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Date: Fri, 24 Feb 2006 21:01:10 -0500
From: Kris Kennaway <kris@obsecurity.org>
To: Brad Waite <freebsd@wcubed.net>
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Cc: freebsd-stable@freebsd.org, Kris Kennaway <kris@obsecurity.org>
Subject: Re: 5.4-STABLE hangs every few days
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On Fri, Feb 24, 2006 at 06:59:17PM -0700, Brad Waite wrote:
> Kris Kennaway wrote:
> >On Fri, Feb 24, 2006 at 06:47:49PM -0700, Brad Waite wrote:
> >>Hi all,
> >>
> >>Been having problems with my Tyan Thunder i7500 (S2720) dual Xeon=20
> >>running -STABLE: it's hanging every couple of days.
> >>
> >>I couldn't find any specific fixes on the lists, but I did come across=
=20
> >>some instructions about breaking into the debugger from a serial=20
> >>console.  I built a kernel with the following options: DDB, KDB, WITNES=
S=20
> >>& BREAK_TO_DEBUGGER (INVARIANTS wouldn't build).
> >
> >Perhaps you forgot INVARIANT_SUPPORT.
>=20
> Thanks, Kris.  I didn't know I needed it (just going by some=20
> instructions on the list).  What does INVARIANTS do, anyway?  Will it=20
> help troubleshoot this problem?

Yes, it enables lots of runtime checks, so it's quite important when
trying to diagnose kernel problems.

Kris

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