From owner-freebsd-current@FreeBSD.ORG  Wed Jan 14 15:36:34 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 19F9116A4CE
	for <current@FreeBSD.org>; Wed, 14 Jan 2004 15:36:34 -0800 (PST)
Received: from email07.aon.at (WARSL402PIP8.highway.telekom.at [195.3.96.97])
	by mx1.FreeBSD.org (Postfix) with SMTP id 9E72D43D80
	for <current@FreeBSD.org>; Wed, 14 Jan 2004 15:36:24 -0800 (PST)
	(envelope-from shoesoft@gmx.net)
Received: (qmail 64152 invoked from network); 14 Jan 2004 23:36:23 -0000
Received: from m106p013.dipool.highway.telekom.at (HELO ?62.46.3.45?)
	([62.46.3.45]) (envelope-sender <shoesoft@gmx.net>)
	by 172.18.5.236 (qmail-ldap-1.03) with SMTP
	for <truckman@FreeBSD.org>; 14 Jan 2004 23:36:23 -0000
From: Stefan Ehmann <shoesoft@gmx.net>
To: Don Lewis <truckman@FreeBSD.org>
In-Reply-To: <200401142128.i0ELSV7E040495@gw.catspoiler.org>
References: <200401142128.i0ELSV7E040495@gw.catspoiler.org>
Content-Type: text/plain
Message-Id: <1074123385.733.11.camel@shoeserv.freebsd>
Mime-Version: 1.0
X-Mailer: Ximian Evolution 1.4.5 
Date: Thu, 15 Jan 2004 00:36:26 +0100
Content-Transfer-Encoding: 7bit
cc: current@FreeBSD.org
Subject: Re: sound/pcm/* bugs (was: Re: page fault panic tracked down
	(selwakeuppri()) - really sound/pcm/*)
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: Wed, 14 Jan 2004 23:36:34 -0000

On Wed, 2004-01-14 at 22:28, Don Lewis wrote:
> On 14 Jan, Stefan Ehmann wrote:
> > That seems to fix it - boots fine now.
> > 
> > Looks like we need some further locks. When I try to set vchans to 4
> > with sysctl I get a similar panic.
> > 
> > panic: mutex pcm0:play:0 not owned at
> > /usr/src/sys/dev/sound/pcm/channel.c:706
> > 
> > #15 0xc04e5b57 in panic () at /usr/src/sys/kern/kern_shutdown.c:550
> > #16 0xc04dc4fc in _mtx_assert (m=0xc37ba280, what=0, 
> >     file=0xc07ee3e9 "/usr/src/sys/dev/sound/pcm/channel.c", line=706)
> >     at /usr/src/sys/kern/kern_mutex.c:673
> > #17 0xc07e436f in chn_reset (c=0x2c2, fmt=268435472)
> >     at /usr/src/sys/dev/sound/pcm/channel.c:706
> > #18 0xc07ed1fa in vchan_create (parent=0xc37a8880)
> >     at /usr/src/sys/dev/sound/pcm/vchan.c:273
> 
> Sigh ... I had hoped that your earlier testing had meant that locking
> code was clean.  Here's another patch, but I won't guarantee that you
> won't run into more lock assertion problems.  I guess that I should set
> up some sound hardware here so that I can actually test some of this
> stuff.

This time the system survived sysctl but as soon as sound playback
starts the assertion in channel.c:978 gets triggered.

Looks like setting up sound would be a good idea since there are
probably more traps ahead.