Manuel Bouyer writes:

> > Then system went to DDB showing "WARNING: SPL NOT LOWERED ON SYSCALL
> > EXIT".  I continue on DDB's prompt, ipnat(8) shows the message bellow.
> 
> If you can reproduce this could you type 'tr' at the db prompt and send the
> backtrace ?
> This would help !

Most people have to do this by hand.  Wouldn't it be cool if there was
a small static circular buffer that could be read from kmem/core that
contained the output of ddb....