Hi, I managed to break my btrfs root partition in the following way: [ 68.149871] ------------[ cut here ]------------ [ 68.149904] kernel BUG at fs/btrfs/extent-tree.c:5406! [ 68.149918] invalid opcode: 0000 [#1] SMP [ 68.150490] Modules linked in: btrfs zlib_deflate raid6_pq libcrc32c xor nouveau mxm_wmi wmi ast video crc32_pclmul igb crc32c_intel drm_kms_helper dca isci ttm ghash_clmulni_intel usb_storage ptp pps_core libsas i2c_algo_bit drm scsi_transport_sas i2c_core sunrpc [ 68.151744] CPU 9 [ 68.151754] Pid: 427, comm: btrfs-delayed-m Not tainted 3.9.0-0.rc4.git0.1.fc19.x86_64 #1 ASUSTeK COMPUTER INC. Z9PE-D16 Series/Z9PE-D16 Series [ 68.153179] RIP: 0010:[<ffffffffa03e3736>] [<ffffffffa03e3736>] __btrfs_free_extent+0x736/0x840 [btrfs] [ 68.153995] RSP: 0018:ffff880462b47a88 EFLAGS: 00010206 [ 68.154816] RAX: 0000000000000001 RBX: ffff880867e781d8 RCX: ffff880869178000 [ 68.155649] RDX: 000000000000000b RSI: 0000000000000610 RDI: ffff88086ba40ba0 [ 68.156489] RBP: ffff880462b47b48 R08: 0000000000001000 R09: ffff880462b47a40 [ 68.157331] R10: 0000000000000000 R11: 0000000000000000 R12: 000000035c9e1000 [ 68.158174] R13: 000000000000002f R14: 0000000000000610 R15: 000000000000002f [ 68.159021] FS: 0000000000000000(0000) GS:ffff88086f000000(0000) knlGS:0000000000000000 [ 68.159866] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.160710] CR2: 0000000002463ed8 CR3: 0000000001c0c000 CR4: 00000000000407e0 [ 68.161559] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.162420] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 68.163279] Process btrfs-delayed-m (pid: 427, threadinfo ffff880462b46000, task ffff8804636ba6e0) [ 68.164134] Stack: [ 68.164993] 0000000000000000 0000000000000005 0000000000067fe9 0000000000001000 [ 68.165883] ffffe8ff00000000 0000003500000246 0000000000000001 ffff88086ba40ba0 [ 68.166783] ffff880463711148 00000001016ba6e0 ffff880462df4520 ffff88086bbd8000 [ 68.167659] Call Trace: [ 68.168552] [<ffffffffa03e7cf2>] run_clustered_refs+0x3c2/0xc60 [btrfs] [ 68.169445] [<ffffffffa03ecaa0>] btrfs_run_delayed_refs+0xd0/0x530 [btrfs] [ 68.170346] [<ffffffffa03e49cd>] ? btrfs_delayed_refs_qgroup_accounting+0x9d/0xd0 [btrfs] [ 68.171260] [<ffffffffa03fec07>] __btrfs_end_transaction+0xc7/0x310 [btrfs] [ 68.172181] [<ffffffffa03ff5b3>] btrfs_end_transaction_dmeta+0x13/0x20 [btrfs] [ 68.173121] [<ffffffffa044eec0>] btrfs_async_run_delayed_root+0x100/0x1e0 [btrfs] [ 68.174066] [<ffffffffa042c0e0>] worker_loop+0x140/0x580 [btrfs] [ 68.175010] [<ffffffffa042bfa0>] ? btrfs_queue_worker+0x310/0x310 [btrfs] [ 68.175967] [<ffffffff810948fd>] kthread+0xed/0x100 [ 68.176932] [<ffffffff81094810>] ? insert_kthread_work+0x80/0x80 [ 68.177894] [<ffffffff8172726c>] ret_from_fork+0x7c/0xb0 [ 68.178854] [<ffffffff81094810>] ? insert_kthread_work+0x80/0x80 [ 68.179808] Code: 48 8b 33 48 8b 7d 90 e8 39 a8 00 00 44 8b 95 78 ff ff ff e9 c9 fb ff ff 0f 0b 45 89 d0 44 89 55 a0 b9 da 14 00 00 e9 e3 fa ff ff <0f> 0b be 1a 15 00 00 48 c7 c7 2e 24 47 a0 e8 77 57 c8 e0 44 8b [ 68.180884] RIP [<ffffffffa03e3736>] __btrfs_free_extent+0x736/0x840 [btrfs] [ 68.181912] RSP <ffff880462b47a88> Seems to be quite reproducible... I still have the partition, so I can provide further information if necessary. The setup is btrfs mount with -o compress,discard, on LVM with issue_discards=1, on a single SSD. Kernel is: Linux version 3.9.0-0.rc4.git0.1.fc19.x86_64 (mockbuild@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx) (gcc version 4.8.0 20130322 ( Red Hat 4.8.0-1) (GCC) ) #1 SMP Mon Mar 25 02:31:02 UTC 2013 Following the first one, there are further oopsen: [ 68.374221] BUG: sleeping function called from invalid context at kernel/rwsem.c:20 [ 68.374813] in_atomic(): 1, irqs_disabled(): 0, pid: 427, name: btrfs-delayed-m [ 68.375641] INFO: lockdep is turned off. [ 68.376655] Pid: 427, comm: btrfs-delayed-m Tainted: G D 3.9.0-0.rc4.git0.1.fc19.x86_64 #1 [ 68.377693] Call Trace: [ 68.378729] [<ffffffff810a3319>] __might_sleep+0x179/0x230 [ 68.379755] [<ffffffff8171a93a>] down_read+0x2a/0xa0 [ 68.380784] [<ffffffff81083644>] exit_signals+0x24/0x130 [ 68.381809] [<ffffffff8106f51c>] do_exit+0xbc/0xcd0 [ 68.382834] [<ffffffff8106c928>] ? kmsg_dump+0x1b8/0x240 [ 68.383864] [<ffffffff8106c795>] ? kmsg_dump+0x25/0x240 [ 68.384894] [<ffffffff8171f334>] oops_end+0xa4/0xe0 [ 68.385903] [<ffffffff8101db0b>] die+0x4b/0x70 [ 68.386901] [<ffffffff8171ebc0>] do_trap+0x60/0x170 [ 68.387897] [<ffffffff8101aff5>] do_invalid_op+0x95/0xb0 [ 68.388885] [<ffffffffa03e3736>] ? __btrfs_free_extent+0x736/0x840 [btrfs] [ 68.389871] [<ffffffffa0414809>] ? btrfs_get_token_64+0x59/0xe0 [btrfs] [ 68.390842] [<ffffffff81367a2d>] ? trace_hardirqs_off_thunk+0x3a/0x3c [ 68.391809] [<ffffffff8171e423>] ? restore_args+0x30/0x30 [ 68.392774] [<ffffffff817284ee>] invalid_op+0x1e/0x30 [ 68.393745] [<ffffffffa03e3736>] ? __btrfs_free_extent+0x736/0x840 [btrfs] [ 68.394705] [<ffffffffa03e3484>] ? __btrfs_free_extent+0x484/0x840 [btrfs] [ 68.395672] [<ffffffffa03e7cf2>] run_clustered_refs+0x3c2/0xc60 [btrfs] [ 68.396633] [<ffffffffa03ecaa0>] btrfs_run_delayed_refs+0xd0/0x530 [btrfs] [ 68.397592] [<ffffffffa03e49cd>] ? btrfs_delayed_refs_qgroup_accounting+0x9d/0xd0 [btrfs] [ 68.398557] [<ffffffffa03fec07>] __btrfs_end_transaction+0xc7/0x310 [btrfs] [ 68.399523] [<ffffffffa03ff5b3>] btrfs_end_transaction_dmeta+0x13/0x20 [btrfs] [ 68.400512] [<ffffffffa044eec0>] btrfs_async_run_delayed_root+0x100/0x1e0 [btrfs] [ 68.401503] [<ffffffffa042c0e0>] worker_loop+0x140/0x580 [btrfs] [ 68.402428] [<ffffffffa042bfa0>] ? btrfs_queue_worker+0x310/0x310 [btrfs] [ 68.403320] [<ffffffff810948fd>] kthread+0xed/0x100 [ 68.404220] [<ffffffff81094810>] ? insert_kthread_work+0x80/0x80 [ 68.405097] [<ffffffff8172726c>] ret_from_fork+0x7c/0xb0 [ 68.405951] [<ffffffff81094810>] ? insert_kthread_work+0x80/0x80 [ 68.406805] note: btrfs-delayed-m[427] exited with preempt_count 2 Full dmesg is at http://in.waw.pl/~zbyszek/dmesg-root20 . Thanks, Zbyszek -- 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
