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Date:      26 Feb 2003 14:04:28 -0500
From:      Lowell Gilbert <freebsd-questions-local@be-well.no-ip.com>
To:        freebsd-questions@freebsd.org
Subject:   Re: 4.7 Upgrade issue
Message-ID:  <44lm02kgn7.fsf@be-well.ilk.org>
In-Reply-To: <20030226151622.GF55640@catflap.home.slightlystrange.org>
References:  <20030226144352.5202D43FBD@mx1.FreeBSD.org> <20030226145024.GE55640@catflap.home.slightlystrange.org> <200302261659.53407.will@unfoldings.net> <20030226151622.GF55640@catflap.home.slightlystrange.org>

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Daniel Bye <dan@slightlystrange.org> writes:

> Agreed, but in this context, I think we are talking about running the
> disparate kernel and world, in either event, only as long as it takes to get
> both parts, the new kernel and the new world, installed.  Surely, an old
> world on a new kernel will have the exact same problems (or the exact
> opposite problems?), in that newly-built programs such as ps and top may
> have been altered to take account of new kernel memory structures etc, which
> won't be available until the new kernel is installed and booted.
> 
> Anyone who is up to using buildworld should have enough understanding to
> know that you have to build and install both parts for your system to work
> properly.

Yes, *assuming* everything goes fine, either method works equally well.

The difference is what you can do if something goes wrong.  If you are
running a new kernel on an old world, you can reboot with your old
kernel, but if you're running an old kernel on a new world when things
blow up, you're hosed, and have to start installing from clean media.


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