From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932157AbXGRGjS (ORCPT ); Wed, 18 Jul 2007 02:39:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752568AbXGRGjF (ORCPT ); Wed, 18 Jul 2007 02:39:05 -0400 Received: from wr-out-0506.google.com ([64.233.184.233]:27453 "EHLO wr-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752342AbXGRGjD (ORCPT ); Wed, 18 Jul 2007 02:39:03 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=qkoZe6jhz8XTR1XtA77XP042+6bZ+cnF1tLFR4NQ8yxvovqURLbeieSKZ4pReqNB1uYGFs4EZI64iZh1JFSFU61/ZvHIwYtcvKG1YhMdqeL9ixHmOYm0ubzGq3MotcUeBT2xjNlRe3VJyhBNF4po6wEiw37VuuDHfaNthMfdAhc= Message-ID: <2c0942db0707172339o2e4950e0p17cd0f9b631e5311@mail.gmail.com> Date: Tue, 17 Jul 2007 23:39:00 -0700 From: "Ray Lee" To: "Alan Cox" Subject: Re: [PATCH][RFC] 4K stacks default, not a debug thing any more...? Cc: "Rene Herman" , "Bodo Eggert" <7eggert@gmx.de>, "Matt Mackall" , "Jeremy Fitzhardinge" , "Jesper Juhl" , "Linux Kernel Mailing List" , "William Lee Irwin III" , "David Chinner" , "Arjan van de Ven" In-Reply-To: <20070718011436.2438dea6@the-village.bc.nu> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <8FO1e-2jW-35@gated-at.bofh.it> <469A5D7C.5010904@gmail.com> <469BF104.1040703@gmail.com> <2c0942db0707161537o2852a308s26e79235e897e282@mail.gmail.com> <20070716235438.1bdd0722@the-village.bc.nu> <2c0942db0707161553u5d55724u82424b3ffbbd79f7@mail.gmail.com> <469BF9A8.20306@gmail.com> <2c0942db0707161615g4bdf825ar51464ba564a823e2@mail.gmail.com> <20070718011436.2438dea6@the-village.bc.nu> X-Google-Sender-Auth: d930913fbdcf3589 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 7/17/07, Alan Cox wrote: > On Mon, 16 Jul 2007 16:15:28 -0700 > "Ray Lee" wrote: > > Heh :-). No, it's not a question of trust. First and foremost, it's > > that there are still users who say that they can crash a current > > 4k+interrupt stacks kernel, while the 8k without interrupt stacks is > > fine. > > You forgot "most of the time". Yeah, fair enough. > Its statistically less likely, which > merely means its evilly hard to debug Not being able to debug the cases that occur (and the fact that they're rare, as you're pointing out) is as much of a problem as the crashes themselves. 8k + IRQ stacks with a warning when 4k of process stack is exceeded would seem like a reasonable first step to making 4k a palatable default. Ray