Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758063AbYJPRoe (ORCPT ); Thu, 16 Oct 2008 13:44:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755183AbYJPRn6 (ORCPT ); Thu, 16 Oct 2008 13:43:58 -0400 Received: from rv-out-0506.google.com ([209.85.198.236]:14069 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754146AbYJPRn4 (ORCPT ); Thu, 16 Oct 2008 13:43:56 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references:x-google-sender-auth; b=dJpOfvqaYk5KbH26BWd9G4yFZfGofL7SWinpS9jz1Y2LpEYyV824aqGLkYpi6cyLkG B0NLTBgYw+fUcV5I8zFOu4BIRzS1rdT0191WNj4dK1xdLP76JMafHtwVRpZDX62yTANQ FlBjH6tfuqjX6JBywO2R8fTeBfn6evfhQKxik= Message-ID: <86802c440810161043k4c4bf6e6x4f5a70c54c53ca3b@mail.gmail.com> Date: Thu, 16 Oct 2008 10:43:56 -0700 From: "Yinghai Lu" To: bob.montgomery@hp.com Subject: Re: [PATCH] disable CPU side GART accesses Cc: "Ingo Molnar" , "linux-kernel@vger.kernel.org" , "vojtech@suse.cz" , "Linus Torvalds" , "chandru@in.ibm.com" , "Joerg Roedel" , "FUJITA Tomonori" , "Jesse Barnes" , "Pavel Machek" In-Reply-To: <1224176445.2215.258.camel@amd.troyhebe> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <1224107317.2215.238.camel@amd.troyhebe> <20081015234842.GA10999@elte.hu> <48F68940.40409@kernel.org> <1224176445.2215.258.camel@amd.troyhebe> X-Google-Sender-Auth: b0a0b6d71cc8e77f Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 719 Lines: 16 On Thu, Oct 16, 2008 at 10:00 AM, Bob Montgomery wrote: > > The problem occurs when the copy operation reads from the GART aperture > (iommu window) and wakes up the GART translation hardware. This patch > stops that by telling the GART to ignore addresses that come from the > CPU and to only translate addresses from the IO side. why kdump need to copy those area? those area is supposed to be reserved in e820 table by BIOS or first kernel. YH -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/