From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1766880AbXDSRGo (ORCPT ); Thu, 19 Apr 2007 13:06:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161505AbXDSRGo (ORCPT ); Thu, 19 Apr 2007 13:06:44 -0400 Received: from mailout.stusta.mhn.de ([141.84.69.5]:55870 "EHLO mailhub.stusta.mhn.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1161504AbXDSRGn (ORCPT ); Thu, 19 Apr 2007 13:06:43 -0400 Date: Thu, 19 Apr 2007 19:06:50 +0200 From: Adrian Bunk To: Andi Kleen Cc: discuss@x86-64.org, linux-kernel@vger.kernel.org, Arjan van de Ven Subject: Re: Dropping CONFIG_REORDER on x86-64 for 2.6.22 Message-ID: <20070419170650.GI10338@stusta.de> References: <200704191354.52985.ak@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <200704191354.52985.ak@suse.de> User-Agent: Mutt/1.5.15+20070412 (2007-04-11) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 19, 2007 at 01:54:52PM +0200, Andi Kleen wrote: > > Hallo, > > I'm thinking about dropping the x86-64 CONFIG_REORDER for 2.6.22. > The function enabled -ffunction-sections and then tries to reorder > the executable > > While that's in theory a worthy goal to save TLB/icache, in practice it > didn't really work out. > > Rationale: >... > So I'm planning to drop the option and arch/x86_64/kernel/functionlist > > Comments? Have there been any benchmarks showing performance improvements with -ffunction-sections? > -Andi 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