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Date: Sun, 16 Aug 2009 19:50:03 +0100 (BST)
From: Robert Watson <rwatson@FreeBSD.org>
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To: Marc UBM <ubm.freebsd@googlemail.com>
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Cc: attilio@FreeBSD.org, current@freebsd.org
Subject: Re: panic: _sx_xlock_hard: recursed on non-recursive sx newbus
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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