From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261703AbVCHGWL (ORCPT ); Tue, 8 Mar 2005 01:22:11 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261775AbVCHGU0 (ORCPT ); Tue, 8 Mar 2005 01:20:26 -0500 Received: from waste.org ([216.27.176.166]:30891 "EHLO waste.org") by vger.kernel.org with ESMTP id S261703AbVCHGTO (ORCPT ); Tue, 8 Mar 2005 01:19:14 -0500 Date: Mon, 7 Mar 2005 22:18:36 -0800 From: Matt Mackall To: Peter Williams Cc: Andrew Morton , paul@linuxaudiosystems.com, joq@io.com, cfriesen@nortelnetworks.com, chrisw@osdl.org, hch@infradead.org, rlrevell@joe-job.com, arjanv@redhat.com, mingo@elte.hu, alan@lxorguk.ukuu.org.uk, linux-kernel@vger.kernel.org Subject: Re: [PATCH] [request for inclusion] Realtime LSM Message-ID: <20050308061836.GL3120@waste.org> References: <20050112185258.GG2940@waste.org> <200501122116.j0CLGK3K022477@localhost.localdomain> <20050307195020.510a1ceb.akpm@osdl.org> <20050308043349.GG3120@waste.org> <20050307204044.23e34019.akpm@osdl.org> <422D3AB2.9020409@bigpond.net.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <422D3AB2.9020409@bigpond.net.au> User-Agent: Mutt/1.5.6+20040907i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 08, 2005 at 04:40:02PM +1100, Peter Williams wrote: > The granting of the ability to switch to and from RT mode should require > a means to specify which users it applies to and also which programs it > applies to. The RT rlimits mechanism doesn't meet these criteria. a) rlimits are per-process b) rlimits are typically administered per-user c) any user can trivially gain any privilege of any process they own so in some sense per-process limits are meaningless So rlimits are in fact as granular as can be, both in theory and in practice. -- Mathematics is the supreme nostalgia of our time.