From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030501AbXDWRHo (ORCPT ); Mon, 23 Apr 2007 13:07:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030370AbXDWRHo (ORCPT ); Mon, 23 Apr 2007 13:07:44 -0400 Received: from mx1.redhat.com ([66.187.233.31]:59616 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030501AbXDWRHn (ORCPT ); Mon, 23 Apr 2007 13:07:43 -0400 Date: Mon, 23 Apr 2007 13:07:42 -0400 From: Dave Jones To: Linux Kernel Subject: serial8250 lockdep report from 2.6.21-rc7 Message-ID: <20070423170742.GA9823@redhat.com> Mail-Followup-To: Dave Jones , Linux Kernel MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.14 (2007-02-12) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org ================================= [ INFO: inconsistent lock state ] 2.6.20-1.3094.fc7 #1 --------------------------------- inconsistent {hardirq-on-W} -> {in-hardirq-W} usage. swapper/0 [HC1[1]:SC0[0]:HE0:SE1] takes: (&port_lock_key){++..}, at: [] serial8250_interrupt+0x4a/0xe0 {hardirq-on-W} state was registered at: [] __lock_acquire+0x448/0xba9 [] lock_acquire+0x56/0x6f [] _spin_lock+0x2b/0x38 [] serial8250_backup_timeout+0x6d/0xe8 [] run_timer_softirq+0x121/0x189 [] __do_softirq+0x6f/0xe2 [] do_softirq+0x61/0xd0 [] 0xffffffff irq event stamp: 332718 hardirqs last enabled at (332717): [] default_idle+0x3e/0x59 hardirqs last disabled at (332718): [] common_interrupt+0x24/0x40 softirqs last enabled at (332708): [] __do_softirq+0xdc/0xe2 softirqs last disabled at (332691): [] do_softirq+0x61/0xd0 other info that might help us debug this: 1 lock held by swapper/0: #0: (&irq_lists[i].lock){+...}, at: [] serial8250_interrupt+0x15/0xe0 stack backtrace: [] show_trace_log_lvl+0x1a/0x2f [] show_trace+0x12/0x14 [] dump_stack+0x16/0x18 [] print_usage_bug+0x141/0x14b [] mark_lock+0xa2/0x419 [] __lock_acquire+0x3b9/0xba9 [] lock_acquire+0x56/0x6f [] _spin_lock+0x2b/0x38 [] serial8250_interrupt+0x4a/0xe0 [] handle_IRQ_event+0x1a/0x46 [] handle_fasteoi_irq+0x7d/0xb6 [] do_IRQ+0xb1/0xd9