Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751752AbZJWJhc (ORCPT ); Fri, 23 Oct 2009 05:37:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751448AbZJWJhb (ORCPT ); Fri, 23 Oct 2009 05:37:31 -0400 Received: from chipmunk.wormnet.eu ([195.195.131.226]:47558 "EHLO chipmunk.wormnet.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751670AbZJWJha (ORCPT ); Fri, 23 Oct 2009 05:37:30 -0400 X-Greylist: delayed 396 seconds by postgrey-1.27 at vger.kernel.org; Fri, 23 Oct 2009 05:37:29 EDT Date: Fri, 23 Oct 2009 10:30:56 +0100 From: Alexander Clouter To: linux-kernel@vger.kernel.org Subject: kernel BUG at fs/dcache.c:670 +lvm +md +ext3 (snapshots) Message-ID: <20091023093056.GW6085@chipmunk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Organization: diGriz X-URL: http://www.digriz.org.uk/ X-JabberID: alex@digriz.org.uk User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5140 Lines: 94 Hi, Whilst running a 'fun and wild' USB key based RAID1 with LVM I got hit with an BUG when making a snapshot of an ext3 based LV with: /sbin/lvcreate -n SNAP-06_student-db -s -l 256 -p r /dev/lvm-northdown/student-db The spiel below is what I got hit by, if any more information is needed then let me know. As you can seen it's 2.6.32-rc5 I'm running with a merge of the Marvell Orion git tree[1] on top of that....nothing too fancy. The OS is Debian 'lenny' stable for armel and the board is an OpenRD Client. Cheers [1] http://git.marvell.com/?p=orion.git;a=summary BUG: Dentry cdb2f100{i=2,n=/} still in use (1) [unmount of ext3 dm-1] kernel BUG at fs/dcache.c:670! Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = df378000 [00000000] *pgd=1f27c031, *pte=00000000, *ppte=00000000 Internal error: Oops: 817 [#1] last sysfs file: /sys/devices/virtual/block/dm-5/removable CPU: 0 Not tainted (2.6.32-rc5-00014-gdd0f698 #13) PC is at __bug+0x20/0x2c LR is at release_console_sem+0x1a4/0x208 pc : [] lr : [] psr: 60000013 sp : c2ed7d78 ip : c2ed7cb8 fp : c2ed7d84 r10: 00200200 r9 : 00100100 r8 : c04590fc r7 : df51eeb8 r6 : 00000006 r5 : cdb2f100 r4 : cdb2f100 r3 : 00000000 r2 : c04540d4 r1 : 00005669 r0 : 00000025 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 0005317f Table: 1f378000 DAC: 00000015 Process lvcreate (pid: 6994, stack limit = 0xc2ed6270) Stack: (0xc2ed7d78 to 0xc2ed8000) 7d60: c2ed7dc4 c2ed7d88 7d80: c0098d18 c002d3b0 00000001 c0406936 dfa94f54 c2d36348 00000003 dfa94e00 7da0: c03867c8 df421860 df4218bc d40bda0c c2ed6000 c0271f10 c2ed7ddc c2ed7dc8 7dc0: c0098e7c c0098b74 c2ed7e04 dfa94e00 c2ed7df4 c2ed7de0 c008a7dc c0098e2c 7de0: df421860 00000001 c2ed7e0c c2ed7df8 c008a8e8 c008a7c8 dfa94e00 c04597f0 7e00: c2ed7e24 c2ed7e10 c008a9b8 c008a8d8 dfa94e00 df421860 c2ed7e44 c2ed7e28 7e20: c00afa60 c008a988 d40bda00 d40bda00 df030480 00000000 c2ed7e5c c2ed7e48 7e40: c026c220 c00af998 c004c19c 00000000 c2ed7e84 c2ed7e60 c026d1a0 c026c204 7e60: d40bda00 00000000 d40bda00 e2fc5000 df030480 c138fd06 c2ed7ea4 c2ed7e88 7e80: c0272074 c026d0f4 00000000 00000006 c2ed6000 000bfd78 c2ed7eec c2ed7ea8 7ea0: c0272ab4 c0271f20 0000000d 00000000 00000000 000004cc 00000004 0000000f 7ec0: 00000000 e2fc5000 dfb4b980 c138fd06 000bfd78 dfb4b980 000bfd78 00000046 7ee0: c2ed7f0c c2ed7ef0 c00948e4 c02728a0 4adeecb6 00000003 dfb4b980 00000003 7f00: c2ed7f7c c2ed7f10 c009500c c00948bc c0036180 c01a36e0 df890bd0 c0453b58 7f20: c992e8d0 007d1a9f 00000000 c992e8a0 c2ed7f54 c2ed7f40 c003629c c00360b0 7f40: 00048ecb 00000000 c2ed7fac c2ed7f58 c037fd4c 00000003 000bfd78 c138fd06 7f60: dfb4b980 c002a0a4 c2ed6000 00000046 c2ed7fa4 c2ed7f80 c00950b4 c0094b20 7f80: 00001000 00000000 0004fa9c 40038220 0000004e 00000036 00000000 c2ed7fa8 7fa0: c0029f20 c0095084 0004fa9c 40038220 00000003 c138fd06 000bfd78 00001258 7fc0: 0004fa9c 40038220 0000004e 00000036 000c8888 000bfd78 00000046 000000fd 7fe0: 40042580 bef5e338 40036470 40156fbc 20000010 00000003 00000000 00000000 Backtrace: [] (__bug+0x0/0x2c) from [] (shrink_dcache_for_umount_subtree+0x1b4/0x2b8) [] (shrink_dcache_for_umount_subtree+0x0/0x2b8) from [] (shrink_dcache_for_umount+0x60/0x78) [] (shrink_dcache_for_umount+0x0/0x78) from [] (generic_shutdown_super+0x24/0x110) r4:dfa94e00 [] (generic_shutdown_super+0x0/0x110) from [] (kill_block_super+0x20/0x38) r5:00000001 r4:df421860 [] (kill_block_super+0x0/0x38) from [] (deactivate_locked_super+0x40/0x64) r5:c04597f0 r4:dfa94e00 [] (deactivate_locked_super+0x0/0x64) from [] (thaw_bdev+0xd8/0xf8) r5:df421860 r4:dfa94e00 [] (thaw_bdev+0x0/0xf8) from [] (unlock_fs+0x2c/0x54) r7:00000000 r6:df030480 r5:d40bda00 r4:d40bda00 [] (unlock_fs+0x0/0x54) from [] (dm_resume+0xbc/0x100) r4:00000000 [] (dm_resume+0x0/0x100) from [] (dev_suspend+0x164/0x1a4) r8:c138fd06 r7:df030480 r6:e2fc5000 r5:d40bda00 r4:00000000 [] (dev_suspend+0x0/0x1a4) from [] (dm_ctl_ioctl+0x224/0x2a4) r7:000bfd78 r6:c2ed6000 r5:00000006 r4:00000000 [] (dm_ctl_ioctl+0x0/0x2a4) from [] (vfs_ioctl+0x38/0x7c) [] (vfs_ioctl+0x0/0x7c) from [] (do_vfs_ioctl+0x4fc/0x564) r6:00000003 r5:dfb4b980 r4:00000003 [] (do_vfs_ioctl+0x0/0x564) from [] (sys_ioctl+0x40/0x64) [] (sys_ioctl+0x0/0x64) from [] (ret_fast_syscall+0x0/0x28) r7:00000036 r6:0000004e r5:40038220 r4:0004fa9c Code: e1a01000 e59f000c eb0d48e2 e3a03000 (e5833000) ---[ end trace aea992f03fbb0ee3 ]--- -- Alexander Clouter .sigmonster says: Give your child mental blocks for Christmas. -- 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/