From owner-freebsd-current@FreeBSD.ORG  Wed Feb 11 10:27:23 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 0200116A4CE
	for <current@freebsd.org>; Wed, 11 Feb 2004 10:27:23 -0800 (PST)
Received: from mail3.speakeasy.net (mail3.speakeasy.net [216.254.0.203])
	by mx1.FreeBSD.org (Postfix) with ESMTP id E02EB43D1D
	for <current@freebsd.org>; Wed, 11 Feb 2004 10:27:22 -0800 (PST)
	(envelope-from jhb@FreeBSD.org)
Received: (qmail 17772 invoked from network); 11 Feb 2004 18:27:22 -0000
Received: from dsl027-160-063.atl1.dsl.speakeasy.net (HELO server.baldwin.cx)
	([216.27.160.63])          (envelope-sender <jhb@FreeBSD.org>)
	encrypted SMTP
	for <current@freebsd.org>; 11 Feb 2004 18:27:22 -0000
Received: from 10.50.40.205 (gw1.twc.weather.com [216.133.140.1])
	by server.baldwin.cx (8.12.10/8.12.10) with ESMTP id i1BIRCM4094970;
	Wed, 11 Feb 2004 13:27:19 -0500 (EST)
	(envelope-from jhb@FreeBSD.org)
From: John Baldwin <jhb@FreeBSD.org>
To: des@des.no (Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?=),
	"Petr Holub" <hopet@ics.muni.cz>
Date: Wed, 11 Feb 2004 13:16:50 -0500
User-Agent: KMail/1.5.4
References: <02ad01c3f0a8$0a6578a0$2136fb93@kloboucek>
	<xzpad3pbtd6.fsf@dwp.des.no>
In-Reply-To: <xzpad3pbtd6.fsf@dwp.des.no>
MIME-Version: 1.0
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline
Message-Id: <200402111316.50941.jhb@FreeBSD.org>
X-Spam-Checker-Version: SpamAssassin 2.55 (1.174.2.19-2003-05-19-exp)
cc: current@freebsd.org
Subject: Re: storm of stray interrupts
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, 11 Feb 2004 18:27:23 -0000

On Wednesday 11 February 2004 09:09 am, Dag-Erling Sm=F8rgrav wrote:
> "Petr Holub" <hopet@ics.muni.cz> writes:
> > -su-2.05b# vmstat -i
> > interrupt                          total       rate
> > [...]
> > irq16: fwohci0                 416899230       2703
>
> There's definitely something wrong with your firewire controller.

Wrong, his BIOS just sucks and doesn't provide info on how to route drm0's=
=20
interrupt when using ACPI.  drm0 is routed to IRQ 16, but we end up using t=
he=20
ATPIC interrupt 11 to try and route it instead due to his broken BIOS.  Sin=
ce=20
PCI interrupts are level triggered, this means that as soon as drm0=20
interrupts, it storms on IRQ 16 since drm0's ISR never gets called.

=2D-=20
John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =3D  http://www.FreeBSD.org