From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759072Ab2AFXNc (ORCPT ); Fri, 6 Jan 2012 18:13:32 -0500 Received: from terminus.zytor.com ([198.137.202.10]:56507 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752166Ab2AFXNa (ORCPT ); Fri, 6 Jan 2012 18:13:30 -0500 Message-ID: <4F077FDD.8080201@zytor.com> Date: Fri, 06 Jan 2012 15:12:29 -0800 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:8.0) Gecko/20111115 Thunderbird/8.0 MIME-Version: 1.0 To: Andi Kleen CC: Jan Beulich , mingo@elte.hu, tglx@linutronix.de, linux-kernel@vger.kernel.org Subject: Re: x86-64: memset()/memcpy() not fully standards compliant References: <20120105182846.GQ11715@one.firstfloor.org> <4F0630CC.7050001@zytor.com> <20120106014748.GS11715@one.firstfloor.org> <4F06566B.8080708@zytor.com> <20120106094922.GU11715@one.firstfloor.org> <4F06D979020000780006AC49@nat.nue.novell.com> <20120106103734.GV11715@one.firstfloor.org> <4F06DFEF020000780006AC84@nat28.tlf.novell.com> <20120106110845.GW11715@one.firstfloor.org> <4F06F640020000780006ACDE@nat28.tlf.novell.com> <20120106194400.GX11715@one.firstfloor.org> In-Reply-To: <20120106194400.GX11715@one.firstfloor.org> X-Enigmail-Version: 1.3.4 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 01/06/2012 11:44 AM, Andi Kleen wrote: >> enough beyond 292G. At some later point ->node_page_cgroup[] >> also exceeds 4G. Finally, the phys-to-machine mapping (which gets >> resized during boot) exceeds 4G when crossing the 2T boundary. > > Ok it's moot then because the old systems with problem didn't have > that much memory. So you could do without an errata workaround > and just extend the moves at the minor cost of a few prefixes > (I think that is what you did in your patch) > That seems like the way to go unless we can identify a real problem. -hpa