From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935292AbXGRSeq (ORCPT ); Wed, 18 Jul 2007 14:34:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761676AbXGRSej (ORCPT ); Wed, 18 Jul 2007 14:34:39 -0400 Received: from mailout.stusta.mhn.de ([141.84.69.5]:37534 "EHLO mailhub.stusta.mhn.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757984AbXGRSei (ORCPT ); Wed, 18 Jul 2007 14:34:38 -0400 Date: Wed, 18 Jul 2007 20:33:59 +0200 From: Adrian Bunk To: "H. Peter Anvin" Cc: Andi Kleen , Jonathan Campbell , linux-kernel@vger.kernel.org, torvalds@transmeta.com Subject: Re: Patches for REALLY TINY 386 kernels Message-ID: <20070718183359.GK3801@stusta.de> References: <469A8AED.7070207@nerdgrounds.com> <469E3806.4030804@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <469E3806.4030804@zytor.com> User-Agent: Mutt/1.5.16 (2007-06-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 18, 2007 at 08:55:50AM -0700, H. Peter Anvin wrote: > Andi Kleen wrote: > > > >> Already with these patches I can compile a zImage kernel that is 450kb > >> large (890kb decompressed) > > > > The important part is not how big the vmlinux is, but how much > > memory is actually used after boot. > > > > I expect concentrating some of the dynamic data structures would > > be more fruitful in fact. > > > > Well, how big the vmlinux file is matters if it doesn't fit in memory > with enough time to get to the phase where it is dumping the init > sections. *If that is not the issue*, then axing stuff like CPUID is a > major lose in terms of code maintainability for zero gain. If this is an issue, then changing i386 back to discarding __exit code and data at linktime instead of runtime might make a bigger difference. > -hpa cu Adrian -- "Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed