Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755087AbXFYAMa (ORCPT ); Sun, 24 Jun 2007 20:12:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752576AbXFYAMW (ORCPT ); Sun, 24 Jun 2007 20:12:22 -0400 Received: from kanga.kvack.org ([66.96.29.28]:54387 "EHLO kanga.kvack.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752447AbXFYAMV (ORCPT ); Sun, 24 Jun 2007 20:12:21 -0400 Date: Sun, 24 Jun 2007 20:12:03 -0400 From: Benjamin LaHaise To: Arjan van de Ven Cc: Oleg Verych , rae l , trivial@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] trivial: the memset operation on a automatic array variable should be optimized out by data initialization Message-ID: <20070625001203.GB971@kvack.org> References: <467cac85.081b600a.5b88.457f@mx.google.com> <91b13c310706240558p70dbaed2g570b57ab480aa974@mail.gmail.com> <20070624222518.GA10398@flower.upol.cz> <1182723318.6819.5.camel@laptopd505.fenrus.org> <20070624232314.GA971@kvack.org> <1182730156.6819.8.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1182730156.6819.8.camel@laptopd505.fenrus.org> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 654 Lines: 16 On Sun, Jun 24, 2007 at 05:09:16PM -0700, Arjan van de Ven wrote: > if you care about the last cycle, don't specify -Os but -O2. > simple as that... you get what you tell the compiler you want. Certain distros are shipping kernels compiled with -Os. And it's more than just a couple of cycles. -ben -- "Time is of no importance, Mr. President, only life is important." Don't Email: . - 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/