From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261304AbULARFo (ORCPT ); Wed, 1 Dec 2004 12:05:44 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261359AbULARFo (ORCPT ); Wed, 1 Dec 2004 12:05:44 -0500 Received: from viper.oldcity.dca.net ([216.158.38.4]:51102 "HELO viper.oldcity.dca.net") by vger.kernel.org with SMTP id S261304AbULARFl (ORCPT ); Wed, 1 Dec 2004 12:05:41 -0500 Subject: Re: cd burning, capabilities and available modes From: Lee Revell To: "J.A. Magallon" Cc: Lista Linux-Kernel In-Reply-To: <1101908433l.8423l.0l@werewolf.able.es> References: <1101908433l.8423l.0l@werewolf.able.es> Content-Type: text/plain Date: Wed, 01 Dec 2004 12:05:38 -0500 Message-Id: <1101920739.18170.29.camel@krustophenia.net> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2004-12-01 at 13:40 +0000, J.A. Magallon wrote: > As user: > werewolf:/store/tmp> cdrecord -dummy dev=ATAPI:1,0,0 *.iso > ... > cdrecord: Cannot allocate memory. WARNING: Cannot do mlockall(2). > cdrecord: WARNING: This causes a high risk for buffer underruns. > cdrecord: Operation not permitted. WARNING: Cannot set RR-scheduler > cdrecord: Permission denied. WARNING: Cannot set priority using setpriority(). > cdrecord: WARNING: This causes a high risk for buffer underruns. You can use the realtime LSM (see list archives) to let specific groups of users use mlockall and run RT tasks. Just load it like: modprobe realtime gid=29 and make gid 29 your "cdrecord" group. This should make CD burning as joeuser reliable as root. Most people use this for low latency audio but I think cd burning is a wider and completely unexplored application. Lee