making SCTP loadable and removing it from GENERIC

[Michael Tuexen]

> On 9. Jul 2020, at 19:02, Mark Johnston <markj at freebsd.org> wrote:
> 
> On Thu, Jul 09, 2020 at 11:36:34PM +0700, Eugene Grosbein wrote:
>> 09.07.2020 22:41, Michael Tuexen wrote:
>> 
>>>> I am wondering if anyone has any objections to or concerns about this
>>>> proposal.  Any feedback is appreciated.
>> 
>> I'm for it.
>> 
>>> maybe it is acceptable to document user visible changes. This could include
>>> * parameter tunings in /etc/sysctl.conf are only applied if the SCTP module
>>>  is loaded from /etc/loader.conf.
>> 
>> You mean /boot/loader.conf.
>> 
>> This may be relaxed with "sctp_enable" knob for /etc/rc.conf and new startup script
>> /etc/rc.d/sctp that: a) REQUIRE: kld; b) checks if sctp.ko already loaded and load it as needed;
>> c) applies sctp sysctl tuning from /etc/sysctl.conf for values that differ.
> 
> Michael and I talked about this a bit in the past.  I propose a more
> general solution, since it is a problem not just for SCTP:
> https://reviews.freebsd.org/D25601

That seems like a perfect solution for the problem!

Best regards
Michael