Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755332Ab0FKGTf (ORCPT ); Fri, 11 Jun 2010 02:19:35 -0400 Received: from terminus.zytor.com ([198.137.202.10]:44568 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753161Ab0FKGTd (ORCPT ); Fri, 11 Jun 2010 02:19:33 -0400 Message-ID: <4C11D51E.3080909@zytor.com> Date: Thu, 10 Jun 2010 23:18:06 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100430 Fedora/3.0.4-3.fc13 Thunderbird/3.0.4 MIME-Version: 1.0 To: Ingo Molnar CC: Peter Zijlstra , Jason Baron , linux-kernel@vger.kernel.org, mathieu.desnoyers@polymtl.ca, tglx@linutronix.de, rostedt@goodmis.org, andi@firstfloor.org, roland@redhat.com, rth@redhat.com, mhiramat@redhat.com, fweisbec@gmail.com, avi@redhat.com, davem@davemloft.net, vgoyal@redhat.com, sam@ravnborg.org Subject: Re: [PATCH 03/13] jump label v9: x86 support References: <1276171930.2077.200.camel@twins> <20100610121440.GA20130@elte.hu> In-Reply-To: <20100610121440.GA20130@elte.hu> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1034 Lines: 29 On 06/10/2010 05:14 AM, Ingo Molnar wrote: > > * Peter Zijlstra wrote: > >> On Wed, 2010-06-09 at 17:39 -0400, Jason Baron wrote: >>> + select HAVE_ARCH_JUMP_LABEL if !CC_OPTIMIZE_FOR_SIZE >> >> That deserves a comment somewhere, it basically makes OPTIMIZE_FOR_SIZE >> useless... > > Hm, we need more than a comment for that - distros enable CC_OPTIMIZE_FOR_SIZE > all the time, for the massive kernel image (and hotpath cache footprint) > savings. Is this fixable? > Actually the current reports from the gcc community is that gcc 4.5.0 + -Os produces a broken kernel even without asm goto: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44129 -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- 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/