Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753537Ab3F0O6i (ORCPT ); Thu, 27 Jun 2013 10:58:38 -0400 Received: from mx1.redhat.com ([209.132.183.28]:30721 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751408Ab3F0O6g (ORCPT ); Thu, 27 Jun 2013 10:58:36 -0400 Date: Thu, 27 Jun 2013 10:58:24 -0400 From: Dave Jones To: Chris Mason Cc: Linux Kernel , linux-btrfs@vger.kernel.org Subject: btrfs triggered lockdep WARN. Message-ID: <20130627145824.GA21540@redhat.com> Mail-Followup-To: Dave Jones , Chris Mason , Linux Kernel , linux-btrfs@vger.kernel.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3138 Lines: 54 Another bug caused by this script. https://github.com/kernelslacker/io-tests/blob/master/setup.sh WARNING: at kernel/lockdep.c:708 __lock_acquire+0x183b/0x1b70() Modules linked in: sctp lec bridge 8021q garp stp mrp fuse dlci tun bnep hidp rfcomm l2tp_ppp l2tp_netlink l2tp_core vmw_vsock_vmci_transport vmw_vmci vsock cmtp kernelcapi nfnetlink ipt_ULOG scsi_transport_iscsi rose phonet rds irda nfc ipx p8023 p8022 netrom af_key can_raw ax25 llc2 af_802154 x25 pppoe caif_socket pppox can_bcm caif ppp_generic slhc crc_ccitt atm appletalk af_rxrpc psnap llc can btrfs kvm_amd kvm snd_hda_codec_realtek snd_hda_intel btusb snd_hda_codec xor bluetooth raid6_pq serio_raw snd_pcm microcode pcspkr libcrc32c zlib_deflate snd_page_alloc snd_timer snd rfkill edac_core soundcore r8169 mii sr_mod cdrom pata_atiixp radeon backlight drm_kms_helper ttm CPU: 3 PID: 2340684 Comm: rm Not tainted 3.10.0-rc7+ #8 Hardware name: Gigabyte Technology Co., Ltd. GA-MA78GM-S2H/GA-MA78GM-S2H, BIOS F12a 04/23/2010 ffffffff819fb83b ffff88010a751aa0 ffffffff816aed7b ffff88010a751ad8 ffffffff810432b0 0000000000000002 ffffffff8253e3d0 ffff88002e1a9810 00017ee5aac67d60 0000000000000000 ffff88010a751ae8 ffffffff8104339a Call Trace: [] dump_stack+0x19/0x1b [] warn_slowpath_common+0x70/0xa0 [] warn_slowpath_null+0x1a/0x20 [] __lock_acquire+0x183b/0x1b70 [] ? delay_tsc+0x90/0xe0 [] lock_acquire+0x93/0x1e0 [] ? btrfs_try_tree_write_lock+0x47/0xc0 [btrfs] [] _raw_write_lock+0x41/0x80 [] ? btrfs_try_tree_write_lock+0x47/0xc0 [btrfs] [] btrfs_try_tree_write_lock+0x47/0xc0 [btrfs] [] btrfs_search_slot+0x80d/0x950 [btrfs] [] btrfs_del_inode_ref+0x76/0x3b0 [btrfs] [] ? release_extent_buffer+0xb9/0xe0 [btrfs] [] ? free_extent_buffer+0x4f/0xa0 [btrfs] [] __btrfs_unlink_inode+0x181/0x390 [btrfs] [] btrfs_unlink_inode+0x27/0x50 [btrfs] [] btrfs_unlink+0x6d/0xc0 [btrfs] [] vfs_unlink+0xa0/0x110 [] do_unlinkat+0x177/0x230 [] ? trace_hardirqs_on_caller+0x115/0x1e0 [] ? trace_hardirqs_on+0xd/0x10 [] ? syscall_trace_enter+0x25/0x290 [] SyS_unlinkat+0x1b/0x40 [] tracesys+0xdd/0xe2 ---[ end trace 9d90045eda25c268 ]--- That WARN is.. 704 /* 705 * Huh! same key, different name? Did someone trample 706 * on some memory? We're most confused. 707 */ 708 WARN_ON_ONCE(class->name != lock->name); Most confusing indeed. Dave -- 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/