From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta12.messagelabs.com (mail6.bemta12.messagelabs.com [216.82.250.247]) by kanga.kvack.org (Postfix) with ESMTP id 3B0F790023D for ; Fri, 24 Jun 2011 13:15:04 -0400 (EDT) Message-ID: <4E04C5EC.2090602@zytor.com> Date: Fri, 24 Jun 2011 10:14:20 -0700 From: "H. Peter Anvin" MIME-Version: 1.0 Subject: Re: [PATCH v2 0/3] support for broken memory modules (BadRAM) References: <20110623133950.GB28333@srcf.ucam.org> <4E0348E0.7050808@kpanic.de> <20110623141222.GA30003@srcf.ucam.org> <4E035DD1.1030603@kpanic.de> <20110623170014.GN3263@one.firstfloor.org> <987664A83D2D224EAE907B061CE93D5301E938F2FD@orsmsx505.amr.corp.intel.com> <20110624080535.GA19966@phantom.vanrein.org> <4E04B848.6000908@zytor.com> <987664A83D2D224EAE907B061CE93D5301E942ED99@orsmsx505.amr.corp.intel.com> <20110624165612.GC31887@phantom.vanrein.org> In-Reply-To: <20110624165612.GC31887@phantom.vanrein.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Rick van Rein Cc: "Luck, Tony" , Craig Bergstrom , Andi Kleen , Stefan Assmann , Matthew Garrett , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" , "mingo@elte.hu" , "rdunlap@xenotime.net" On 06/24/2011 09:56 AM, Rick van Rein wrote: > Hello, > >> Does it scale? [...] Perhaps we may end up with a composite solution. > > If I had my way, there would be an extension to the e820 format to allow > the BadRAM patterns to be specified. Since the extension with bad page > information is specific to boot loader interaction, this would work in > exactly those cases that are covered by the current situation. > Yes, a different table might be worthwhile. Another question, however, is what does this look like at runtime. In particular, if I'm not mistaken hwpoison will create struct pages for these non-memory pages, which seems undesirable... -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