From owner-freebsd-current@FreeBSD.ORG  Wed Sep 15 04:04:25 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 3BA5316A4CE; Wed, 15 Sep 2004 04:04:25 +0000 (GMT)
Received: from harmony.village.org (rover.village.org [168.103.84.182])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 7160443D58; Wed, 15 Sep 2004 04:04:24 +0000 (GMT)
	(envelope-from imp@bsdimp.com)
Received: from localhost (warner@rover2.village.org [10.0.0.1])
	by harmony.village.org (8.13.1/8.13.1) with ESMTP id i8F43HPw053629;
	Tue, 14 Sep 2004 22:03:17 -0600 (MDT)
	(envelope-from imp@bsdimp.com)
Date: Tue, 14 Sep 2004 22:04:01 -0600 (MDT)
Message-Id: <20040914.220401.112259787.imp@bsdimp.com>
To: rwatson@FreeBSD.org, phk@FreeBSD.org
From: "M. Warner Losh" <imp@bsdimp.com>
In-Reply-To: <Pine.NEB.3.96L.1040914212943.75935A-100000@fledge.watson.org>
References: <Pine.NEB.3.96L.1040914212943.75935A-100000@fledge.watson.org>
X-Mailer: Mew version 3.3 on Emacs 21.3 / Mule 5.0 (SAKAKI)
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
cc: current@FreeBSD.org
Subject: Re: fdc_worker panic in mtx_lock()
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, 15 Sep 2004 04:04:25 -0000

In message: <Pine.NEB.3.96L.1040914212943.75935A-100000@fledge.watson.org>
            Robert Watson <rwatson@FreeBSD.org> writes:
: Got this this evening -- Warner, looks like it might be yours.

Not mine.  phk's.  I'll take a look at it, however.

: Timecounters tick every 10.000 msec
: kernel trap 12 with interrupts disabled
: 
: 
: Fatal trap 12: page fault while in kernel mode
: cpuid = 0; apic id = 00
: fault virtual address   = 0x108
: fault code         = supervisor read, page not present
: instruction pointer     = 0x8:0xc060978d
: stack pointer           = 0x10:0xe94c4cb0
: frame pointer           = 0x10:0xe94c4cbc
: code segment       = base 0x0, limit 0xfffff, type 0x1b
:                    = DPL 0, pres 1, def32 1, gran 1
: processor eflags   = resume, IOPL = 0
: current process    = 99 (fdc0)
: [thread 100110]
: Stopped at      _mtx_lock_sleep+0xb9:   cmpl    $0x4,0x108(%ebx)
: db> trace
: _mtx_lock_sleep(c554ebb0,c549e000,0,0,0) at _mtx_lock_sleep+0xb9
: fdc_worker(c554eb00,c5541000,c077faf8,e94c4d34,c05fcd1d) at  fdc_worker+0x1ab
: fdc_thread(c554eb00,e94c4d48) at fdc_thread+0xe
: fork_exit(c077faf8,c554eb00,e94c4d48) at fork_exit+0x75
: fork_trampoline() at fork_trampoline+0x8
: --- trap 0x1, eip = 0, esp = 0xe94c4d7c, ebp = 0 ---
: 
: (gdb) l *fdc_worker+0x1ab
: 0xc077eecf is in fdc_worker (../../../dev/fdc/fdc.c:758).
: 753                     need_recal = 0xf;
: 754             }
: 755
: 756             /* Pick up a request, if need be wait for it */
: 757             if (fdc->bp == NULL) {
: 758                     mtx_lock(&fdc->fdc_mtx);
: 759                     do {
: 760                             fdc->bp = bioq_takefirst(&fdc->head);
: 761                             if (fdc->bp == NULL)
: 762                                     msleep(&fdc->head, &fdc->fdc_mtx,

I take you didn't try to unload fdc.ko?

Warner