Date: Sun, 29 Mar 2020 15:43:00 +0000 (UTC) From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r359422 - head/share/man/man4 Message-ID: <202003291543.02TFh0TH020970@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: tuexen Date: Sun Mar 29 15:43:00 2020 New Revision: 359422 URL: https://svnweb.freebsd.org/changeset/base/359422 Log: Be a bit more precisly in the description of the sysctl variable net.inet.tcp.pmtud_blackhole_detection. Also remove three entries, which are not sysctl variables but statistic counters for TCP. Thanks to 0mp@ for suggesting an improvement. Reviewed by: bcr@ Sponsored by: Netflix, Inc. Differential Revision: https://reviews.freebsd.org/D24216 Modified: head/share/man/man4/tcp.4 Modified: head/share/man/man4/tcp.4 ============================================================================== --- head/share/man/man4/tcp.4 Sun Mar 29 06:48:59 2020 (r359421) +++ head/share/man/man4/tcp.4 Sun Mar 29 15:43:00 2020 (r359422) @@ -34,7 +34,7 @@ .\" From: @(#)tcp.4 8.1 (Berkeley) 6/5/93 .\" $FreeBSD$ .\" -.Dd December 2, 2019 +.Dd March 29, 2020 .Dt TCP 4 .Os .Sh NAME @@ -632,7 +632,12 @@ Turn on automatic path MTU blackhole detection. In case of retransmits OS will lower the MSS to check if it's MTU problem. If current MSS is greater than -configured value to try, it will be set to configured value, otherwise, +configured value to try +.Po Va net.inet.tcp.pmtud_blackhole_mss +and +.Va net.inet.tcp.v6pmtud_blackhole_mss +.Pc , +it will be set to this value, otherwise, MSS will be set to default values .Po Va net.inet.tcp.mssdflt and @@ -642,13 +647,6 @@ and MSS to try for IPv4 if PMTU blackhole detection is turned on. .It Va v6pmtud_blackhole_mss MSS to try for IPv6 if PMTU blackhole detection is turned on. -.It Va pmtud_blackhole_activated -Number of times configured values were used in an attempt to downshift. -.It Va pmtud_blackhole_activated_min_mss -Number of times default MSS was used in an attempt to downshift. -.It Va pmtud_blackhole_failed -Number of connections for which retransmits continued even after MSS -downshift. .It Va functions_available List of available TCP function blocks (TCP stacks). .It Va functions_default
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202003291543.02TFh0TH020970>