Hi, Whilst running a recursive defrag with -czlib (to compress some files copied when I forgot to mount the filesystem with -o compress=zlib), I encountered the BUG below. The btrfs defrag command then hung, as did other attempts to use the filesystem. Shortly afterwards the entire system locked up. I think I have encountered this twice now, but the first time the system locked up whilst I was out and I was unable to check dmesg. This is on linux-3.12-rc3 with up-to-date git btrfs-progs. I'm also using the 'experimental' dedup-syscall git branch of bedup. [ 7815.359821] ------------[ cut here ]------------ [ 7815.361458] WARNING: CPU: 3 PID: 3640 at fs/btrfs/locking.c:46 btrfs_set_lock_blocking_rw+0x6c/0xdc [btrfs]() [ 7815.362981] Modules linked in: parport_pc bnep rfcomm ppdev bluetooth rfkill sp5100_tco i2c_piix4 edac_mce_amd edac_core ehci_pci ohci_pci ohci_hcd ehci_hcd serio_raw k10temp evdev acpi_cpufreq asus_atk0110 processor lp parport loop btrfs crc32c libcrc32c ext4 crc16 jbd2 mbcache raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 raid10 md_mod dm_mod sd_mod sr_mod crc_t10dif crct10dif_common cdrom ata_generic ahci pata_jmicron libahci firewire_ohci xhci_hcd firewire_core libata crc_itu_t scsi_mod usbcore usb_common nouveau mxm_wmi video i2c_algo_bit ttm drm_kms_helper r8169 mii drm i2c_core thermal_sys wmi button [ 7815.368026] CPU: 3 PID: 3640 Comm: btrfs Not tainted 3.12.0-rc3-yadt #1 [ 7815.369613] Hardware name: System manufacturer System Product Name/M4A89GTD-PRO/USB3, BIOS 1703 11/16/2010 [ 7815.371176] 0000000000000000 ffffffff8136c8ad 0000000000000000 ffffffff8103612b [ 7815.372759] ffffffffa03d3820 ffff8801604a71e0 ffff8801604a71e0 0000000000000001 [ 7815.374424] ffff880225766000 ffffffffa03d3820 0000000000000000 ffff8801604a71e0 [ 7815.376026] Call Trace: [ 7815.377665] [<ffffffff8136c8ad>] ? dump_stack+0x41/0x51 [ 7815.379313] [<ffffffff8103612b>] ? warn_slowpath_common+0x74/0x89 [ 7815.380962] [<ffffffffa03d3820>] ? btrfs_set_lock_blocking_rw+0x6c/0xdc [btrfs] [ 7815.382661] [<ffffffffa03d3820>] ? btrfs_set_lock_blocking_rw+0x6c/0xdc [btrfs] [ 7815.384332] [<ffffffffa038dc4c>] ? btrfs_realloc_node+0xd0/0x371 [btrfs] [ 7815.386001] [<ffffffffa038a4e5>] ? btrfs_node_key_to_cpu+0x12/0x30 [btrfs] [ 7815.387677] [<ffffffffa03bb0de>] ? btrfs_defrag_leaves+0x232/0x2e4 [btrfs] [ 7815.389359] [<ffffffffa03aafb6>] ? btrfs_defrag_root+0x54/0xb6 [btrfs] [ 7815.391009] [<ffffffffa03d0c17>] ? btrfs_ioctl_defrag+0x75/0x140 [btrfs] [ 7815.392627] [<ffffffffa03d18fa>] ? btrfs_ioctl+0x822/0x2030 [btrfs] [ 7815.394162] [<ffffffff810c7ff6>] ? get_page+0x9/0x25 [ 7815.395650] [<ffffffff810c802c>] ? __lru_cache_add+0x1a/0x38 [ 7815.397124] [<ffffffff810dc8fb>] ? handle_mm_fault+0x881/0x8a6 [ 7815.398575] [<ffffffff81373559>] ? __do_page_fault+0x348/0x3e8 [ 7815.400053] [<ffffffff8110e542>] ? do_filp_open+0x2b/0x6f [ 7815.401510] [<ffffffff8110f63f>] ? vfs_ioctl+0x1b/0x28 [ 7815.402985] [<ffffffff8110fe0b>] ? do_vfs_ioctl+0x3ab/0x3ee [ 7815.404405] [<ffffffff8110fe9c>] ? SyS_ioctl+0x4e/0x7a [ 7815.405822] [<ffffffff81375622>] ? system_call_fastpath+0x16/0x1b [ 7815.407231] ---[ end trace 66d49a7250b29fb0 ]--- [ 7815.408697] ------------[ cut here ]------------ [ 7815.410077] kernel BUG at fs/btrfs/locking.c:264! [ 7815.411528] invalid opcode: 0000 [#1] SMP [ 7815.412935] Modules linked in: parport_pc bnep rfcomm ppdev bluetooth rfkill sp5100_tco i2c_piix4 edac_mce_amd edac_core ehci_pci ohci_pci ohci_hcd ehci_hcd serio_raw k10temp evdev acpi_cpufreq asus_atk0110 processor lp parport loop btrfs crc32c libcrc32c ext4 crc16 jbd2 mbcache raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid0 multipath linear raid1 raid10 md_mod dm_mod sd_mod sr_mod crc_t10dif crct10dif_common cdrom ata_generic ahci pata_jmicron libahci firewire_ohci xhci_hcd firewire_core libata crc_itu_t scsi_mod usbcore usb_common nouveau mxm_wmi video i2c_algo_bit ttm drm_kms_helper r8169 mii drm i2c_core thermal_sys wmi button [ 7815.417766] CPU: 3 PID: 3640 Comm: btrfs Tainted: G W 3.12.0-rc3-yadt #1 [ 7815.419259] Hardware name: System manufacturer System Product Name/M4A89GTD-PRO/USB3, BIOS 1703 11/16/2010 [ 7815.420845] task: ffff88022565e7b0 ti: ffff880044268000 task.ti: ffff880044268000 [ 7815.422373] RIP: 0010:[<ffffffffa03d371b>] [<ffffffffa03d371b>] btrfs_assert_tree_locked+0x7/0xa [btrfs] [ 7815.424003] RSP: 0018:ffff880044269c08 EFLAGS: 00010246 [ 7815.425580] RAX: 0000000000000000 RBX: ffff8801604a71e0 RCX: 0000000000000007 [ 7815.427161] RDX: 0000000000000006 RSI: 00000000ffffffff RDI: ffff8801604a71e0 [ 7815.428746] RBP: ffff8801604a71e0 R08: 0000000000000000 R09: 0000000000000000 [ 7815.430279] R10: ffff880200000000 R11: 000000000001205c R12: 0000000000000001 [ 7815.431762] R13: ffff880225766000 R14: 0000000000000000 R15: 0000000000000000 [ 7815.433189] FS: 00007f878c9ed780(0000) GS:ffff88022fcc0000(0000) knlGS:0000000000000000 [ 7815.434700] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 7815.436201] CR2: 000000000275d868 CR3: 000000002b9f0000 CR4: 00000000000007e0 [ 7815.437696] Stack: [ 7815.439139] ffffffffa03d3831 0000000000000000 ffff8801604a71e0 0000000000000000 [ 7815.440600] ffffffffa038dc4c 0000000000000002 ffff880044269cff ffffffffa038a4e5 [ 7815.442090] 0000100000000002 010000000000003c 0000000000000000 ffff8801492da5b0 [ 7815.443544] Call Trace: [ 7815.445105] [<ffffffffa03d3831>] ? btrfs_set_lock_blocking_rw+0x7d/0xdc [btrfs] [ 7815.446645] [<ffffffffa038dc4c>] ? btrfs_realloc_node+0xd0/0x371 [btrfs] [ 7815.448177] [<ffffffffa038a4e5>] ? btrfs_node_key_to_cpu+0x12/0x30 [btrfs] [ 7815.449675] [<ffffffffa03bb0de>] ? btrfs_defrag_leaves+0x232/0x2e4 [btrfs] [ 7815.451194] [<ffffffffa03aafb6>] ? btrfs_defrag_root+0x54/0xb6 [btrfs] [ 7815.452743] [<ffffffffa03d0c17>] ? btrfs_ioctl_defrag+0x75/0x140 [btrfs] [ 7815.454292] [<ffffffffa03d18fa>] ? btrfs_ioctl+0x822/0x2030 [btrfs] [ 7815.455784] [<ffffffff810c7ff6>] ? get_page+0x9/0x25 [ 7815.457263] [<ffffffff810c802c>] ? __lru_cache_add+0x1a/0x38 [ 7815.458725] [<ffffffff810dc8fb>] ? handle_mm_fault+0x881/0x8a6 [ 7815.460183] [<ffffffff81373559>] ? __do_page_fault+0x348/0x3e8 [ 7815.461676] [<ffffffff8110e542>] ? do_filp_open+0x2b/0x6f [ 7815.463131] [<ffffffff8110f63f>] ? vfs_ioctl+0x1b/0x28 [ 7815.464610] [<ffffffff8110fe0b>] ? do_vfs_ioctl+0x3ab/0x3ee [ 7815.466023] [<ffffffff8110fe9c>] ? SyS_ioctl+0x4e/0x7a [ 7815.467450] [<ffffffff81375622>] ? system_call_fastpath+0x16/0x1b [ 7815.468867] Code: fa ff ff 65 48 8b 04 25 80 b9 00 00 8b 80 2c 02 00 00 89 43 50 48 83 c4 30 5b 5d 41 5c 41 5d 41 5e 41 5f c3 8b 47 54 85 c0 75 02 <0f> 0b c3 55 53 8b 6f 5c 48 89 fb 83 fd 01 7e 02 0f 0b e8 e2 ff [ 7815.470615] RIP [<ffffffffa03d371b>] btrfs_assert_tree_locked+0x7/0xa [btrfs] [ 7815.472213] RSP <ffff880044269c08> [ 7815.479107] ---[ end trace 66d49a7250b29fb1 ]--- -- David Taylor -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
