Re: Defaulting serial communication to 115200 bps for FreeBSD 14

On 8/17/23 00:40, Warner Losh wrote:
> On Wed, Aug 16, 2023, 9:38 PM Dennis Clarke <dclarke@blastwave.org> wrote:
> 
>> On 8/16/23 22:28, Alexander Motin wrote:
>>> On 16.08.2023 18:14, Dennis Clarke wrote:
>>>> The default serial communications config on most telecom equipment that
>>>> I have seen ( in the last forty years ) defaults to 9600 8n1. If people
>>>> want something faster from FreeBSD then do the trivial :
>>>>
>>>>       set comconsole_speed="115200"
>>>>       set console="comconsole"
>>>>
>>>> Is that not trivial enough?
>>>
>>> Except it is not a telecom equipment 40 years ago.  Even at 115200 that
>>> I routinely use on my development systems I feel serial console output
>>> affects verbose boot time and kernel console debugging output.  I also
>>> have BIOS console redirection enabled on my systems, and I believe the
>>> default there is also 115200, and even that is pretty slow.  I see no
>>> point to stay compatible if it is unusable.
>>>
>>
>> You seem to be missing the point.
>>
>> You need to make a configuration choice. You. Not the world. You.
>>
>> Edit your /boot/loader.conf and put in the lines above.
>>
>> Then be happy.
>>
>> --
>> Dennis Clarke
>> RISC-V/SPARC/PPC/ARM/CISC
>> UNIX and Linux spoken
>> GreyBeard and suspenders optional
>>
>> PS: a recent CISCO ASA fireware defaults to 9600 8n1. Same as a lot of
>>       equipment.
>>
> 
> Yes. Some tiny number of things has that as a default, an even larger
> number of things have a default of 115200 or even faster. And have had that
> default since the 90s. The whole point of defaults is that they reflect the
> needs of the most people. FreeBSD's defaults were already starting to be
> dated in 1.0...  today almost everyone changes the defaults to the new
> value we are advocating. This is to make FreeBSD more useful out of the box
> to more people. To turn your argument around: people wanting the old
> defaults can configure their systems easily enough. If we look purely at
> the numbers, vastly fewer people withh be inconvenienced at 115200 than at
> 9600. People can still use 9600... that's likely never going away... this
> is just a more sensible default.
> 
> Warner
> 

That makes perfect flawless sense to me. The logic of "popular" or "most
valuable" to the most users for something like this.  Yes I know that is
a dangling elliptical sentence but it works.


-- 
--
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken
GreyBeard and suspenders optional