From owner-freebsd-stable@FreeBSD.ORG  Mon Aug  4 18:29:32 2008
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: stable@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 3FA131065673;
	Mon,  4 Aug 2008 18:29:32 +0000 (UTC)
	(envelope-from uspoerlein@gmail.com)
Received: from acme.spoerlein.net (cl-43.dus-01.de.sixxs.net
	[IPv6:2a01:198:200:2a::2])
	by mx1.freebsd.org (Postfix) with ESMTP id A63F78FC0C;
	Mon,  4 Aug 2008 18:29:31 +0000 (UTC)
	(envelope-from uspoerlein@gmail.com)
Received: from roadrunner.spoerlein.net (e180128164.adsl.alicedsl.de
	[85.180.128.164])
	by acme.spoerlein.net (8.14.2/8.14.2) with ESMTP id m74ITS1w006180
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK);
	Mon, 4 Aug 2008 20:29:29 +0200 (CEST)
	(envelope-from uspoerlein@gmail.com)
Received: from roadrunner.spoerlein.net (localhost [127.0.0.1])
	by roadrunner.spoerlein.net (8.14.2/8.14.2) with ESMTP id
	m74INZte001552
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
	Mon, 4 Aug 2008 20:23:35 +0200 (CEST)
	(envelope-from uspoerlein@gmail.com)
Received: (from uqs@localhost)
	by roadrunner.spoerlein.net (8.14.2/8.14.2/Submit) id m74INZ66001551;
	Mon, 4 Aug 2008 20:23:35 +0200 (CEST)
	(envelope-from uspoerlein@gmail.com)
Date: Mon, 4 Aug 2008 20:23:35 +0200
From: Ulrich Spoerlein <uspoerlein@gmail.com>
To: Robert Watson <rwatson@FreeBSD.org>
Message-ID: <20080804182334.GA1480@roadrunner.spoerlein.net>
Mail-Followup-To: Robert Watson <rwatson@FreeBSD.org>, stable@FreeBSD.org
References: <20080803075744.GA1555@roadrunner.spoerlein.net>
	<alpine.BSF.1.10.0808031444280.85159@fledge.watson.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <alpine.BSF.1.10.0808031444280.85159@fledge.watson.org>
User-Agent: Mutt/1.5.18 (2008-05-17)
Cc: stable@FreeBSD.org
Subject: Re: ddb(4) scripts not working in RELENG_7?
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 04 Aug 2008 18:29:32 -0000

Hi Robert,

On Sun, 03.08.2008 at 14:49:00 +0100, Robert Watson wrote:
> On Sun, 3 Aug 2008, Ulrich Spoerlein wrote:
> > I was testing a patch and getting a panic (page fault while in kernel mode) 
> > in RELENG_7 running multiuser mode, but no scripts were automagically run, 
> > although I configured ddb_enable=YES in rc.conf.
> >
> > It simply dropped me to the interactive ddb(4) prompt, nothing more. Do you 
> > have any idea what I could be missing?
> 
> I have been using DDB scripts on 7-STABLE without any problems, but I'm not 
> sure I've tried it with a page fault, just regular panics.  Could you try 
> entering the debugger via "sysctl debug.kdb.panic=1", which forces a panic, 
> and see if your scripts run then?  Perhaps there's some inconsistency in how 
> we're entering the debugger.  If things still appear not to be happening, try 
> setting up a kdb.enter.default script and see if that works?

Spot on! Entering via sysctl works as expected; the 'default' script
will also be executed after a page fault, but not the panic-script.

So either page faults should call the panic-script or some sort of
kdb.enter.pfault should be introduced? Either way, I see another manpage
update coming up :)

Cheers,
Ulrich Spoerlein
-- 
It is better to remain silent and be thought a fool,
than to speak, and remove all doubt.