Subject: Re: COMPAT_42 (was Re: dumping options TCP_COMPAT_42)
To: Rui Paulo <>
From: Thor Lancelot Simon <>
List: tech-kern
Date: 11/12/2006 20:35:48
On Mon, Nov 13, 2006 at 01:01:45AM +0000, Rui Paulo wrote:
> On Nov 10, 2006, at 11:18 PM, Perry E. Metzger wrote:
> >
> >I'd like to yank the support for TCP_COMPAT_42 out of our tree -- I
> >doubt that there is any legitimate user of the option any
> >longer. 4.2BSD was more than 20 years ago at this point.
> >
> >Absent any groundswell of supporters for TCP_COMPAT_42 I'll be
> >removing it from the tree in a couple of days.
> On a side note, I'm going to remove COMPAT_42 (note, not  
> TCP_COMPAT_42) code if no one objects. It's not on our kernel config  
> files, it's not on options(4).
> I've checked 386BSD source and they don't even add COMPAT_42 to the  
> GENERICISA config file, so this is dead code for more than a decade.

It is still useful with the Vax port -- and, more importantly, because
Ultrix just about _is_ 4.2BSD, killing it will have little actual effect
unless you also kill COMPAT_ULTRIX.