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Date:      Wed, 12 Aug 2015 15:41:21 -0700
From:      Sean Bruno <sbruno@ignoranthack.me>
To:        freebsd-stable@freebsd.org
Subject:   Re: Possible Error in the FreeBSD 10.2 Release Notes/Man page for TCP
Message-ID:  <55CBCB91.9010301@ignoranthack.me>
In-Reply-To: <20150812221546.GB1460@FreeBSD.org>
References:  <131f8a0f25200031103639e969702727@dweimer.net> <20150812221546.GB1460@FreeBSD.org>

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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 
>> 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 
>> revision 286391 of the https://svn.freebsd.org/base/releng/10.2
>> tree.
>> 
>> root@freebsd:/usr/src # sysctl -a | grep net.inet.tcp.pmtud 
>> net.inet.tcp.pmtud_blackhole_mss: 1200 
>> net.inet.tcp.pmtud_blackhole_failed: 0 
>> net.inet.tcp.pmtud_blackhole_activated_min_mss: 0 
>> net.inet.tcp.pmtud_blackhole_activated: 0 
>> net.inet.tcp.pmtud_blackhole_detection: 1
>> 
>> I did confirm that the pmtud_blackhole_min_activated option is
>> also listed in the tcp(4) man page page as well.
>> 
>> 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.
>> 
> 
> 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.
> 
> Glen
> 


This looks like I failed to MFC r276345 to stable 10 in order to
update tcp.4 leading to this confusion.

sean
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