From owner-freebsd-stable@FreeBSD.ORG Thu Jan 31 12:39:56 2008 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 11B4816A46C for ; Thu, 31 Jan 2008 12:39:56 +0000 (UTC) (envelope-from avg@icyb.net.ua) Received: from falcon.cybervisiontech.com (falcon.cybervisiontech.com [217.20.163.9]) by mx1.freebsd.org (Postfix) with ESMTP id A60D413C447 for ; Thu, 31 Jan 2008 12:39:55 +0000 (UTC) (envelope-from avg@icyb.net.ua) Received: from localhost (localhost [127.0.0.1]) by falcon.cybervisiontech.com (Postfix) with ESMTP id DAE5343E1F9; Thu, 31 Jan 2008 14:39:53 +0200 (EET) X-Virus-Scanned: Debian amavisd-new at falcon.cybervisiontech.com Received: from falcon.cybervisiontech.com ([127.0.0.1]) by localhost (falcon.cybervisiontech.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 9O4j+WEySIJ6; Thu, 31 Jan 2008 14:39:53 +0200 (EET) Received: from [10.2.1.87] (gateway.cybervisiontech.com.ua [88.81.251.18]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by falcon.cybervisiontech.com (Postfix) with ESMTP id 728DD43D71C; Thu, 31 Jan 2008 14:39:53 +0200 (EET) Message-ID: <47A1C198.6090802@icyb.net.ua> Date: Thu, 31 Jan 2008 14:39:52 +0200 From: Andriy Gapon User-Agent: Thunderbird 2.0.0.9 (X11/20080123) MIME-Version: 1.0 To: John Baldwin References: <47A0B642.9060000@icyb.net.ua> <200801310607.55346.jhb@freebsd.org> In-Reply-To: <200801310607.55346.jhb@freebsd.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: freebsd-stable@freebsd.org Subject: Re: kld regression X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 31 Jan 2008 12:39:56 -0000 on 31/01/2008 13:07 John Baldwin said the following: > On Wednesday 30 January 2008 12:39:14 pm Andriy Gapon wrote: >> The problem is as follows: >> 1. put udf_load="YES" in loader.conf >> 2. you can mount and unmount udf filesystems >> 3. you can kldunload udf if no udf filesystems are mounted >> 4. now mount udf fs while udf.ko is unloaded >> 5. udf is auto loaded and fs is mounted >> 6. unmount fs >> 7. try to kldunload udf >> kldunload: can't unload file: Device busy >> kernel message: kldunload: attempt to unload file that was loaded by the >> kernel >> >> Yeah, it was loaded by kernel indeed, but WTF - what is the difference >> from manual/loader.conf loading and why I can not manage my modules as I >> wish? > > Hmm, the relevant code (vfs_init.c) hasn't changed in 6.x since 6.0. There > were some changes in 7.0, but this should work in both branches. What is the > previous release that this worked on? > Maybe I was wrong when I called this regression, but this was very surprising behavior for me. And in 5.X I did a lot of udf debugging/experimenting and never encountered such a problem. Maybe I always did kldload before mount, I can't tell now. Anyway, this seems like an annoyance at the very least, pinning a kernel module without any important reasons. -- Andriy Gapon