Howto debug Kernel problems ? (jail -r -> freeze)

[Marius Strobl]

On Wed, Jan 25, 2012 at 04:09:40PM +0100, Denny Schierz wrote:
> 
> Am 25.01.2012 um 16:00 schrieb Marius Strobl:
> > 
> > Not that I'm aware of. Do you have a kernel built with options
> > BREAK_TO_DEBUGGER? Does it work when the machine doesn't hang
> 
> jupp, I have
> 
> > (you can resume via the "continue" command in the kernel
> 
> works too
> 
> > debugger)? Do you send the break via the "break" command of the
> > ALOM or by sending a break via a terminal attached to the ALOM
> > console?
> 
> 
> ssh alom -> login -> type break -> type console -f -> normal freebsd console 
> 
> but, It happens nothing. I expected to get into the kdb. 
> 

Ok, but breaking into the debugger only doesn't work when the
machine hangs de to a `jail -r`, otherwise it works?

Marius