From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932517AbXCGE3w (ORCPT ); Tue, 6 Mar 2007 23:29:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932636AbXCGE3w (ORCPT ); Tue, 6 Mar 2007 23:29:52 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:54341 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932517AbXCGE3v (ORCPT ); Tue, 6 Mar 2007 23:29:51 -0500 Subject: Re: Wanted: simple, safe x86 stack overflow detection From: Arjan van de Ven To: Bill Irwin Cc: Hugh Dickins , Chuck Ebbert , Andi Kleen , linux-kernel In-Reply-To: <20070306203432.GD18774@holomorphy.com> References: <45E5913D.3080505@redhat.com> <20070228204144.GA32316@one.firstfloor.org> <20070304015031.GA4224@holomorphy.com> <45EDBA1B.8050007@redhat.com> <20070306203432.GD18774@holomorphy.com> Content-Type: text/plain Organization: Intel International BV Date: Tue, 06 Mar 2007 20:28:35 -0800 Message-Id: <1173241715.3236.16.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.8.3 (2.8.3-1.fc6) Content-Transfer-Encoding: 7bit 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 > I'm certainly in favor of the move; IRQ stacks could be made > rather deep and cheaply at that. I may get around to writing it this > week if no one else does it first. the irq stacks aren't the problem; RH at some point accidentally shipped a kernel with 4k *shared* irq/user context stack and even that gave almost no issues. irq's really shouldn't actually nest; it's bad for just about everything to do that (but that's another story, I would *love* to get rid of the "enable irqs" thing in the x86 irq path, it hurts just about anything in reality)