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Re: port-i386/42966: kernel built from today's netbsd-5 crashes

The following reply was made to PR port-i386/42966; it has been noted by GNATS.

From: David Holland <>
Subject: Re: port-i386/42966: kernel built from today's netbsd-5 crashes
Date: Wed, 17 Mar 2010 19:19:41 +0000

 On Wed, Mar 17, 2010 at 09:50:05AM +0000, Anne Bennett wrote:
  >  I can certainly try that (probably tomorrow), but I'd like to add
  >  that I didn't just add DIAGNOSTIC when I updated the kernel; that
  >  option was in force on my 5.0.1 kernel and did not cause a problem.
  >  I'm concerned that just turning off DIAGNOSTIC will simply mask a
  >  problem; I hope that the bug can actually be found and squashed.
 Turning off DIAGNOSTIC will, however, make your machine run a lot
 faster. (Once upon a time, DIAGNOSTIC was supposed to be cheap and
 only DEBUG was expensive; however, that's no longer true.)
  >  Weird.  I wonder if it's some kind of clue that the oddities I saw
  >  happened with the *old* kernel, but booted by name "/netbsd.old";
  >  I'm somewhat ignorant of how this works, but could something be
  >  being picked up from "/netbsd" (the new kernel) even when this is
  >  not the booted kernel?
 Nothing of importance should be. (Stuff like crash dump tools might
 look at /netbsd by default, but that shouldn't be relevant.)
 Was the weirdness you saw repeatable, or persist after a hard reset or
 power cycle? If it just happened once after you had the kernel problem
 it's quite possible that the bad kernel left the machine in a strange
 Does anyone know if the DIAGNOSTIC + intel graphics thing happens in
 current or 5.0_STABLE?
 David A. Holland

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