From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750923AbWGZQDc (ORCPT ); Wed, 26 Jul 2006 12:03:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750928AbWGZQDc (ORCPT ); Wed, 26 Jul 2006 12:03:32 -0400 Received: from mail.sf-mail.de ([62.27.20.61]:18627 "EHLO mail.sf-mail.de") by vger.kernel.org with ESMTP id S1750900AbWGZQDb (ORCPT ); Wed, 26 Jul 2006 12:03:31 -0400 From: Rolf Eike Beer To: linux-kernel@vger.kernel.org Subject: [BUG?] possible recursive locking detected Date: Wed, 26 Jul 2006 18:05:21 +0200 User-Agent: KMail/1.9.3 MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart3894488.LAxeYVgYFB"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200607261805.26711.eike-kernel@sf-tec.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --nextPart3894488.LAxeYVgYFB Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Hi, I did some memory stress test (allocating and mlock()ing a huge number of=20 pages) from userspace. At the very beginning of that I got that error long= =20 before the system got unresponsible and the oom killer dropped in. Eike =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D [ INFO: possible recursive locking detected ] kded/5304 is trying to acquire lock: (&inode->i_mutex){--..}, at: [] mutex_lock+0x21/0x24 but task is already holding lock: (&inode->i_mutex){--..}, at: [] mutex_lock+0x21/0x24 other info that might help us debug this: 3 locks held by kded/5304: #0: (&inode->i_mutex){--..}, at: [] mutex_lock+0x21/0x24 #1: (shrinker_rwsem){----}, at: [] shrink_slab+0x25/0x136 #2: (&type->s_umount_key#14){----}, at: [] prune_dcache+0xf6/0x= 144 stack backtrace: [] show_trace_log_lvl+0x54/0xfd [] show_trace+0xd/0x10 [] dump_stack+0x17/0x1c [] __lock_acquire+0x753/0x99c [] lock_acquire+0x4a/0x6a [] __mutex_lock_slowpath+0xb0/0x1f4 [] mutex_lock+0x21/0x24 [] ntfs_put_inode+0x3b/0x74 [ntfs] [] iput+0x33/0x6a [] dentry_iput+0x5b/0x73 [] prune_one_dentry+0x56/0x79 [] prune_dcache+0x10a/0x144 [] shrink_dcache_memory+0x19/0x31 [] shrink_slab+0xd0/0x136 [] try_to_free_pages+0x129/0x1d5 [] __alloc_pages+0x18e/0x284 [] read_cache_page+0x59/0x131 [] ext2_get_page+0x1c/0x1ff [] ext2_find_entry+0x72/0x139 [] ext2_inode_by_name+0xe/0x2e [] ext2_lookup+0x1f/0x65 [] do_lookup+0xa0/0x134 [] __link_path_walk+0x7a5/0xbe4 [] link_path_walk+0x50/0xca [] do_path_lookup+0x212/0x25a [] __user_walk_fd+0x2d/0x41 [] vfs_stat_fd+0x19/0x40 [] vfs_stat+0x11/0x13 [] sys_stat64+0x14/0x2a [] sysenter_past_esp+0x56/0x8d --nextPart3894488.LAxeYVgYFB Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) iD8DBQBEx5LGXKSJPmm5/E4RAqMCAKCjI7psvFFsMsAVpwRbK3YXl7k2JQCdFir7 VseeNlL/lLURRr8Llvw6HQg= =eFze -----END PGP SIGNATURE----- --nextPart3894488.LAxeYVgYFB--