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Date: Wed, 6 May 2009 01:07:23 +0400
From: Eygene Ryabinkin <rea-fbsd@codelabs.ru>
To: Renato Botelho <rbgarga@gmail.com>
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Cc: Giorgos Keramidas <keramida@ceid.upatras.gr>, freebsd-current@freebsd.org,
	Paul Stewart <paul@paulstewart.org>
Subject: Re: 7.1 to 7.2 upgrade question
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Renato,

Tue, May 05, 2009 at 04:55:15PM -0300, Renato Botelho wrote:
> On Tue, May 5, 2009 at 2:53 PM, Giorgos Keramidas
> <keramida@ceid.upatras.gr> wrote:
> > If you don't need local patches or a custom kernel, and you can use the
> > GENERIC kernel configured to match your hardware setup, then it probably
> > makes a lot of sense to use freebsd-update. šIt will usually be much
> > faster than compiling everything from source.
> 
> I don't know if it's officially supported, but I did an hybrid upgrade
> using freebsd-update for the base and building the custom kernel
> from sources, it worked fine and is still much faster than build
> everything.

In principle, you can run into some errors, like KVM size mismatches
(and other ABI changes) if your kernel (that you build from sources) and
updated base will differ.  But you'll immediately notice it ;))  And for
most cases such way should work fine.

My two cents.
-- 
Eygene
 _                ___       _.--.   #
 \`.|\..----...-'`   `-._.-'_.-'`   #  Remember that it is hard
 /  ' `         ,       __.--'      #  to read the on-line manual
 )/' _/     \   `-_,   /            #  while single-stepping the kernel.
 `-'" `"\_  ,_.-;_.-\_ ',  fsc/as   #
     _.-'_./   {_.'   ; /           #    -- FreeBSD Developers handbook
    {_.-``-'         {_/            #