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tcp.7: Document value '2' for tcp_timestamps 

Since Linux 4.10, the value '2' is meaningful for tcp_timestamps

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2017-05-22 14:11:07 +02:00
parent e0a73a311f
commit cb4975dfbe
1 changed files with 16 additions and 2 deletions
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man7/tcp.7
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@ -840,9 +840,23 @@ For recommended alternatives see
and
.IR tcp_abort_on_overflow .
.TP
.IR tcp_timestamps " (Boolean; default: enabled; since Linux 2.2)"
.IR tcp_timestamps " (integer; default: 1; since Linux 2.2)"
.\" Since 2.1.36
Enable RFC\ 1323 TCP timestamps.
Set to one of the following values to enable or disable RFC\ 1323
TCP timestamps:
.RS
.IP 0 3
Disable timestamps.
.IP 1
Enable timestamps as defined in RFC1323 and use random offset for
each connection rather than only using the current time.
.IP 2
As for the value 1, but without random offsets.
.\" commit 25429d7b7dca01dc4f17205de023a30ca09390d0
Setting
.I tcp_timestamps
to this value is meaningful since Linux 4.10.
.RE
.TP
.IR tcp_tso_win_divisor " (integer; default: 3; since Linux 2.6.9)"
This parameter controls what percentage of the congestion window