From owner-freebsd-arch@FreeBSD.ORG Thu Jun 23 07:49:20 2005 Return-Path: X-Original-To: freebsd-arch@freebsd.org Delivered-To: freebsd-arch@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B3E4016A41C; Thu, 23 Jun 2005 07:49:20 +0000 (GMT) (envelope-from wilkinsa@squash.dsto.defence.gov.au) Received: from digger1.defence.gov.au (digger1.defence.gov.au [203.5.217.4]) by mx1.FreeBSD.org (Postfix) with ESMTP id 31DD243D4C; Thu, 23 Jun 2005 07:49:19 +0000 (GMT) (envelope-from wilkinsa@squash.dsto.defence.gov.au) Received: from ednmsw501.dsto.defence.gov.au (ednmsw501.dsto.defence.gov.au [131.185.2.150]) by digger1.defence.gov.au with ESMTP id j5N7lYqQ024956; Thu, 23 Jun 2005 17:17:34 +0930 (CST) Received: from muttley.dsto.defence.gov.au (unverified) by ednmsw501.dsto.defence.gov.au (Content Technologies SMTPRS 4.3.17) with ESMTP id ; Thu, 23 Jun 2005 17:19:12 +0930 Received: from ednex501.dsto.defence.gov.au (ednex501.dsto.defence.gov.au [131.185.2.81]) by muttley.dsto.defence.gov.au (8.11.3/8.11.3) with ESMTP id j5N7ik012104; Thu, 23 Jun 2005 17:14:46 +0930 (CST) Received: from squash.dsto.defence.gov.au ([131.185.40.212]) by ednex501.dsto.defence.gov.au with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2653.13) id MR6XD6KQ; Thu, 23 Jun 2005 17:14:32 +0930 Received: from squash.dsto.defence.gov.au (localhost [127.0.0.1]) by squash.dsto.defence.gov.au (8.13.3/8.13.3) with ESMTP id j5N7itQl071790; Thu, 23 Jun 2005 17:14:55 +0930 (CST) (envelope-from wilkinsa@squash.dsto.defence.gov.au) Received: (from root@localhost) by squash.dsto.defence.gov.au (8.13.3/8.13.3/Submit) id j5N7irDS071789; Thu, 23 Jun 2005 17:14:54 +0930 (CST) (envelope-from wilkinsa) Date: Thu, 23 Jun 2005 17:14:53 +0930 From: "Wilkinson, Alex" To: Peter Wemm Message-ID: <20050623074453.GA71779@squash.dsto.defence.gov.au> Mail-Followup-To: Peter Wemm , freebsd-arch@freebsd.org, Sue Howard , arch@freebsd.org References: <1e89cd51050616062241e9e201@mail.gmail.com> <200506222323.26666.peter@wemm.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <200506222323.26666.peter@wemm.org> User-Agent: Mutt/1.5.9i Cc: arch@freebsd.org, Sue Howard , freebsd-arch@freebsd.org Subject: Re: Kernel Dump X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Jun 2005 07:49:20 -0000 0n Wed, Jun 22, 2005 at 11:23:25PM -0700, Peter Wemm wrote: >I've just rewritten the AMD64 crashdump support to use ELF like ia64. >In fact, I reused most of the ia64 code. We ran into serious problems >at work, first on the amd64 platform and now also the i386 platform. >The problem is that x86 machines are increasinly having memory holes. >The simplistic dump code has no way to skip the memory hole and tries >to dump things like the AGP frame buffer, pci card MMIO space, >PCI-Express configuration space (this means accessing hardware!!) and >so on. Curious, why is it that x86 creates memory holes in the first place ? - aW