From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754089Ab2EINxq (ORCPT ); Wed, 9 May 2012 09:53:46 -0400 Received: from mga14.intel.com ([143.182.124.37]:13645 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750797Ab2EINxp (ORCPT ); Wed, 9 May 2012 09:53:45 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.71,315,1320652800"; d="scan'208";a="98095297" Message-ID: <4FAA76E7.1070807@linux.intel.com> Date: Wed, 09 May 2012 06:53:43 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20120329 Thunderbird/11.0.1 MIME-Version: 1.0 To: Jarkko Sakkinen CC: Paolo Bonzini , linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org, Michal Marek , Sam Ravnborg , Joseph Cihula , Shane Wang Subject: Re: [PATCH 04/23] x86, realmode: Move reboot_32.S to unified realmode code References: <1336501366-28617-1-git-send-email-jarkko.sakkinen@intel.com> <1336501366-28617-5-git-send-email-jarkko.sakkinen@intel.com> <4FAA18F1.6080508@redhat.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/09/2012 05:37 AM, Jarkko Sakkinen wrote: > > It's true that it doesn't matter much but still it is a > regression. And it doesn't cause any kind of overhead > or bloat to fix this. > However, the big thing is that we jump to the BIOS with caches off. I personally think it is the wrong thing to do (we don't jump to the real reset vector anyway) but it is what has been tested for a long time. -hpa