From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758020AbYFIIJv (ORCPT ); Mon, 9 Jun 2008 04:09:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755111AbYFIIJg (ORCPT ); Mon, 9 Jun 2008 04:09:36 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:53968 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751978AbYFIIJe (ORCPT ); Mon, 9 Jun 2008 04:09:34 -0400 Date: Mon, 9 Jun 2008 01:09:17 -0700 From: Andrew Morton To: Peter Zijlstra , Ingo Molnar Cc: linux-kernel@vger.kernel.org Subject: lockdep internal warning in linux-next Message-Id: <20080609010917.c00d5225.akpm@linux-foundation.org> X-Mailer: Sylpheed 2.4.8 (GTK+ 2.12.5; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When I boot the 2-way using http://userweb.kernel.org/~akpm/config-vmm.txt I see: Write protecting the kernel text: 2872k Write protecting the kernel read-only data: 1012k hostname used greatest stack depth: 6808 bytes left mount used greatest stack depth: 6048 bytes left hotplug used greatest stack depth: 5568 bytes left ------------[ cut here ]------------ WARNING: at kernel/lockdep.c:2680 check_flags+0x162/0x180() Modules linked in: Pid: 5, comm: watchdog/0 Not tainted 2.6.26-rc5 #3 [] warn_on_slowpath+0x54/0x70 [] ? trace_hardirqs_on+0xb/0x10 [] ? trace_hardirqs_on_caller+0xd4/0x160 [] ? trace_hardirqs_on+0xb/0x10 [] ? _spin_unlock_irq+0x22/0x30 [] ? sched_clock_cpu+0xbc/0x140 [] check_flags+0x162/0x180 [] lock_acquire+0x39/0xa0 [] _read_lock+0x2c/0x40 [] ? watchdog+0xb1/0x1d0 [] watchdog+0xb1/0x1d0 [] ? complete+0x46/0x60 [] ? watchdog+0x0/0x1d0 [] kthread+0x42/0x70 [] ? kthread+0x0/0x70 [] kernel_thread_helper+0x7/0x14 ======================= ---[ end trace 8151399cdd960ac9 ]--- possible reason: unannotated irqs-on. irq event stamp: 14 hardirqs last enabled at (13): [] trace_hardirqs_on+0xb/0x10 hardirqs last disabled at (14): [] trace_hardirqs_off+0xb/0x10 softirqs last enabled at (0): [] copy_process+0x27c/0x10b0 softirqs last disabled at (0): [<00000000>] 0x0 EXT3 FS on hdc2, internal journal Adding 1020116k swap on /dev/hdc3. Priority:-1 extents:1 across:1020116k (but at least it all boots and runs - small blessings)