From owner-freebsd-stable@freebsd.org Wed Aug 12 22:43:41 2015 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id E65739A03C2 for ; Wed, 12 Aug 2015 22:43:40 +0000 (UTC) (envelope-from gjb@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:1900:2254:206c::16:87]) by mx1.freebsd.org (Postfix) with ESMTP id D43E0FE2; Wed, 12 Aug 2015 22:43:40 +0000 (UTC) (envelope-from gjb@FreeBSD.org) Received: from FreeBSD.org (freefall.freebsd.org [IPv6:2001:1900:2254:206c::16:87]) by freefall.freebsd.org (Postfix) with ESMTP id 5DFA9148D; Wed, 12 Aug 2015 22:43:40 +0000 (UTC) (envelope-from gjb@FreeBSD.org) Date: Wed, 12 Aug 2015 22:43:38 +0000 From: Glen Barber To: sbruno@freebsd.org Cc: freebsd-stable@freebsd.org Subject: Re: Possible Error in the FreeBSD 10.2 Release Notes/Man page for TCP Message-ID: <20150812224338.GC1460@FreeBSD.org> References: <131f8a0f25200031103639e969702727@dweimer.net> <20150812221546.GB1460@FreeBSD.org> <55CBCB91.9010301@ignoranthack.me> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="MnLPg7ZWsaic7Fhd" Content-Disposition: inline In-Reply-To: <55CBCB91.9010301@ignoranthack.me> X-Operating-System: FreeBSD 11.0-CURRENT amd64 X-SCUD-Definition: Sudden Completely Unexpected Dataloss X-SULE-Definition: Sudden Unexpected Learning Event X-PEKBAC-Definition: Problem Exists, Keyboard Between Admin/Computer User-Agent: Mutt/1.5.23 (2014-03-12) X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 12 Aug 2015 22:43:41 -0000 --MnLPg7ZWsaic7Fhd Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Aug 12, 2015 at 03:41:21PM -0700, Sean Bruno wrote: > On 08/12/15 15:15, Glen Barber wrote: > > On Wed, Aug 12, 2015 at 01:09:31PM -0500, dweimer wrote: > >> I was reading through the Release notes, and decided to enable=20 > >> net.inet.tcp.pmtud_blackhole_detection in my test environment. It > >> appears that the monitoring tunable > >> net.inet.tcp.pmtud_blackhole_min_activated is incorrectly listed. > >> Using sysctl -a | grep net.inet.tcp.pmtud, doesn't show it as a > >> result. The test system is running RC3 built on the 7th from=20 > >> revision 286391 of the https://svn.freebsd.org/base/releng/10.2 > >> tree. > >>=20 > >> root@freebsd:/usr/src # sysctl -a | grep net.inet.tcp.pmtud=20 > >> net.inet.tcp.pmtud_blackhole_mss: 1200=20 > >> net.inet.tcp.pmtud_blackhole_failed: 0=20 > >> net.inet.tcp.pmtud_blackhole_activated_min_mss: 0=20 > >> net.inet.tcp.pmtud_blackhole_activated: 0=20 > >> net.inet.tcp.pmtud_blackhole_detection: 1 > >>=20 > >> I did confirm that the pmtud_blackhole_min_activated option is > >> also listed in the tcp(4) man page page as well. > >>=20 > >> If anyone is more familiar with this than I am can they look into > >> seeing if there is indeed an error, or if I am missing something > >> here. > >>=20 > >=20 > > This appears to be an error based on the content of the commit > > log. I will confirm with the person that committed the code, and > > will note the findings in the 10.2-RELEASE errata document. > >=20 >=20 > This looks like I failed to MFC r276345 to stable 10 in order to > update tcp.4 leading to this confusion. >=20 Thank you for confirming. I'll update the 10.2-RELEASE errata accordingly. What should the proper sysctls be, for completeness? Glen --MnLPg7ZWsaic7Fhd Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJVy8waAAoJEAMUWKVHj+KTYeAQAI3pG0N8jUnATRtGRvrjIui2 4bhZuHdlMGRmSftudxVa5ObOmknG5JUroJ+DBi6P9S+3hixFThsHJ4enCywboQV8 9Ghf59bMCGqk9CiEHe0cH2aCD5355zoH89xwAhlMV4KDi8Y5bC9dtYoHMBrghuqs 4ku2Naia5NJHXNokweT8sj+jzAYzOGwBggeuHiJJH5CwjQl9marVidRj+AeMU4zo XAKXF1FttQm8lIoSQ6RNlfnPzg0fE6EccYJRQ6AMuU8XS55w1PQPkscfAJUuGlJA yZeGgEt9umMr53AsxB4pubIAAqLL+1pgiNJBdtmmkRvOVoVasj13aPEvvCSbLFmC O/jl7Zb4aJ3g931S1L4l0cTv3babVZjHJXZmpypymPhL9qVozuRSae4wXOgLXB3T cQK+kHlXvJaa4E4XSJELpnzS3LrtMc5VA1Mll7jM6qCQyIe+J8VBZkymHNXTqxXa hc1NAxfbMsgtgEK/kACDMiIU0ZL3X43SV946taDvrO1FuvP+jTCimA88hEb+WMIK 8UMUoOPFaAPFVYD1til7XWEiizFHHx1orzayKXdUytFP8p34X+BnjpipX/ZUL6hn PhUluhB4PaXT5bppyPEwrFF1gsi5LHq9w4mKmVgAplXl5zXWyA8lZNhKm8LOdOwR r1HImfoKMJlOc7kn2bhg =TkAM -----END PGP SIGNATURE----- --MnLPg7ZWsaic7Fhd--