Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261855AbVANCmn (ORCPT ); Thu, 13 Jan 2005 21:42:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261865AbVANCmm (ORCPT ); Thu, 13 Jan 2005 21:42:42 -0500 Received: from out009pub.verizon.net ([206.46.170.131]:27578 "EHLO out009.verizon.net") by vger.kernel.org with ESMTP id S261855AbVANCl0 (ORCPT ); Thu, 13 Jan 2005 21:41:26 -0500 Message-Id: <200501140240.j0E2esKG026962@localhost.localdomain> To: Nick Piggin cc: utz lehmann , Lee Revell , Arjan van de Ven , "Jack O'Quin" , Chris Wright , Matt Mackall , Christoph Hellwig , Andrew Morton , mingo@elte.hu, alan@lxorguk.ukuu.org.uk, LKML , Con Kolivas Subject: Re: [PATCH] [request for inclusion] Realtime LSM In-reply-to: Your message of "Fri, 14 Jan 2005 13:24:11 +1100." <1105669451.5402.38.camel@npiggin-nld.site> Date: Thu, 13 Jan 2005 21:40:54 -0500 From: Paul Davis X-Authentication-Info: Submitted using SMTP AUTH at out009.verizon.net from [141.152.253.251] at Thu, 13 Jan 2005 20:41:24 -0600 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1302 Lines: 28 >SCHED_FIFO and SCHED_RR are definitely privileged operations and you this is the crux of what this whole debate is about. for all of you people who think about linux on multi-user systems with network connectivity, running servers and so forth, this is clearly a given. but there is large and growing body of machines that run linux where the sole human user of the machine has a strong and overwhelming desire to have tasks run with the characteristics offered by SCHED_FIFO and/or SCHED_RR. are they still "privileged" operations on this class of linux system? what about linux installed on an embedded system, with a small LCD screen and the sole purpose of running audio apps live? are they still privileged then? i think there is room for debate, but its clear that in general, SCHED_FIFO/SCHED_RR's "definite" status as privileged operations is not clear. we are trying to find ways to provide access to it in ways that don't conflict with the other categories of linux systems where it clearly needs to be off-limits to unprivileged users. --p - 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/