panic: _sx_xlock_hard: recursed on non-recursive sx newbus

[Robert Watson]

On Sun, 16 Aug 2009, Marc UBM wrote:

> While loading snd_hda for fun on my fileserver, I got the following panic 
> (crashdump available for poking around):
>
> panic: _sx_xlock_hard: recursed on non-recursive sx newbus @ 
> /usr/src/sys/kern/subr_bus.c:219
>
> Backtrace is attached.

Hi Marc--

This is most likely associated with the known "newbus" locking issues from 
late-break MPSAFEty work on newbus for 8.0.  I understand that Attilio is 
working actively on fixing this (CC'd).

Robert