Re: Netbsd v 8.0 fails to boot on spare ultra 45

["Michael L. Hitch" <mhitch%NetBSD.org@localhost>]

On Sat, 22 Dec 2018, Jerome Ibanes wrote:

> Could you try a GENERIC.UP kernel and/or disable the audio driver?
>
> Thank you,
> Jerome

  I haven't tried GENERIC.MP, but I have effectively disabled the audio 
driver (forced the code to never match - quicker than removing it from 
the config and rebujilding the entire kernel).  It is able to boot after 
that, although I didn't run that kernel very long.

  I was able to track a specific commit of audio.c that starts crashing.

/*      $NetBSD: audio.c,v 1.335 2017/05/06 00:13:25 nat Exp $  */
  This one boots.

/*      $NetBSD: audio.c,v 1.337 2017/05/08 07:31:34 martin Exp $       */
  This one crashes with SIR.

  I can't see any reason why that change would cause this.  I'm starting 
to suspect the problem is acually elsewhere and that one change just 
causes the real problem to consistently occur.

  I was trying to see how far the audio attach got on a current netbsd-8 
tree, and got to a point where kmem_zalloc() is called, but never 
returned.  With the tree I used to locate the audio.c commuit that fails, 
it appears to get much further in the audio attach code before is fails.

  One other possibly related problem is that a few times I had sshd fault 
on startup on boot.  I wasn't paying much attention to which kernel that 
was at the time.

Mike

---
Michael L. Hitch                        mhitch%montana.edu@localhost
Operations Consulting,  University Information Technology
Montana State University, Bozeman, MT     USA