Re: [amd64] Instability worse than ever

From: Brian Fundakowski Feldman <green_at_freebsd.org>
Date: Sat, 24 Jul 2004 23:53:15 -0400
On Sat, Jul 24, 2004 at 08:33:57PM -0500, Conrad J. Sabatier wrote:
> 
> On 25-Jul-2004 Scott Long wrote:
> > Conrad J. Sabatier wrote:
> > 
> >> For the last couple of days, my amd64 box has taken to spontaneously
> >> rebooting.  No panic, no coredump, nothing in logs, just reboots.
> >> 
> >> These always seem to occur just as I'm clicking on something under
> >> GNOME.
> >> 
> >> Very mysterious!
> >> 
> > 
> > Do you have INVARIANTS turned on?
> 
> No, I really should do that.  Don't know why I hadn't already.  Duh. 
> :-)
> 
> > If you do, would you be able to
> > hook up a serial console and see what the kernel is saying?
> 
> Been meaning to ask about that.  Would a null modem connection from my
> other machine be useable as the serial console?  I have all the kernel
> config options and the sio flags set to enable the serial console, but
> wasn't sure if that would work or not.  If so, I could try that.

Absolutely; I just set this up a few days ago, so I know this works with
-CURRENT.  First, set the sio.0.flags hint in /boot/device.hints to
"0x90" so it is a vailable for use as a serial console.  Then, set up
the kernel with DDB and KDB and set /etc/sysctl.conf to turn the
debug.debugger_on_panic switch to 1.  You should probably be running with
at least WITNESS and INVARIANTS, but not necessarily DIAGNOSTIC.

-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green_at_FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\
Received on Sun Jul 25 2004 - 01:53:17 UTC

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