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Date:      Thu, 20 Jun 2002 13:45:43 -0700
From:      "Sam Leffler" <sam@errno.com>
To:        <freebsd-arch@freebsd.org>
Subject:   DIAGNOSTIC vs. INVARIANTS
Message-ID:  <124a01c2189b$72df9cd0$52557f42@errno.com>

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It seems #ifdef DIAGNOSTIC is not used uniformly in the kernel.
Specifically, it seems any code of the form:

#ifdef DIAGNOSTIC
    if (some check)
        panic("some check failed...");
#endif

should instead be controlled by INVARIANTS as in

    KASSERT(some check, ("some check failed..."));

I read DIAGNOSTIC to be intended to control inclusion of code that _prints
diagnostic messages_ or similar and not code that does consistency checks.

Comments?

    Sam


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