Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755090AbaAWWN2 (ORCPT ); Thu, 23 Jan 2014 17:13:28 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48240 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751141AbaAWWN0 (ORCPT ); Thu, 23 Jan 2014 17:13:26 -0500 Date: Thu, 23 Jan 2014 17:13:16 -0500 From: Dave Jones To: x86@kernel.org Cc: Linux Kernel Subject: disabled APICs being counted as processors ? Message-ID: <20140123221316.GA23367@redhat.com> Mail-Followup-To: Dave Jones , x86@kernel.org, Linux Kernel MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I have a system with 4 cores (configured with CONFIG_NR_CPUS=4) that shows during boot.. [ 0.000000] smpboot: 8 Processors exceeds NR_CPUS limit of 4 it looks like this is because.. [ 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[0xff] disabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x06] lapic_id[0xff] disabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x07] lapic_id[0xff] disabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x08] lapic_id[0xff] disabled) Should the CPU counting code be ignoring those disabled APICs ? Dave -- 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/