Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262357AbVC3RYq (ORCPT ); Wed, 30 Mar 2005 12:24:46 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262358AbVC3RYq (ORCPT ); Wed, 30 Mar 2005 12:24:46 -0500 Received: from smtp4.poczta.onet.pl ([213.180.130.28]:26273 "EHLO smtp4.poczta.onet.pl") by vger.kernel.org with ESMTP id S262357AbVC3RYo (ORCPT ); Wed, 30 Mar 2005 12:24:44 -0500 Message-ID: <424AE18B.1080009@poczta.onet.pl> Date: Wed, 30 Mar 2005 19:27:39 +0200 From: Wiktor User-Agent: Debian Thunderbird 1.0 (X11/20050116) X-Accept-Language: en-us, en MIME-Version: 1.0 To: =?ISO-8859-1?Q?M=E5ns_Rullg=E5rd?= CC: linux-kernel@vger.kernel.org Subject: Re: [RFD] 'nice' attribute for executable files References: <424ACEA9.6070401@poczta.onet.pl> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1509 Lines: 33 M?ns Rullg?rd wrote: > > It can be done entirely in userspace, if you want it. Just hack your > shell to examine some extended attribute of your choice, and adjust > the nice value before executing files. Then arrange to have the shell > run with a negative nice value. This can be easily accomplished with > a simple wrapper, only for the shell. > this method can be applied, as you've written, only for shell (which have to be hacked before). so, every program that runs any other program should be hacked to use pre-execution-renice-database. rewriting all the programs in the world takes a bit more time than i have to the death. woudn't it be simplier to implement it in kernel, somewhere near setuid/setgid bits? if it would make system slower, support of such attribute could be optional, just like acl-s. i've found a way to perform such function in userland, but it is awful, and, if some program runs another, that should be reniced, very often, starting a shell (even ash) for each call will surely smoke my cpu. this feature without doubt belongs to kernel - it is performed every time kernel starts a program, and it is not so complicated like, let's say, hotplug support, is it? thx for replies -- wixor Maye the Source be with you. - 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/