Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262927AbVAKXNb (ORCPT ); Tue, 11 Jan 2005 18:13:31 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262870AbVAKXKT (ORCPT ); Tue, 11 Jan 2005 18:10:19 -0500 Received: from fw.osdl.org ([65.172.181.6]:40667 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S262918AbVAKXGA (ORCPT ); Tue, 11 Jan 2005 18:06:00 -0500 Date: Tue, 11 Jan 2005 15:05:56 -0800 From: Chris Wright To: Paul Davis Cc: Arjan van de Ven , Lee Revell , Matt Mackall , Chris Wright , "Jack O'Quin" , Christoph Hellwig , Andrew Morton , mingo@elte.hu, alan@lxorguk.ukuu.org.uk, linux-kernel@vger.kernel.org Subject: Re: [PATCH] [request for inclusion] Realtime LSM Message-ID: <20050111150556.S10567@build.pdx.osdl.net> References: <20050111214152.GA17943@devserv.devel.redhat.com> <200501112251.j0BMp9iZ006964@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <200501112251.j0BMp9iZ006964@localhost.localdomain>; from paul@linuxaudiosystems.com on Tue, Jan 11, 2005 at 05:51:09PM -0500 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1204 Lines: 27 * Paul Davis (paul@linuxaudiosystems.com) wrote: > >On Tue, Jan 11, 2005 at 04:38:14PM -0500, Lee Revell wrote: > >> Yes but a bug in an app running as root can trash the filesystem. The > >> worst you can do with RT privileges is lock up the machine. > > > >several filesystem and IO threads run at prio -10 but not RT. > >That makes me a bit less sure of your statement.... > > Its completely orthogonal. Lee didn't say "tasks running without RT > can't mess up filesystems". He said "tasks running as root can trash > the filesystem" and "tasks running as RT can lock up the > machine". obviously, the intersection point (a root, RT task) is > double trouble. This is straying from the core issue... But, Arjan's saying that an RT (non-root) task could trash the filesystem if it deadlocks the machine (because those important fs and IO threads don't run). thanks, -chris -- Linux Security Modules http://lsm.immunix.org http://lsm.bkbits.net - 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/