From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754556Ab0HXJDj (ORCPT ); Tue, 24 Aug 2010 05:03:39 -0400 Received: from hera.kernel.org ([140.211.167.34]:47661 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754507Ab0HXJDi (ORCPT ); Tue, 24 Aug 2010 05:03:38 -0400 Message-ID: <4C73899A.304@kernel.org> Date: Tue, 24 Aug 2010 10:58:02 +0200 From: Tejun Heo User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9.2.8) Gecko/20100802 Thunderbird/3.1.2 MIME-Version: 1.0 To: Sergey Senozhatsky CC: Andrew Morton , Ingo Molnar , "H. Peter Anvin" , linux-kernel@vger.kernel.org Subject: Re: general protection fault: 0000 [#1] PREEMPT SMP References: <20100813134756.GA5235@swordfish.minsk.epam.com> In-Reply-To: <20100813134756.GA5235@swordfish.minsk.epam.com> X-Enigmail-Version: 1.1.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.3 (hera.kernel.org [127.0.0.1]); Tue, 24 Aug 2010 09:03:02 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On 08/13/2010 03:47 PM, Sergey Senozhatsky wrote: > [ 29.943019] [] lock_acquire+0x97/0xb6 .. > [ 29.943257] [] _raw_spin_lock_irqsave+0x4e/0x60 .. > [ 29.943376] [] percpu_counter_hotcpu_callback+0x3e/0x93 It's getting gpf at spin_lock_irqsave(&fbc->lock) in percpu_counter_hotplug_callback(). percpu_counter keeps track of all the allocated percpu counters and walk them on cpu up/down events. It's most likely one of its users freed or corrupted the percpu counter structure without properly destroying it. Adding debugobj is probably the best way to track down the offending user. Thanks. -- tejun