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authorYuchung Cheng <ycheng@google.com>2017-01-13 07:11:39 +0100
committerDavid S. Miller <davem@davemloft.net>2017-01-14 04:37:16 +0100
commitbec41a11dd3dc8c54f766b4f494140ca92ba7c10 (patch)
tree62a888654cc55636c2ab85adf331db2361aae118 /net/ipv4/tcp_metrics.c
parenttcp: remove forward retransmit feature (diff)
downloadlinux-bec41a11dd3dc8c54f766b4f494140ca92ba7c10.tar.xz
linux-bec41a11dd3dc8c54f766b4f494140ca92ba7c10.zip
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_metrics.c')
-rw-r--r--net/ipv4/tcp_metrics.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index ba8f02d0f283..b9ed0d50aead 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -522,7 +522,6 @@ void tcp_init_metrics(struct sock *sk)
val = tcp_metric_get(tm, TCP_METRIC_REORDERING);
if (val && tp->reordering != val) {
tcp_disable_fack(tp);
- tcp_disable_early_retrans(tp);
tp->reordering = val;
}