From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263651AbTJRAMQ (ORCPT ); Fri, 17 Oct 2003 20:12:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263636AbTJRAMQ (ORCPT ); Fri, 17 Oct 2003 20:12:16 -0400 Received: from holomorphy.com ([66.224.33.161]:9866 "EHLO holomorphy") by vger.kernel.org with ESMTP id S263628AbTJRAMO (ORCPT ); Fri, 17 Oct 2003 20:12:14 -0400 Date: Fri, 17 Oct 2003 17:15:11 -0700 From: William Lee Irwin III To: Andrew Morton Cc: Bjorn Helgaas , linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC] prevent "dd if=/dev/mem" crash Message-ID: <20031018001511.GG25291@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Andrew Morton , Bjorn Helgaas , linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org References: <200310171610.36569.bjorn.helgaas@hp.com> <20031017155028.2e98b307.akpm@osdl.org> <200310171725.10883.bjorn.helgaas@hp.com> <20031017165543.2f7e9d49.akpm@osdl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20031017165543.2f7e9d49.akpm@osdl.org> Organization: The Domain of Holomorphy User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 17, 2003 at 04:55:43PM -0700, Andrew Morton wrote: > This code was conceived before my time and I don't recall seeing much > discussion, so this is all guesswork.. > I'd say that the high_memory test _is_ superfluous and that if anyone > cared, we would remove it and establish a temporary pte against the address if > it was outside the direct-mapped area. But nobody cares enough to have > done anything about it. I've heard crash dump people mention it and am trying to convince them to post their fix(es) here. =) -- wli