From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 4.0.0 (2022-12-14) on finch.gentoo.org X-Spam-Level: * X-Spam-Status: No, score=1.2 required=5.0 tests=DMARC_NONE,MAILING_LIST_MULTI, RDNS_NONE autolearn=no autolearn_force=no version=4.0.0 Received: from inventor.gentoo.org (unknown [216.223.235.2]) by chiba.3jane.net (Postfix) with ESMTP id 018642007F06 for ; Wed, 23 Jan 2002 13:11:48 -0600 (CST) Received: from localhost (localhost [127.0.0.1]) by inventor.gentoo.org (Postfix) with ESMTP id 28CC11473E2E; Wed, 23 Jan 2002 12:13:04 -0700 (MST) Subject: Re: [gentoo-dev] Interview with AMD reg. Large Pages Bug From: Daniel Robbins To: gentoo-dev@gentoo.org, nero24@planet3dnow.de In-Reply-To: <003601c1a43f$c36fe630$0a03fea9@computer> References: <003601c1a43f$c36fe630$0a03fea9@computer> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Mailer: Evolution/1.0.1 Date: 23 Jan 2002 12:13:04 -0700 Message-Id: <1011813184.12578.13.camel@inventor.gentoo.org> Mime-Version: 1.0 Sender: gentoo-dev-admin@gentoo.org Errors-To: gentoo-dev-admin@gentoo.org X-BeenThere: gentoo-dev@gentoo.org X-Mailman-Version: 2.0.6 Precedence: bulk Reply-To: gentoo-dev@gentoo.org List-Help: List-Post: List-Subscribe: , List-Id: Gentoo Linux developer list List-Unsubscribe: , List-Archive: X-Archives-Salt: 2b517f1f-10ba-4988-a996-8f36b4120188 X-Archives-Hash: 0338bd6bc3a4382a9c5d1105f9c5a130 On Wed, 2002-01-23 at 11:57, Nero24 (Planet 3DNow!) wrote: > Hello Chris, >=20 > regarding the Large Pages Bug with Windows 2000 and Linux there are > different version out, whether the bug is fixed in Palomino or not. So we > decided to stop rumoring and asked AMD public relations manager Jan G=FCt= ter. > What he said you can read at Planet 3DNow! > www.planet3dnow.de/cgi-bin/newspub/viewnews.cgi?category=3D1&id=3D1011807= 957 The INVPLG CPU bug is not the particular issue being discussed here (yes, this has all been very confusing). The issue we are talking about is a subtle interaction between speculative writes, extended paging and the GART (not a CPU bug, this was a misunderstanding). This quirk results in corruption of AGP and system memory, and it's really the responsibility of the Linux kernel and drivers to make sure that this issue doesn't happen. See my post at http://www.geocrawler.com/lists/3/Linux/35/75/7626960/ which contains an update including an official explantion from AMD of a problem that can happen and may be happening to Linux people. Follow the thread and you'll see that it's a real issue. It is a very interesting problem. The Linux kernel developers are currently investigating this speculative write/GART interaction to see if it could affect Linux users. So far, the consensus seems to be that it *does* affect Linux AGP users and developers are currently trying to find a solution that doesn't not hurt performance as "mem=3Dnopentium" (turning off extended translation) does. Best Regards, --=20 Daniel Robbins Chief Architect/President http://www.gentoo.org=20 Gentoo Technologies, Inc.