Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750824AbWCOK5C (ORCPT ); Wed, 15 Mar 2006 05:57:02 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750873AbWCOK5B (ORCPT ); Wed, 15 Mar 2006 05:57:01 -0500 Received: from liaag1ac.mx.compuserve.com ([149.174.40.29]:11667 "EHLO liaag1ac.mx.compuserve.com") by vger.kernel.org with ESMTP id S1750824AbWCOK5A (ORCPT ); Wed, 15 Mar 2006 05:57:00 -0500 Date: Wed, 15 Mar 2006 05:50:39 -0500 From: Chuck Ebbert <76306.1226@compuserve.com> Subject: Re: More than 8 CPUs detected and CONFIG_X86_PC cannot handle it on 2.6.16-rc6 To: Krzysztof Oledzki Cc: linux-kernel , Andrew Morton , Ashok Raj Message-ID: <200603150553_MC3-1-BAB1-7C5A@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1339 Lines: 39 In-Reply-To: On Sun, 12 Mar 2006 03:04:40 +0100, Krzysztof Oledzki wrote: > After upgrading to 2.6.16-rc6 I noticed this strange message: > > More than 8 CPUs detected and CONFIG_X86_PC cannot handle it. > Use CONFIG_X86_GENERICARCH or CONFIG_X86_BIGSMP. > > This is a Dell PowerEdge SC1425 with two P4 Xeons with HT enabled (so with > totoal of 4 logical CPUs). In a later message, you wrote: > ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) > Processor #0 15:4 APIC version 20 > ACPI: LAPIC (acpi_id[0x02] lapic_id[0x06] enabled) > Processor #6 15:4 APIC version 20 ^ > ACPI: LAPIC (acpi_id[0x03] lapic_id[0x01] enabled) > Processor #1 15:4 APIC version 20 > ACPI: LAPIC (acpi_id[0x04] lapic_id[0x07] enabled) > Processor #7 15:4 APIC version 20 ^ What processor numbers did you get on 2.6.15.x? Does /proc/cpuinfo show all four CPUs? If you start four CPU-hungry processes, do all four show 100% utilization in top(1)? -- Chuck "Penguins don't come from next door, they come from the Antarctic!" - 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/