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Date:      Sun, 27 Sep 1998 07:52:39 +1000 (EST)
From:      John Birrell  <jb@cimlogic.com.au>
To:        peter@netplex.com.au (Peter Wemm)
Cc:        jb@cimlogic.com.au, Studded@dal.net, current@FreeBSD.ORG
Subject:   Re: Upgrade documentation (Was: Re: Make world error on -current elf)
Message-ID:  <199809262152.HAA21507@cimlogic.com.au>
In-Reply-To: <199809261432.WAA08035@spinner.netplex.com.au> from Peter Wemm at "Sep 26, 98 10:32:30 pm"

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Peter Wemm wrote:
> I am still not quite comfortable with the 3.0-CURRENT -> elf conversion
> process.
> 
> The instructions there and the Makefile.upgrade rules push towards an 
> unneded recompile and reboot of a kernel in order to complete the process.
> 
> Any 3.0-CURRENT kernel from about July 1997 (over a year old) will run an
> ELF world quite happily.  IMHO, defaulting to unecessarily replacing the
> user's customized kernel with a generic one is bad karma.

I doubt that you've tested that. Sure, it may be able to load elf format
executables, but there have been so many other changes that affect
compatibility between user-land and the kernel. My approach to this sort
of thing is: "if it's not tested, then it doesn't work". The upgrade
procedure is for the 95% of people who need a procedure that "just works".
Of the other 5%, most are prepared to install a current kernel prior to
doing the upgrade.

Changing the kernel compatibility test would introduce the possibility
that things might not work correctly when the user reboots. This is a
serious issue because it can hose people. I don't want to have to deal
with the support problems that would cause. As it stands, a lot of
people have used the current procedure to upgrade, even in the midst of
major changes to current.

-- 
John Birrell - jb@cimlogic.com.au; jb@freebsd.org http://www.cimlogic.com.au/
CIMlogic Pty Ltd, GPO Box 117A, Melbourne Vic 3001, Australia +61 418 353 137

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