Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262567AbVA0LRg (ORCPT ); Thu, 27 Jan 2005 06:17:36 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262579AbVA0LQS (ORCPT ); Thu, 27 Jan 2005 06:16:18 -0500 Received: from canuck.infradead.org ([205.233.218.70]:26378 "EHLO canuck.infradead.org") by vger.kernel.org with ESMTP id S262567AbVA0LNn (ORCPT ); Thu, 27 Jan 2005 06:13:43 -0500 Subject: Re: Patch 1/6 introduce sysctl From: Arjan van de Ven To: Andi Kleen Cc: Arjan van de Ven , linux-kernel@vger.kernel.org In-Reply-To: References: <20050127101117.GA9760@infradead.org> <20050127101201.GB9760@infradead.org> Content-Type: text/plain Date: Thu, 27 Jan 2005 12:13:33 +0100 Message-Id: <1106824413.5624.76.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 (2.0.2-3) Content-Transfer-Encoding: 7bit X-Spam-Score: 4.1 (++++) X-Spam-Report: SpamAssassin version 2.63 on canuck.infradead.org summary: Content analysis details: (4.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.3 RCVD_NUMERIC_HELO Received: contains a numeric HELO 1.1 RCVD_IN_DSBL RBL: Received via a relay in list.dsbl.org [] 2.5 RCVD_IN_DYNABLOCK RBL: Sent directly from dynamic IP address [80.57.133.107 listed in dnsbl.sorbs.net] 0.1 RCVD_IN_SORBS RBL: SORBS: sender is listed in SORBS [80.57.133.107 listed in dnsbl.sorbs.net] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1263 Lines: 28 On Thu, 2005-01-27 at 11:36 +0100, Andi Kleen wrote: > Arjan van de Ven writes: > > > This first patch of the series introduces a sysctl (default off) that > > enables/disables the randomisation feature globally. Since randomisation may > > make it harder to debug really tricky situations (reproducability goes > > down), the sysadmin needs a way to disable it globally. > > A global sysctl doesn't make much sense to me for this. If you > want to get some program running you don't want to impact your > system daemons. And a non root user couldn't enable it anyways, > which can be annoying if it is needed to get some binary working. > > If anything I would make it a personality flag so that it can > be set per process. I actually wanted both; eg a global "whack it off" and a per process flag for all the reasons you state. I have no objection to remove the global "whack it off" flag, however, for testing this stuff in -mm it might be useful to have a simple "turn it off" option. - 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/