Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758783AbXJKVap (ORCPT ); Thu, 11 Oct 2007 17:30:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755141AbXJKVai (ORCPT ); Thu, 11 Oct 2007 17:30:38 -0400 Received: from terminus.zytor.com ([198.137.202.10]:38730 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754438AbXJKVah (ORCPT ); Thu, 11 Oct 2007 17:30:37 -0400 Message-ID: <470E95E9.5060703@zytor.com> Date: Thu, 11 Oct 2007 14:30:17 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.5 (X11/20070727) MIME-Version: 1.0 To: Andi Kleen CC: zach@vmware.com, patches@x86-64.org, linux-kernel@vger.kernel.org, Thomas Gleixner Subject: Re: [PATCH] [6/12] x86_64: Early segment setup for VT References: <20070809241.425881000@suse.de> <20070809124133.D559014F3B@wotan.suse.de> In-Reply-To: <20070809124133.D559014F3B@wotan.suse.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 848 Lines: 25 Andi Kleen wrote: > From: Zachary Amsden > > VT is very picky about when it can enter execution. > Get all segments setup and get LDT and TR into valid state to allow > VT execution under VMware and KVM (untested). > > This makes the boot decompression run under VT, which makes it several > orders of magnitude faster on 64-bit Intel hardware. > > Before, I was seeing times up to a minute or more to decompress a 1.3MB kernel > on a very fast box. > > Signed-off-by: Zachary Amsden > Signed-off-by: Andi Kleen > Makes a lot of sense to me. -hpa - 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/