From owner-freebsd-current@FreeBSD.ORG  Sat Sep 11 21:18:44 2004
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id A733F16A4CF
	for <freebsd-current@FreeBSD.org>;
	Sat, 11 Sep 2004 21:18:44 +0000 (GMT)
Received: from gw.catspoiler.org (217-ip-163.nccn.net [209.79.217.163])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 51C4543D1D
	for <freebsd-current@FreeBSD.org>;
	Sat, 11 Sep 2004 21:18:44 +0000 (GMT)
	(envelope-from truckman@FreeBSD.org)
Received: from FreeBSD.org (mousie.catspoiler.org [192.168.101.2])
	by gw.catspoiler.org (8.12.11/8.12.11) with ESMTP id i8BLIT6f049447;
	Sat, 11 Sep 2004 14:18:33 -0700 (PDT)
	(envelope-from truckman@FreeBSD.org)
Message-Id: <200409112118.i8BLIT6f049447@gw.catspoiler.org>
Date: Sat, 11 Sep 2004 14:18:29 -0700 (PDT)
From: Don Lewis <truckman@FreeBSD.org>
To: mat@cnd.mcgill.ca
In-Reply-To: <20040826204822.GB670@cnd.mcgill.ca>
MIME-Version: 1.0
Content-Type: TEXT/plain; charset=us-ascii
cc: freebsd-current@FreeBSD.org
cc: tech2187@yahoo.com
Subject: Re: lor with sndstat (amd64)
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 11 Sep 2004 21:18:44 -0000

On 26 Aug, Mathew Kanner wrote:
> On Aug 26, K Chapman wrote:
>> running: amd64
>> 6.0-CURRENT FreeBSD 6.0-CURRENT #1: Wed Aug 25
>> 23:40:19 EDT
>> 
>> sound from kernel config:
>> device          sound
>> device          "snd_via8233"
>> 
>> noticed this on console ater cat /dev/sndstat :
>> lock order reversal
>>  1st 0xffffffff805d03e0 sndstat (sndstat) @
>> /usr/src/sys/dev/sound/pcm/sndstat.c:165
>>  2nd 0xffffff002b61e8f0 user map (user map) @
>> /usr/src/sys/vm/vm_map.c:2997
>> KDB: stack backtrace:
>> witness_checkorder() at witness_checkorder+0x654
>> _sx_xlock() at _sx_xlock+0x51
>> vm_map_lookup() at vm_map_lookup+0x44
>> vm_fault() at vm_fault+0xba
>> trap_pfault() at trap_pfault+0x111
>> trap() at trap+0x1b5
>> alltraps_with_regs_pushed() at
>> alltraps_with_regs_pushed+0x5
>> sndstat_read() at sndstat_read+0x8b
>> spec_read() at spec_read+0x1ea
>> vn_read() at vn_read+0x153
>> dofileread() at dofileread+0x9a
>> read() at read+0x68
>> syscall() at syscall+0x4b0
>> Xfast_syscall() at Xfast_syscall+0xa8
>> --- syscall (3, FreeBSD ELF64, read), rip =
>> 0x200689708, rsp = 0x7fffffffeab8, rbp =
>> 0x7fffffffedc4 ---
>> 
>> saw reports of a lor with sndstat at the end of last
>> year, but that seemed to have been resolved.  sound
>> seems fine however... plays cd's, mp3's ok.
> 
> 	Hello "K",
> 	I've never seen this one before, I'll take a look at this on
> the weekend, but since I don't have a 8233 or and AMD64 I may not find
> it.

I committed a fix for this yesterday: sys/dev/sound/pcm/sndstat.c rev
1.18.