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Date: Mon, 05 Sep 2011 17:45:36 -0700
From: Doug Barton <dougb@FreeBSD.org>
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To: Arnaud Lacombe <lacombar@gmail.com>
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Cc: freebsd-net@freebsd.org, Adrian Chadd <adrian@freebsd.org>
Subject: Re: No IPFW binary compat across versions ?
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On 09/05/2011 17:18, Arnaud Lacombe wrote:
> From my point of view, I should be able to run a FreeBSD 9.0 kernel
> (when released) on top of a FreeBSD 5 userland without such issues.

Unfortunately your expectation is completely unrealistic. We do our best
to maintain backward compatibility but sometimes improvements require
breaking the KBI/ABI.

Also, we have never supported running a kernel from RELENG_N on anything
older than the latest version of RELENG_{N-1}.


hth,

Doug

-- 

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			-- OK Go

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