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authorYuchung Cheng <ycheng@google.com>2018-05-16 16:40:11 -0700
committerDavid S. Miller <davem@davemloft.net>2018-05-17 15:41:28 -0400
commitb38a51fec1c1f693f03b1aa19d0622123634d4b7 (patch)
tree2dfede58dae59faf7da205143e3e00e1833e4bc7 /Documentation
parent20b654dfe1beaca60ab51894ff405a049248433d (diff)
downloadlinux-b38a51fec1c1f693f03b1aa19d0622123634d4b7.tar.bz2
tcp: disable RFC6675 loss detection
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>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/networking/ip-sysctl.txt3
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index 13bbac50dc8b..ea304a23c8d7 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -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