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Date:      Wed, 9 Oct 2002 14:59:01 -0700
From:      Ted Faber <faber@ISI.EDU>
To:        Terry Lambert <tlambert2@mindspring.com>
Cc:        "Nelson, Trent ." <tnelson@switch.com>, "'hackers@freebsd.org'" <hackers@freebsd.org>, "'questions@freebsd.org'" <questions@freebsd.org>
Subject:   Re: FreeBSD usage in safety-critical environments
Message-ID:  <20021009215900.GC93282@pun.isi.edu>
In-Reply-To: <3DA482D6.F618F6C5@mindspring.com>
References:  <8F329FEDF58BD411BE5200508B10DA7607D71A10@exchptc1.switch.com> <3DA482D6.F618F6C5@mindspring.com>

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On Wed, Oct 09, 2002 at 12:26:14PM -0700, Terry Lambert wrote:
> Life support systems require formal proofs of correctness for code;
> since neither Linux nor FreeBSD is formally correct, in total, you
> would need to be insane to deplaoy either of them as, for example,
> a part of an air traffic control system.

I suspect that's a bad example, or that you mean an embedded aircraft
control system.  Ron Reisman and James Murphy gave a fine invited talk
at USENIX 02 (http://www.usenix.org/events/usenix02/tech/#11am) about
the growing number of UNIX components in the US ATC system.  I reject
the conclusion that the FAA is collectively insane for that reason.

----------------------------------------------------------------------
Ted Faber                                                faber@isi.edu
USC/ISI Computer Scientist                   http://www.isi.edu/~faber
(310) 448-9190         PGP Keys: http://www.isi.edu/~faber/pubkeys.asc

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