Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763651AbXJPAPm (ORCPT ); Mon, 15 Oct 2007 20:15:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754767AbXJPAPd (ORCPT ); Mon, 15 Oct 2007 20:15:33 -0400 Received: from terminus.zytor.com ([198.137.202.10]:40508 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753701AbXJPAPd (ORCPT ); Mon, 15 Oct 2007 20:15:33 -0400 Message-ID: <471401AF.4090802@zytor.com> Date: Mon, 15 Oct 2007 17:11:27 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.5 (X11/20070727) MIME-Version: 1.0 To: Mikulas Patocka CC: Arjan van de Ven , Nick Piggin , Linux Kernel Mailing List Subject: Re: LFENCE instruction (was: [rfc][patch 3/3] x86: optimise barriers) References: <20071015143732.01d99af8@laptopd505.fenrus.org> In-Reply-To: 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: 529 Lines: 16 Mikulas Patocka wrote: > > I know about unordered stores (movnti & similar) --- they basically use > write-combining method on memory that is normally write-back --- and they > need sfence. But which one instruction does unordered load and needs > lefence? > PREFETCHNTA. -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/