From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764222AbZAOTub (ORCPT ); Thu, 15 Jan 2009 14:50:31 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754406AbZAOTuX (ORCPT ); Thu, 15 Jan 2009 14:50:23 -0500 Received: from mail-bw0-f21.google.com ([209.85.218.21]:41081 "EHLO mail-bw0-f21.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752610AbZAOTuV (ORCPT ); Thu, 15 Jan 2009 14:50:21 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:references; b=wJY66g8IBpvlyqtV/Rnh54RvFC1oLWAC97BIMhE/JnDqTZnvX2U12N01UHx/9JiWSL UXfrvCrT9DfWRw8uHDpgh6VApOj/+nx6AxQtr8kQuxSlJe5QoDzIvMWb8z+fktrIaStn Qii/WPTcDpPOc2QrGhowH86JIp0NBrcupLJhk= Message-ID: Date: Thu, 15 Jan 2009 14:50:17 -0500 From: "James Kirin" To: "Yinghai Lu" Subject: Re: memory beyond4GB invisible to the system even though CONFIG_HIGHMEM64G=y Cc: "Roland Dreier" , linux-kernel@vger.kernel.org In-Reply-To: <86802c440901132207l433227d9nf149506012a5721e@mail.gmail.com> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_17418_19001855.1232049017980" References: <86802c440901132207l433227d9nf149506012a5721e@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ------=_Part_17418_19001855.1232049017980 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Hi Yinghai, > please do > 1. boot linux with "disable_mtrr_trim" in grub.conf etc > 2. after booting input: > echo "base=0x100000000 size=0x20000000 type=write-back" >/proc/mtrr Thank you for your suggestion. Unfortunately, booting with disable_mtrr_trim leads to a kernel panic: [] kernel_thread_helper+0x7/0x1c =========== Code: 0c 31 d2 89 e8 e8 c2 f4 ff ff 89 c3 eb 8e 8b 85 cc 00 00 00 89 44 24 10 83 bd ec 00 01 00 04 0f 84 cf 00 00 00 8b 9d f0 00 01 00 <8b> 43 10 3b 43 0c 0f 84 d5 00 00 00 8b 53 10 8b 85 ec 00 01 00 EIP: [