Possible Error in the FreeBSD 10.2 Release Notes/Man page for TCP

[Glen Barber]

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

Thank you for confirming.  I'll update the 10.2-RELEASE errata
accordingly.

What should the proper sysctls be, for completeness?

Glen

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