From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755925Ab0IPSyu (ORCPT ); Thu, 16 Sep 2010 14:54:50 -0400 Received: from torres.zugschlus.de ([85.214.131.164]:37253 "EHLO torres.zugschlus.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753139Ab0IPSyt (ORCPT ); Thu, 16 Sep 2010 14:54:49 -0400 Date: Thu, 16 Sep 2010 20:54:48 +0200 From: Marc Haber To: linux-kernel@vger.kernel.org Subject: Kernel configuration influence on local APIC Message-ID: <20100916185448.GA25947@torres.zugschlus.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I have a system that needs the "lapic" option on the kernel command line when I run the system with the 2.6.35.4 kernel that I use on most of my servers. However, when I use grml as a rescue system on the box, the system runs fine without this kernel command line. The daily grml image that I have been trying is from last week and uses a 2.6.35.4 image as well. The grml system has [ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x02] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x04] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x06] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x05] lapic_id[0x84] disabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x06] lapic_id[0x85] disabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x07] lapic_id[0x86] disabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x08] lapic_id[0x87] disabled) [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1]) in its dmesg, but CONFIG_X86_LOCAL_APIC=y is set - does that mean that the lapic is disabled on grml? What do I lose when I run the server without the lapic, and which kernel setting should I play with to get the productive kernel to work with the lapic enabled? Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Mannheim, Germany | lose things." Winona Ryder | Fon: *49 621 72739834 Nordisch by Nature | How to make an American Quilt | Fax: *49 3221 2323190