Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756124Ab0KWS0u (ORCPT ); Tue, 23 Nov 2010 13:26:50 -0500 Received: from canuck.infradead.org ([134.117.69.58]:53644 "EHLO canuck.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751227Ab0KWS0t convert rfc822-to-8bit (ORCPT ); Tue, 23 Nov 2010 13:26:49 -0500 Subject: Re: [PATCH] x86, perf, nmi: Disable perf if counters are not accessable From: Peter Zijlstra To: sedat.dilek@gmail.com Cc: Don Zickus , LKML In-Reply-To: References: <20101123165657.GF18100@redhat.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Date: Tue, 23 Nov 2010 19:27:07 +0100 Message-ID: <1290536827.2072.417.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 813 Lines: 18 On Tue, 2010-11-23 at 19:21 +0100, Sedat Dilek wrote: > Due to BIOS l(ocal)apic is not possible: > > # dmesg | grep -i apic > [ 0.000000] Using APIC driver default > [ 0.000000] Local APIC disabled by BIOS -- you can enable it with "lapic" > [ 0.000000] APIC: disable apic facility > [ 0.000000] APIC: switched to apic NOOP > [ 0.008891] no APIC, boot with the "lapic" boot parameter to force-enable it. > [ 0.036141] Local APIC not detected. Using dummy APIC emulation. Have you tried booting with "lapic" as the second last msg suggests you do? -- 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/