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tcp: disable RFC6675 loss detection

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This patch disables RFC6675 loss detection and make sysctl
net.ipv4.tcp_recovery = 1 controls a binary choice between RACK
(1) or RFC6675 (0).

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Soheil Hassas Yeganeh <soheil@google.com>
Reviewed-by: Priyaranjan Jha <priyarjha@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yuchung Cheng
2018-05-16 16:40:11 -07:00
committed by David S. Miller
parent 20b654dfe1
commit b38a51fec1
2 changed files with 10 additions and 5 deletions
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3
Documentation/networking/ip-sysctl.txt
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@@ -449,7 +449,8 @@ tcp_recovery - INTEGER
features.
RACK: 0x1 enables the RACK loss detection for fast detection of lost
retransmissions and tail drops.
retransmissions and tail drops. It also subsumes and disables
RFC6675 recovery for SACK connections.
RACK: 0x2 makes RACK's reordering window static (min_rtt/4).
RACK: 0x4 disables RACK's DUPACK threshold heuristic