From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta7.messagelabs.com (mail6.bemta7.messagelabs.com [216.82.255.55]) by kanga.kvack.org (Postfix) with ESMTP id 07324900194 for ; Wed, 22 Jun 2011 16:26:05 -0400 (EDT) Message-ID: <4E024FC5.6020707@zytor.com> Date: Wed, 22 Jun 2011 13:25:41 -0700 From: "H. Peter Anvin" MIME-Version: 1.0 Subject: Re: [PATCH v2 0/3] support for broken memory modules (BadRAM) References: <1308741534-6846-1-git-send-email-sassmann@kpanic.de> <20110622110034.89ee399c.akpm@linux-foundation.org> <20110622182445.GG3263@one.firstfloor.org> <20110622113851.471f116f.akpm@linux-foundation.org> <20110622185645.GH3263@one.firstfloor.org> <4E023CE3.70100@zytor.com> <20110622191558.GI3263@one.firstfloor.org> In-Reply-To: <20110622191558.GI3263@one.firstfloor.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Andi Kleen Cc: Andrew Morton , Stefan Assmann , linux-mm@kvack.org, linux-kernel@vger.kernel.org, tony.luck@intel.com, mingo@elte.hu, rick@vanrein.org, rdunlap@xenotime.net, Nancy Yuen , Michael Ditto On 06/22/2011 12:15 PM, Andi Kleen wrote: > On Wed, Jun 22, 2011 at 12:05:07PM -0700, H. Peter Anvin wrote: >> On 06/22/2011 11:56 AM, Andi Kleen wrote: >>> >>> You'll always have multiple ways. Whatever magic you come up for >>> the google BIOS or for EFI won't help the majority of users with >>> old crufty legacy BIOS. >>> >> >> I don't think this has anything to do with this. > > Please elaborate. > > How would you pass the bad page information instead in a fully backwards > compatible way? > Depends on what you mean with "fully backward compatible". In some ways this is a nonsense statement since if we create anything new older kernels will not run. However, the other discussions in this thread have been about injecting data in kernel-specific data structures and thus aren't dependent on the firmware layer used. The fully backward compatible way is "memmap=
$". -hpa -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org