freebsd stable - Jun 2009 - Kernel Debugging Options

Hello everyone

I have a two-part question:

I have a minimally customized GENERIC kernel, with the only changes being:
options         KDB
options         KDB_UNATTENDED
options         DDB

and 'sysctl debug.debugger_on_panic' shows:
debug.debugger_on_panic: 0

However, after a panic loading the vboxdrv.ko module, the machine did
not reboot automatically after reboot.

Here are my questions:
1)  Would enabling DDB in the kernel prevent an automatic reboot after a panic?

2)  Does the debugger wait for XX seconds of console inactivity before
rebooting?  I was under the impression from the handbook that the
machine would instantly reboot and after dumping the crash to vmcore0.
 Is this assumption incorrect?

Thanks in advance for any input.

-- 
Glen Barber
http://www.dev-urandom.com
http://www.linkedin.com/in/glenjbarber

On Sat, Jun 6, 2009 at 9:16 AM, Glen Barber<glen.j.barber@gmail.com>
wrote:
> Hello everyone
>
> I have a two-part question:
>
> I have a minimally customized GENERIC kernel, with the only changes being:
> options ? ? ? ? KDB
> options ? ? ? ? KDB_UNATTENDED
> options ? ? ? ? DDB
>
> and 'sysctl debug.debugger_on_panic' shows:
> debug.debugger_on_panic: 0
>
> However, after a panic loading the vboxdrv.ko module, the machine did
> not reboot automatically after reboot.
I meant "automatically after panic".  It's early, and I am
apparently
unable to type a coherent thought...
>
> Here are my questions:
> 1) ?Would enabling DDB in the kernel prevent an automatic reboot after a
panic?
>
> 2) ?Does the debugger wait for XX seconds of console inactivity before
> rebooting? ?I was under the impression from the handbook that the
> machine would instantly reboot and after dumping the crash to vmcore0.
> ?Is this assumption incorrect?
>
> Thanks in advance for any input.
>
Also, if this is helpful, the userland / kernel are from two days ago, r193481:

FreeBSD orion 7.2-STABLE FreeBSD 7.2-STABLE #0 r193481: Fri Jun  5
01:55:06 EDT 2009     root@orion:/usr/obj/usr/src/sys/ORION  i386


-- 
Glen Barber
http://www.dev-urandom.com
http://www.linkedin.com/in/glenjbarber