From owner-freebsd-current@FreeBSD.ORG  Sun Jan  4 06:50:21 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 3A58016A4CE
	for <current@FreeBSD.org>; Sun,  4 Jan 2004 06:50:21 -0800 (PST)
Received: from email02.aon.at (WARSL402PIP7.highway.telekom.at [195.3.96.94])
	by mx1.FreeBSD.org (Postfix) with SMTP id C1EDC43D1F
	for <current@FreeBSD.org>; Sun,  4 Jan 2004 06:50:18 -0800 (PST)
	(envelope-from shoesoft@gmx.net)
Received: (qmail 29336 invoked from network); 4 Jan 2004 14:50:17 -0000
Received: from n755p030.dipool.highway.telekom.at (HELO ?212.183.104.94?)
	([212.183.104.94]) (envelope-sender <shoesoft@gmx.net>)
	by qmail2rs.highway.telekom.at (qmail-ldap-1.03) with SMTP
	for <truckman@FreeBSD.org>; 4 Jan 2004 14:50:17 -0000
From: Stefan Ehmann <shoesoft@gmx.net>
To: Don Lewis <truckman@FreeBSD.org>
In-Reply-To: <200401030401.i0341O7E003439@gw.catspoiler.org>
References: <200401030401.i0341O7E003439@gw.catspoiler.org>
Content-Type: text/plain
Message-Id: <1073227819.1764.13.camel@shoeserv.freebsd>
Mime-Version: 1.0
X-Mailer: Ximian Evolution 1.4.5 
Date: Sun, 04 Jan 2004 15:50:20 +0100
Content-Transfer-Encoding: 7bit
cc: current@FreeBSD.org
Subject: Re: page fault panic tracked down (selwakeuppri())
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: Sun, 04 Jan 2004 14:50:21 -0000

On Sat, 2004-01-03 at 05:01, Don Lewis wrote:
> I wouldn't rule out the dsp, since you audio player software may be
> calling select() on the fd for the audio device.  You might want to back
> out Bruce's quick hack and change the second argument to selwakeuppri()
> to -1 in chn_wakeup() in dev/sound/pcm/channel.c.
> 
> Is your kernel compiled with the INVARIANTS and INVARIANTS_SUPPORT
> options?
> 
> Something else that I noticed is that the CHN_LOCKASSERT macro has an
> empty definition in dev/sound/pcm/channel.h.  You might want to try
> defining it as
> 	mtx_assert((struct mtx *)((c)->lock), MA_OWNED)
> 
> I still don't see any obvious cause for this problem.

I took out the debug options because it was just too slow. Put back
INVARIANTS (but no WITNESS) now and speed is nice again.

Applied your suggested changes which resulted in a panic. No
assertations were triggered though.