From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752591AbYHZXsd (ORCPT ); Tue, 26 Aug 2008 19:48:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752083AbYHZXsY (ORCPT ); Tue, 26 Aug 2008 19:48:24 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:51204 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752045AbYHZXsX (ORCPT ); Tue, 26 Aug 2008 19:48:23 -0400 Date: Tue, 26 Aug 2008 16:47:48 -0700 (PDT) From: Linus Torvalds To: Parag Warudkar cc: Adrian Bunk , Rusty Russell , "Alan D. Brunelle" , "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Andrew Morton , Arjan van de Ven , Ingo Molnar , linux-embedded@vger.kernel.org Subject: Re: [Bug #11342] Linux 2.6.27-rc3: kernel BUG at mm/vmalloc.c - bisected In-Reply-To: Message-ID: References: <48B313E0.1000501@hp.com> <200808261111.19205.rusty@rustcorp.com.au> <20080826183051.GB10925@cs181140183.pp.htv.fi> <20080826205916.GB11734@cs181140183.pp.htv.fi> User-Agent: Alpine 1.10 (LFD 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 26 Aug 2008, Parag Warudkar wrote: > > This is something I never understood - embedded devices are not going > to run more than a few processes and 4K*(Few Processes) > IMHO is not worth a saving now a days even in embedded world given > falling memory prices. Or do I misunderstand? Well, by that argument, 1% of kernel size doesn't matter either.. 1% of a kernel for an embedded device is roughly 10-30kB or so depending on how small you make the configuration. If that matters, then so should the difference of 3-8 processes' kernel stack usage when you have a 4k/8k stack choice. And they _all_ will have at least 3-8 processes on them. Even the simplest ones will tend to have many more. Linus