From owner-freebsd-hackers@FreeBSD.ORG  Mon May 13 19:09:27 2013
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115])
 by hub.freebsd.org (Postfix) with ESMTP id B58FC9D4
 for <freebsd-hackers@freebsd.org>; Mon, 13 May 2013 19:09:27 +0000 (UTC)
 (envelope-from julian@freebsd.org)
Received: from vps1.elischer.org (vps1.elischer.org [204.109.63.16])
 by mx1.freebsd.org (Postfix) with ESMTP id 8D6E92B0
 for <freebsd-hackers@freebsd.org>; Mon, 13 May 2013 19:09:27 +0000 (UTC)
Received: from Julian-MBP3.local
 (50-196-156-133-static.hfc.comcastbusiness.net [50.196.156.133])
 (authenticated bits=0)
 by vps1.elischer.org (8.14.5/8.14.5) with ESMTP id r4DJ9Q3P088239
 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO);
 Mon, 13 May 2013 12:09:26 -0700 (PDT)
 (envelope-from julian@freebsd.org)
Message-ID: <51913A61.1030701@freebsd.org>
Date: Mon, 13 May 2013 12:09:21 -0700
From: Julian Elischer <julian@freebsd.org>
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8;
 rv:17.0) Gecko/20130328 Thunderbird/17.0.5
MIME-Version: 1.0
To: Computer Network Man <comnetboy@gmail.com>
Subject: Re: A problem with alq module!
References: <CAKsK_pqu_Xd-RqFGfJz_4OGYpsBktfm=zEnRApjbQ8k05YO3Vg@mail.gmail.com>
In-Reply-To: <CAKsK_pqu_Xd-RqFGfJz_4OGYpsBktfm=zEnRApjbQ8k05YO3Vg@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-hackers@freebsd.org
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
 <freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/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: Mon, 13 May 2013 19:09:27 -0000

On 5/12/13 11:37 PM, Computer Network Man wrote:
> Dear Guys;
> In a fresh FreeBSD 9 or 9.1 Release if you just run these commands:
> # kldload alq
> # kldunload alq
> # init 0 or shutdown -p now
> it will panic!
> maybe it's a bug.
> We have a module which uses alq API's.
>      MODULE_DEPEND(mymodule, alq, 1, 1, 1)
> when our module starts, loads alq. and when it stops, unloads alq. So after
> starting and stoping our module and shutdown, we have panic.
> any opinion in this regard would be appreciated.
> _______________________________________________
> freebsd-hackers@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers
> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
>
without looking at it, I am guessing that the alq module may 
mis-register for shutdown notification... (and not undo it)..

UTSL   please register a bug and include some debugging information....