From owner-freebsd-hackers@FreeBSD.ORG  Mon Feb 23 18:55:37 2004
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id ED7F316A4CE
	for <freebsd-hackers@freebsd.org>;
	Mon, 23 Feb 2004 18:55:37 -0800 (PST)
Received: from web10503.mail.yahoo.com (web10503.mail.yahoo.com
	[216.136.130.153])
	by mx1.FreeBSD.org (Postfix) with SMTP id 9D99443D31
	for <freebsd-hackers@freebsd.org>;
	Mon, 23 Feb 2004 18:55:37 -0800 (PST)
	(envelope-from b_oshea@yahoo.com)
Message-ID: <20040224025537.18179.qmail@web10503.mail.yahoo.com>
Received: from [24.6.211.6] by web10503.mail.yahoo.com via HTTP;
	Mon, 23 Feb 2004 18:55:37 PST
Date: Mon, 23 Feb 2004 18:55:37 -0800 (PST)
From: Brian O'Shea <b_oshea@yahoo.com>
To: Brian O'Shea <b_oshea@yahoo.com>,
	Mathew Kanner <mat@cnd.mcgill.ca>
In-Reply-To: <20040223071419.20286.qmail@web10506.mail.yahoo.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
cc: Hackers FreeBSD <freebsd-hackers@freebsd.org>
Subject: Re: 5.2.1-RC hangs occasionally when sound files are played using
	the pcm driver
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 24 Feb 2004 02:55:38 -0000

--- Brian O'Shea <b_oshea@yahoo.com> wrote:
> --- Mathew Kanner <mat@cnd.mcgill.ca> wrote:
> > 
> > 	Hello Brian,
> > 	Don Lewis commited changes to the 5.2- tree on 2/14.  Could
> > you update and try again, also please do run with witness and
> > invariants, and if possible try to get a crashdump so we can see
> > what's happening.
> 
> Sure.  I'll try to reproduce it with witness and invariants first, just
> to avoid changing too many conditions at the same time.  Failing that,
> I'll update to the latest 5.2 tree and see if the problem goes away.

makeoptions     DEBUG=-g                #Build kernel with gdb(1) debug symbols
options         INVARIANTS              #Enable calls of extra sanity checking
options         INVARIANT_SUPPORT       #Extra sanity checks of internal
structures, required by INVARIANTS
options         WITNESS                 #Enable checks to detect deadlocks and
cycles
#options        WITNESS_SKIPSPIN        #Don't run witness on spinlocks for
speed

Ok, the problem seems to happen much more reliably now, but still no
panic (so no crash dump).  However, I did notice that for some reason
I had built an SMP kernel.  All kernels that I have seen exhibit this pcm
driver hang were apparently SMP kernels...I guess that's the default
in GENERIC, which I copied and adapted for my kernel config.  As my system
only has one CPU, I will build a UP kernel and see if that has any
effect.

Thanks,
-brian


__________________________________
Do you Yahoo!?
Yahoo! Mail SpamGuard - Read only the mail you want.
http://antispam.yahoo.com/tools