Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756579Ab3JHQyM (ORCPT ); Tue, 8 Oct 2013 12:54:12 -0400 Received: from mx1.redhat.com ([209.132.183.28]:21009 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754195Ab3JHQyH (ORCPT ); Tue, 8 Oct 2013 12:54:07 -0400 Date: Tue, 8 Oct 2013 18:46:26 +0200 From: Oleg Nesterov To: Fengguang Wu Cc: Linus Torvalds , Peter Zijlstra , Ingo Molnar , Linux Kernel Mailing List Subject: Re: [x86] BUG: unable to handle kernel paging request at 00740060 Message-ID: <20131008164626.GA25696@redhat.com> References: <20131005234430.GA22485@localhost> <20131008075151.GA15689@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131008075151.GA15689@localhost> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 682 Lines: 27 On 10/08, Fengguang Wu wrote: > > Yeah, this will quiet the oops messages: > > -#ifdef CC_HAVE_ASM_GOTO > +#if 0 Can't understand how this can affect task_work.c... Well, task_work_add() does test_and_set_bit(), so that patch actually changes this code, but still I can't see how this can lead to these OOPSes. Fengguang, I do not think this will help, but just in case. Could you show the result of $ kernel/task_work.s ? Oleg. -- 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/