From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264240AbTLEQBQ (ORCPT ); Fri, 5 Dec 2003 11:01:16 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264229AbTLEQBQ (ORCPT ); Fri, 5 Dec 2003 11:01:16 -0500 Received: from modemcable067.88-70-69.mc.videotron.ca ([69.70.88.67]:41602 "EHLO montezuma.fsmlabs.com") by vger.kernel.org with ESMTP id S264256AbTLEQBN (ORCPT ); Fri, 5 Dec 2003 11:01:13 -0500 Date: Fri, 5 Dec 2003 11:00:11 -0500 (EST) From: Zwane Mwaikambo To: Paul Rolland cc: linux-smp@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: WARNING: MP table in the EBDA can be UNSAFE In-Reply-To: <200312051518.hB5FIQD29335@tag.witbe.net> Message-ID: References: <200312051518.hB5FIQD29335@tag.witbe.net> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 5 Dec 2003, Paul Rolland wrote: > Our Linux, running on an IBM X-Series 445, says : > (excerpt from dmesg) : > > found SMP MP-table at 0009dd40 > hm, page 0009d000 reserved twice. > hm, page 0009e000 reserved twice. > hm, page 0009e000 reserved twice. > hm, page 0009f000 reserved twice. > WARNING: MP table in the EBDA can be UNSAFE, contact linux-smp@vger.kernel.org if you experience SMP problems! This bit is ok and can be safely ignored. > LAPIC (acpi_id[0x0000] id[0x0] enabled[1]) > CPU 0 (0x0000) enabledProcessor #0 Pentium 4(tm) XEON(tm) APIC version 16 > > LAPIC (acpi_id[0x0001] id[0x12] enabled[1]) > CPU 1 (0x1200) enabled<4>Processor #18 INVALID - (Max ID: 16). > LAPIC (acpi_id[0x0002] id[0x20] enabled[1]) > CPU 1 (0x2000) enabled<4>Processor #32 INVALID - (Max ID: 16). > LAPIC (acpi_id[0x0003] id[0x32] enabled[1]) > CPU 1 (0x3200) enabled<4>Processor #50 INVALID - (Max ID: 16). > > Is there any known solution to re-enable the CPU 1, CPU 2 and CPU 3 ? > > Is this an IBM bug ? Did you compile your kernel with the following option? IBM x440 Summit/EXA support CONFIG_X86_SUMMIT