From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753168AbYIHQrp (ORCPT ); Mon, 8 Sep 2008 12:47:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753218AbYIHQrN (ORCPT ); Mon, 8 Sep 2008 12:47:13 -0400 Received: from gw.goop.org ([64.81.55.164]:41341 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753164AbYIHQrM (ORCPT ); Mon, 8 Sep 2008 12:47:12 -0400 Message-ID: <48C5570B.7050109@goop.org> Date: Mon, 08 Sep 2008 09:47:07 -0700 From: Jeremy Fitzhardinge User-Agent: Thunderbird 2.0.0.16 (X11/20080723) MIME-Version: 1.0 To: Nick Piggin CC: Alan Jenkins , Ingo Molnar , linux-kernel@vger.kernel.org, Hugh Dickens , "H. Peter Anvin" , =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= Subject: Re: [PATCH 0 of 3] Low memory corruption detection and workaround References: <48C3F237.1020503@tuffmail.co.uk> <200809082123.04780.nickpiggin@yahoo.com.au> In-Reply-To: <200809082123.04780.nickpiggin@yahoo.com.au> X-Enigmail-Version: 0.95.7 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 Nick Piggin wrote: > Why not high memory as well? We put page tables there too... > Well, the specific problem is that the BIOS appears to corrupt low memory. It might corrupt other memory anywhere, but that would be pretty pathologically evil. The assumption is that it gets away with it because its memory that Windows doesn't otherwise use or something. > (rant: why can we still buy non-ECC memory?) > Well, it wouldn't help in this case. It's not random hardware bit-flipping. J