From owner-freebsd-current@FreeBSD.ORG  Fri Oct  1 21:18:56 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 7DF5216A4CE
	for <freebsd-current@freebsd.org>;
	Fri,  1 Oct 2004 21:18:56 +0000 (GMT)
Received: from post.ma.ee (ns.ma.ee [213.184.38.178])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 196DE43D45
	for <freebsd-current@freebsd.org>;
	Fri,  1 Oct 2004 21:18:56 +0000 (GMT)
	(envelope-from priit.piipuu@mail.ee)
Received: from localhost (unknown [192.168.105.66])
	by post.ma.ee (Postfix) with ESMTP id 8509A7AC3
	for <freebsd-current@freebsd.org>;
	Sat,  2 Oct 2004 00:16:51 +0300 (EEST)
Received: from [192.168.103.198] (unknown [192.168.103.198])
	by post.ma.ee (Postfix) with ESMTP id 3EF3C7AC2
	for <freebsd-current@freebsd.org>;
	Sat,  2 Oct 2004 00:16:51 +0300 (EEST)
Message-ID: <415DC963.4020402@mail.ee>
Date: Sat, 02 Oct 2004 00:17:23 +0300
From: Priit Piipuu <priit.piipuu@mail.ee>
User-Agent: Mozilla Thunderbird 0.7.3 (Windows/20040803)
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: freebsd-current@freebsd.org
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Virus-Scanned: by F-Secure Anti-Virus at emta.ee
Subject: panic: Bio already on queue bp=0xc1c69210
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: Fri, 01 Oct 2004 21:18:56 -0000

This is with quite recent -CURRENT, cvsupped yesterday. Machine locks  
after
panic, so no  coredump. Stack trace, written down by hand:

kdb_backtrace()
panic ()
g_io_request ()
g_io_deliver()
g_bde_contribute ()
g_bde_work_done ()
g_bde_start2()
g_bde_start1 ()
g_io_shedule_down ()
g_down_procbody ()
fork_exit ()
fork_trampoline()

How to reproduce:

mdconfig -a  -f  md.img -u 0
gbde attach md0 -l md.lock
mount /dev/md0.bde /mnt
mv foo/ /mnt

This panic is semi-repeatable, (un)fortunately it does'nt crash every time.
Catalog  foo contains lot of small files (at least hundred or so).