Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030368AbVKPPic (ORCPT ); Wed, 16 Nov 2005 10:38:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751477AbVKPPic (ORCPT ); Wed, 16 Nov 2005 10:38:32 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:18389 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S1751475AbVKPPib (ORCPT ); Wed, 16 Nov 2005 10:38:31 -0500 Subject: Re: [2.6 patch] i386: always use 4k stacks From: Arjan van de Ven To: Oliver Neukum Cc: jmerkey , =?ISO-8859-1?Q?J=F6rn?= Engel , Andi Kleen , alex14641@yahoo.com, linux-kernel@vger.kernel.org In-Reply-To: <200511161630.59588.oliver@neukum.org> References: <20051116005034.73421.qmail@web50210.mail.yahoo.com> <20051116135116.GA24753@wohnheim.fh-wedel.de> <437B453E.8070905@utah-nac.org> <200511161630.59588.oliver@neukum.org> Content-Type: text/plain Date: Wed, 16 Nov 2005 16:38:01 +0100 Message-Id: <1132155482.2834.42.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit X-Spam-Score: 1.8 (+) X-Spam-Report: SpamAssassin version 3.0.4 on pentafluge.infradead.org summary: Content analysis details: (1.8 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.1 RCVD_IN_SORBS_DUL RBL: SORBS: sent directly from dynamic IP address [213.93.14.173 listed in dnsbl.sorbs.net] 1.7 RCVD_IN_NJABL_DUL RBL: NJABL: dialup sender did non-local SMTP [213.93.14.173 listed in combined.njabl.org] X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 780 Lines: 21 On Wed, 2005-11-16 at 16:30 +0100, Oliver Neukum wrote: > Am Mittwoch, 16. November 2005 15:42 schrieb jmerkey: > > Map a blank ro page beneath the address range when stack memory is > > mapped is trap on page faults to the page when folks go off the end of > > th e stack. > > > > Easy to find. > > Provided you can easily trigger it. I don't see how that is a given. the same is true for a unified 8k stack or for the 4k/4k split though. Ok sure there's a 1.5Kb difference on the one side.. (but a 2Kb gain on the other side) - 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/