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Date:      10 Mar 1999 16:53:34 +0100
From:      Dag-Erling Smorgrav <des@flood.ping.uio.no>
To:        Matthew Dillon <dillon@apollo.backplane.com>
Cc:        "Daniel C. Sobral" <dcs@newsguy.com>, Jos Backus <Jos.Backus@nl.origin-it.com>, Dmitrij Tejblum <dima@tejblum.dnttm.rssi.ru>, perhaps@yes.no, freebsd-current@FreeBSD.ORG
Subject:   Re: panic: zone: entry not free
Message-ID:  <xzplnh57340.fsf@flood.ping.uio.no>
In-Reply-To: Matthew Dillon's message of "Thu, 25 Feb 1999 00:03:15 -0800 (PST)"
References:  <19990223094120.A97001@hal.mpn.cp.philips.com> <199902230909.MAA01169@tejblum.dnttm.rssi.ru> <19990223105939.D97001@hal.mpn.cp.philips.com> <36D329D1.73146EEF@newsguy.com> <199902250803.AAA01163@apollo.backplane.com>

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Matthew Dillon <dillon@apollo.backplane.com> writes:
>     I would disagree with that.  Invariants are for people who want
>     their data to be as safe as possible and don't mind eating a little
>     cpu doing extra sanity checks in the kernel.  It is something I would
>     almost certainly enable in a production kernel.

Uh, no. Invariants are for developers who want to make sure their code
is correct. There is no reason why an end user would want to build a
kernel with invariants enabled. Invariants will *not* increase data
safety. If they have any effect at all (i.e. if they actually catch a
bug), the result is a panic (whereas with a kernel without invariants,
the bug might actually go unnoticed).

You must be thinking of the FAILSAFE option.

DES
-- 
Dag-Erling Smorgrav - des@flood.ping.uio.no


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