From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754305AbXFWJDa (ORCPT ); Sat, 23 Jun 2007 05:03:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752987AbXFWJDW (ORCPT ); Sat, 23 Jun 2007 05:03:22 -0400 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:39061 "EHLO the-village.bc.nu" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752748AbXFWJDV (ORCPT ); Sat, 23 Jun 2007 05:03:21 -0400 Date: Sat, 23 Jun 2007 10:08:24 +0100 From: Alan Cox To: Andi Kleen Cc: "Eric W. Biederman" , Muli Ben-Yehuda , Yinghai Lu , Andrew Morton , Vivek Goyal , Linux Kernel Mailing List Subject: Re: [PATCH] x86-64: disable the GART before allocate aperture Message-ID: <20070623100824.3d96186e@the-village.bc.nu> In-Reply-To: <200706230214.02535.ak@suse.de> References: <200706221219.16243.yinghai.lu@sun.com> <20070622231951.4d516215@the-village.bc.nu> <200706230214.02535.ak@suse.de> X-Mailer: Claws Mail 2.9.1 (GTK+ 2.10.8; i386-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > But I doubt this was YH's problem - the panic kernel memory > is always reserved and there shouldn't be any ongoing DMAs in this > area anyways. And what happens outside the kdump kernel shouldn't matter. In the kdump case it looks like there is still DMA going on through the GART on some systems when kdump zaps it.