Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756059AbYH2Jre (ORCPT ); Fri, 29 Aug 2008 05:47:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751290AbYH2Jr0 (ORCPT ); Fri, 29 Aug 2008 05:47:26 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:56537 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751417AbYH2JrZ (ORCPT ); Fri, 29 Aug 2008 05:47:25 -0400 Date: Fri, 29 Aug 2008 10:25:47 +0100 From: Alan Cox To: Jeremy Fitzhardinge Cc: Yinghai Lu , Ingo Molnar , =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= , Alan Jenkins , Hugh Dickens , "H. Peter Anvin" , Linux Kernel Mailing List Subject: Re: [PATCH RFC] x86: check for and defend against BIOS memory corruption Message-ID: <20080829102547.655440bf@lxorguk.ukuu.org.uk> In-Reply-To: <48B76CE0.5010309@goop.org> References: <48B701FB.2020905@goop.org> <86802c440808281849nb972d64te89894077ea9f33c@mail.gmail.com> <48B76CE0.5010309@goop.org> X-Mailer: Claws Mail 3.5.0 (GTK+ 2.12.11; x86_64-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 948 Lines: 23 > >> - Clears the reserved memory so we can observe changes to it. You ought to pick different values on different runs 0x00, 0xFF, 0xAA, 0x55 etc... > Yeah, OK, but I think it should default to ON for now. The problem is > that we had two very different systems (Sony Vaio and Intel desktop) So a zillion people should lose a chunk of RAM because of what is probably an obscure bug in a single version of a piece of SMM code on two systems total ? That appears to be totally out of proportion - plus the defaults are *irrelevant* for mass user coverage. If you want large scale coverage ask the Fedora, OpenSuSE and Ubuntu people to turn it on for a testing kernel release and report back. Alan -- 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/