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tcp.7: Change default value of tcp_frto 

The default changed in c96fd3d461fa495400df24be3b3b66f0e0b152f9
(Linux 2.6.24).

Signed-off-by: Ruben Kerkhof <ruben@rubenkerkhof.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Ruben Kerkhof 2017-05-19 12:03:09 +02:00 committed by Michael Kerrisk
parent a42c0776f2
commit d6a42783c8
1 changed files with 4 additions and 1 deletions
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man7/tcp.7
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@ -472,7 +472,7 @@ In Linux 2.2, the default value was 180.
.\" .\"
.\" The following is from 2.6.12: Documentation/networking/ip-sysctl.txt .\" The following is from 2.6.12: Documentation/networking/ip-sysctl.txt
.TP .TP
.IR tcp_frto " (integer; default: 0; since Linux 2.4.21/2.6)" .IR tcp_frto " (integer; default: see below; since Linux 2.4.21/2.6)"
.\" Since 2.4.21/2.5.43 .\" Since 2.4.21/2.5.43
Enable F-RTO, an enhanced recovery algorithm for TCP retransmission Enable F-RTO, an enhanced recovery algorithm for TCP retransmission
timeouts (RTOs). timeouts (RTOs).
@ -485,13 +485,16 @@ This file can have one of the following values:
.RS .RS
.IP 0 3 .IP 0 3
Disabled. Disabled.
This was the default up to and including Linux 2.6.23.
.IP 1 .IP 1
The basic version F-RTO algorithm is enabled. The basic version F-RTO algorithm is enabled.
.IP 2 .IP 2
.\" commit c96fd3d461fa495400df24be3b3b66f0e0b152f9
Enable SACK-enhanced F-RTO if flow uses SACK. Enable SACK-enhanced F-RTO if flow uses SACK.
The basic version can be used also when The basic version can be used also when
SACK is in use though in that case scenario(s) exists where F-RTO SACK is in use though in that case scenario(s) exists where F-RTO
interacts badly with the packet counting of the SACK-enabled TCP flow. interacts badly with the packet counting of the SACK-enabled TCP flow.
This value is the default since Linux 2.6.24.
.RE .RE
.IP .IP
Before Linux 2.6.22, this parameter was a Boolean value, Before Linux 2.6.22, this parameter was a Boolean value,