From cb4975dfbe30e799c95eed59b1d702e9893c985a Mon Sep 17 00:00:00 2001 From: Michael Kerrisk Date: Mon, 22 May 2017 14:11:07 +0200 Subject: [PATCH] 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 --- man7/tcp.7 | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/man7/tcp.7 b/man7/tcp.7 index 94ab35608..e654f0242 100644 --- a/man7/tcp.7 +++ b/man7/tcp.7 @@ -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