From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 16 Sep 2001 04:08:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 16 Sep 2001 04:08:47 -0400 Received: from app79.hitnet.RWTH-Aachen.DE ([137.226.181.79]:20746 "EHLO moria.gondor.com") by vger.kernel.org with ESMTP id ; Sun, 16 Sep 2001 04:08:34 -0400 Date: Sun, 16 Sep 2001 10:08:34 +0200 From: Jan Niehusmann To: Steffen Persvold Cc: Petr Vandrovec , linux-kernel@vger.kernel.org, VDA@port.imtp.ilyichevsk.odessa.ua, alan@lxorguk.ukuu.org.uk Subject: Re: Athlon: Try this (was: Re: Athlon bug stomping #2) Message-ID: <20010916100834.A590@gondor.com> In-Reply-To: <1292125035.20010914214303@port.imtp.ilyichevsk.odessa.ua> <20010916035207.C7542@ppc.vc.cvut.cz> <3BA4530D.A3378F41@scali.no> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3BA4530D.A3378F41@scali.no> User-Agent: Mutt/1.3.20i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Sep 16, 2001 at 09:21:49AM +0200, Steffen Persvold wrote: > I also have a question; if "movntq; sfence" type of memory copy can cause data > corruption in kernel space, it can in theory also do so in user space right ? > So, if I'm right this bug could also be on machines running a 2.2 kernel with > userspace programs using 3DNow (or SSE even) instructions. Sure. I did crash a computer running an old kernel (not 2.2 but 2.4.0-testX without the optimised fast_copy_page) from a non-privileged user space program containing the same code as the optimised fast_copy_page. Jan