Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758386AbZDSJg0 (ORCPT ); Sun, 19 Apr 2009 05:36:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753240AbZDSJgQ (ORCPT ); Sun, 19 Apr 2009 05:36:16 -0400 Received: from e28smtp02.in.ibm.com ([59.145.155.2]:58351 "EHLO e28smtp02.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752326AbZDSJgO (ORCPT ); Sun, 19 Apr 2009 05:36:14 -0400 Message-ID: <49EAF08A.2020407@in.ibm.com> Date: Sun, 19 Apr 2009 15:06:10 +0530 From: Sachin Sant User-Agent: Thunderbird 2.0.0.19 (X11/20081216) MIME-Version: 1.0 To: "Rafael J. Wysocki" CC: Linux Kernel Mailing List , Kernel Testers List Subject: Re: [Bug #13068] Lockdep warining in inotify_dev_queue_event References:

In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3300 Lines: 81 Rafael J. Wysocki wrote: > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=13068 > Subject : Lockdep warining in inotify_dev_queue_event > Submitter : Sachin Sant > Date : 2009-04-05 12:37 (12 days old) > References : http://marc.info/?l=linux-kernel&m=123893439229272&w=4 > I can recreate this with latest kernel. Easiest way is to use the LTP mm tests (runltp -f mm ) ================================= [ INFO: inconsistent lock state ] 2.6.30-rc2-git4 #4 --------------------------------- inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-W} usage. kswapd0/334 [HC0[0]:SC0[0]:HE1:SE1] takes: (&inode->inotify_mutex){+.+.?.}, at: [] .inotify_inode_is_dead+0x38/0xc8 {RECLAIM_FS-ON-W} state was registered at: [] .lockdep_trace_alloc+0xc4/0xf4 [] .__kmalloc+0x100/0x274 [] .kernel_event+0xb8/0x154 [] .inotify_dev_queue_event+0x120/0x1cc [] .inotify_inode_queue_event+0xf0/0x160 [] .vfs_create+0x170/0x1dc [] .do_filp_open+0x25c/0x964 [] .do_sys_open+0x80/0x140 [] .SyS_creat+0x18/0x2c [] syscall_exit+0x0/0x40 irq event stamp: 75815 hardirqs last enabled at (75815): [] .__call_rcu+0x128/0x15c hardirqs last disabled at (75814): [] .__call_rcu+0x4c/0x15c softirqs last enabled at (73084): [] .call_do_softirq+0x14/0x24 softirqs last disabled at (73071): [] .call_do_softirq+0x14/0x24 other info that might help us debug this: 2 locks held by kswapd0/334: #0: (shrinker_rwsem){++++..}, at: [] .shrink_slab+0x5c/0x228 #1: (&type->s_umount_key#15){++++..}, at: [] .shrink_dcache_memory+0xfc/0x244 stack backtrace: Call Trace: [c00000004473b440] [c000000000011a54] .show_stack+0x6c/0x16c (unreliable) [c00000004473b4f0] [c0000000000984d8] .print_usage_bug+0x1c0/0x1f4 [c00000004473b5b0] [c00000000009888c] .mark_lock+0x380/0x6e4 [c00000004473b660] [c00000000009a99c] .__lock_acquire+0x7a8/0x17b4 [c00000004473b760] [c00000000009bab0] .lock_acquire+0x108/0x154 [c00000004473b820] [c0000000005a8bac] .mutex_lock_nested+0x88/0x460 [c00000004473b920] [c000000000166cc0] .inotify_inode_is_dead+0x38/0xc8 [c00000004473b9d0] [c0000000001427f4] .dentry_iput+0xa0/0x128 [c00000004473ba60] [c0000000001429f0] .d_kill+0x5c/0xa0 [c00000004473baf0] [c000000000142d38] .__shrink_dcache_sb+0x304/0x3d0 [c00000004473bbd0] [c000000000142f48] .shrink_dcache_memory+0x144/0x244 [c00000004473bcb0] [c0000000000f58c8] .shrink_slab+0x15c/0x228 [c00000004473bd70] [c0000000000f61a4] .kswapd+0x4c0/0x678 [c00000004473bf00] [c000000000088ba4] .kthread+0x80/0xcc [c00000004473bf90] [c00000000002c194] .kernel_thread+0x54/0x70 Thanks -Sachin -- --------------------------------- Sachin Sant IBM Linux Technology Center India Systems and Technology Labs Bangalore, India --------------------------------- -- 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/