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Date:      Wed, 10 Mar 1999 12:22:17 -0500 (EST)
From:      Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
To:        Dan Swartzendruber <druber@kersur.net>
Cc:        freebsd-current@FreeBSD.ORG
Subject:   Re: panic: zone: entry not free
Message-ID:  <199903101722.MAA27037@khavrinen.lcs.mit.edu>
In-Reply-To: <Pine.BSF.3.96.990310120204.26880B-100000@mail.kersur.net>
References:  <199903101649.LAA26851@khavrinen.lcs.mit.edu> <Pine.BSF.3.96.990310120204.26880B-100000@mail.kersur.net>

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<<On Wed, 10 Mar 1999 12:03:00 -0500 (EST), Dan Swartzendruber <druber@kersur.net> said:

> No, but I didn't think that was what we were talking about.  I thought
> we were talking about assertions.

We were talking about invariants, which document the conditions which
nearby code expect and/or cause.  To actually check these conditions
in a production system is a waste of CPU power; their function is to
define for the developers precisely what the expected outcome of a
particular operation is, so that new bugs are not introduced when code
is modified.

-GAWollman

--
Garrett A. Wollman   | O Siem / We are all family / O Siem / We're all the same
wollman@lcs.mit.edu  | O Siem / The fires of freedom 
Opinions not those of| Dance in the burning flame
MIT, LCS, CRS, or NSA|                     - Susan Aglukark and Chad Irschick


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