From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752179Ab2LPS3E (ORCPT ); Sun, 16 Dec 2012 13:29:04 -0500 Received: from out4-smtp.messagingengine.com ([66.111.4.28]:34934 "EHLO out4-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751093Ab2LPS3C (ORCPT ); Sun, 16 Dec 2012 13:29:02 -0500 X-Sasl-enc: k648z1w2vzEZPWn3AsSXorho4r60tVQbPH4Y3tf3qbK/ 1355682541 Message-ID: <50CE12EB.1050804@itwm.fraunhofer.de> Date: Sun, 16 Dec 2012 19:28:59 +0100 From: Bernd Schubert User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121010 Thunderbird/16.0.1 MIME-Version: 1.0 To: Yinghai Lu CC: Ingo Molnar , linux-kernel@vger.kernel.org Subject: Re: [regression] 3.7 ends in APIC panic References: <50CB3EAB.309@itwm.fraunhofer.de> <50CE0C82.20708@itwm.fraunhofer.de> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/16/2012 07:07 PM, Yinghai Lu wrote: > On Sun, Dec 16, 2012 at 10:01 AM, Bernd Schubert > wrote: >>> can you post your .config for v3.7 ? >>> >>> wonder if you have x2apic in .config >> >> Which setting is it? Config is attached. > > your config does not have > > CONFIG_X86_X2APIC=y > > set. > > please enable that. > > your BIOS pre-enable x2apic somehow, so you must have x2apic enabled in kernel. > > it x2apic really can not be re-enabled by kernel, kernel would disable > x2apic automatically. Thanks! CONFIG_X86_X2APIC depends on CONFIG_IRQ_REMAP, which I disabled as it is marked as experimental and as this is my desktop system. So CONFIG_X86_X2APIC also got unset automatically. Will test a new kernel build in the morning. Thanks, Bernd