Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422811AbWI2Ukj (ORCPT ); Fri, 29 Sep 2006 16:40:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932377AbWI2Uki (ORCPT ); Fri, 29 Sep 2006 16:40:38 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:12232 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S932371AbWI2Ukh (ORCPT ); Fri, 29 Sep 2006 16:40:37 -0400 Date: Fri, 29 Sep 2006 22:32:27 +0200 From: Ingo Molnar To: Andi Kleen Cc: Jim Cromie , Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: 2.6.18-mm2 Message-ID: <20060929203227.GA5051@elte.hu> References: <20060928014623.ccc9b885.akpm@osdl.org> <200609290108.15400.ak@suse.de> <20060929201449.GA32262@elte.hu> <200609292236.15330.ak@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200609292236.15330.ak@suse.de> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: -2.8 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.8 required=5.9 tests=ALL_TRUSTED,AWL,BAYES_50 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts 0.5 BAYES_50 BODY: Bayesian spam probability is 40 to 60% [score: 0.5000] -0.0 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1430 Lines: 42 * Andi Kleen wrote: > On Friday 29 September 2006 22:14, Ingo Molnar wrote: > > > > * Andi Kleen wrote: > > > > > BTW I was planning to make LOCAL_APIC unconditional on i386 too like > > > on x86-64. > > > > please dont - embedded doesnt need it most of the time. > > What do you mean with not need? Local APIC is an infinitely better > interface than PIC and faster. On embedded too this makes a lot of > sense. it's just not present or hardware-disabled. > And a lot of modern systems don't even work anymore without APIC > enabled because Windows uses it and the BIOS haven't been tested > without it (e.g. you often find totally broken code paths in the AML > for PIC mode) > > The code size also isn't a good argument because the delta > isn't that big: > > text data bss dec hex filename > 3303894 694980 436420 4435294 43ad5e obj32-up/vmlinux > 3266532 665732 402372 4334636 42242c obj32-up-noapic/vmlinux > > ~63K. 63K???? You've got to be kidding. That's huge. That's ~10% of the minconfig kernel. Even 1K would be bad. We did config hacks for half a K win. Please ... dont cripple the i686 kernel. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/