From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750715AbVLTSnl (ORCPT ); Tue, 20 Dec 2005 13:43:41 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750813AbVLTSnl (ORCPT ); Tue, 20 Dec 2005 13:43:41 -0500 Received: from pentafluge.infradead.org ([213.146.154.40]:32686 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S1750715AbVLTSnk (ORCPT ); Tue, 20 Dec 2005 13:43:40 -0500 Subject: Re: About 4k kernel stack size.... From: Arjan van de Ven To: "linux-os (Dick Johnson)" Cc: "Linux-Kernel," In-Reply-To: References: <20051218231401.6ded8de2@werewolf.auna.net> <43A77205.2040306@rtr.ca> <20051220133729.GC6789@stusta.de> <170fa0d20512200637l169654c9vbe38c9931c23dfb1@mail.gmail.com> <46578.10.10.10.28.1135094132.squirrel@linux1> Content-Type: text/plain Date: Tue, 20 Dec 2005 19:43:29 +0100 Message-Id: <1135104210.2952.26.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: -2.8 (--) X-Spam-Report: SpamAssassin version 3.0.4 on pentafluge.infradead.org summary: Content analysis details: (-2.8 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.8 ALL_TRUSTED Did not pass through any untrusted hosts 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 > A kernel stack is simply an implimentation detail. Somebody made > an early decision to use non-paged memory for stacks. From that > point one, we have to either live with it or change it. The > change doesn't involve size. It involves kind. it involves a whole lot, like banning dma from the stack, and to make it swapable or kmapped you'd even need to fix all the places that put things like wait queues on the stack, as well as many other similar data structures. Staying at 4Kb is a lot easier than that ;)