Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 30 Sep 2002 11:27:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 30 Sep 2002 11:27:56 -0400 Received: from dsl-213-023-038-108.arcor-ip.net ([213.23.38.108]:27538 "EHLO starship") by vger.kernel.org with ESMTP id ; Mon, 30 Sep 2002 11:27:55 -0400 Content-Type: text/plain; charset=US-ASCII From: Daniel Phillips To: Greg KH , Alan Cox Subject: Re: [PATCH] In-kernel module loader 1/7 Date: Mon, 30 Sep 2002 17:32:36 +0200 X-Mailer: KMail [version 1.3.2] Cc: Roman Zippel , Rusty Russell , linux-kernel@vger.kernel.org References: <20020919125906.21DEA2C22A@lists.samba.org> <1032461895.27865.54.camel@irongate.swansea.linux.org.uk> <20020919201140.GB17131@kroah.com> In-Reply-To: <20020919201140.GB17131@kroah.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Message-Id: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1426 Lines: 33 On Thursday 19 September 2002 22:11, Greg KH wrote: > On Thu, Sep 19, 2002 at 07:58:15PM +0100, Alan Cox wrote: > > On Thu, 2002-09-19 at 19:38, Greg KH wrote: > > > And with a LSM module, how can it answer that? There's no way, unless > > > we count every time someone calls into our module. And if you do that, > > > no one will even want to use your module, given the number of hooks, and > > > the paths those hooks are on (the speed hit would be horrible.) > > > > So the LSM module always says no. Don't make other modules suffer > > Ok, I don't have a problem with that, I was just trying to point out > that not all modules can know when they are able to be unloaded, as > Roman stated. Not being able to unload LSM would suck enormously. At last count, we knew how to do this: 1) Unhook the function hooks (using a call table simplifies this) 2) Schedule on each CPU to ensure all tasks are out of the module 3) A schedule where the module count is incremented doesn't count and we rely on the rule that and module code that could sleep must be bracketed by inc/dec of the module count. Did somebody come up with a reason why this will not work? -- Daniel - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/