv4.c')
-rw-r--r--net/ipv4/tcp_ipv4.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index ebf3e0c4967a..63214136cf1c 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -2229,7 +2229,6 @@ static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i)
int state;
if (icsk->icsk_pending == ICSK_TIME_RETRANS ||
- icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||
icsk->icsk_pending == ICSK_TIME_REO_TIMEOUT ||
icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {
timer_active = 1;