Hi, I hit this BUG today.
I'm running 3.3.1 merged with the ceph and btrfs bits for 3.4, i.e. 3.3.1 + commit bc3f116fec194 "Btrfs: update the checks for mixed block groups with big metadata blocks" commit c666601a935b9 "rbd: move snap_rwsem to the device, rename to header_rwsem" The btrfs filesystem in question is backing a Ceph OSD under a heavy write load. Here's the bug: [510342.517157] ------------[ cut here ]------------ [510342.521855] kernel BUG at fs/btrfs/extent_io.c:3982! [510342.526894] invalid opcode: 0000 [#1] SMP [510342.531102] CPU 4 [510342.533028] Modules linked in: btrfs zlib_deflate ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm ib_addr ipv6 ib_sa iw_cxgb4 dm_mirror dm_region_hash dm_log dm_round_robin dm_multipath scsi_dh vhost_net macvtap macvlan tun kvm uinput sg sd_mod joydev ata_piix libata button microcode mpt2sas scsi_transport_sas raid_class scsi_mod serio_raw pcspkr mlx4_ib ib_mad ib_core mlx4_en mlx4_core cxgb4 i2c_i801 i2c_core iTCO_wdt iTCO_vendor_support ehci_hcd uhci_hcd ioatdma dm_mod i7core_edac edac_core nfs nfs_acl auth_rpcgss fscache lockd sunrpc tg3 bnx2 igb dca e1000 [last unloaded: scsi_wait_scan] [510342.587836] [510342.589412] Pid: 16609, comm: kworker/4:2 Not tainted 3.3.1-00162-gd8b2857 #15 Supermicro X8DTH-i/6/iF/6F/X8DTH [510342.599601] RIP: 0010:[<ffffffffa057924c>] [<ffffffffa057924c>] btrfs_release_extent_buffer_page.clone.0+0x2c/0x130 [btrfs] [510342.610893] RSP: 0018:ffff88015fb6ba10 EFLAGS: 00010202 [510342.616277] RAX: 0000000000000004 RBX: ffff880ab81865a0 RCX: ffff880174bc0230 [510342.623476] RDX: ffff8801335bf9b1 RSI: 00000000000d0fb8 RDI: ffff880ab81865a0 [510342.630675] RBP: ffff88015fb6ba40 R08: 0000000000000038 R09: 0000000000000003 [510342.637874] R10: 0000000000000008 R11: ffff8804658c9e40 R12: ffff88015fb6a000 [510342.645069] R13: ffff880ab81865a0 R14: 000000000000000e R15: ffff88015fb6bc10 [510342.652268] FS: 0000000000000000(0000) GS:ffff880627c80000(0000) knlGS:0000000000000000 [510342.660418] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [510342.666234] CR2: ffffffffff600400 CR3: 0000000001a05000 CR4: 00000000000006e0 [510342.673427] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [510342.680627] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [510342.687827] Process kworker/4:2 (pid: 16609, threadinfo ffff88015fb6a000, task ffff880102ca4410) [510342.696669] Stack: [510342.698769] ffff880100000000 ffff880ab81865a0 ffff88015fb6a000 ffff8806057d2eb0 [510342.706297] 000000000000000e ffff88015fb6bc10 ffff88015fb6ba70 ffffffffa05793f2 [510342.713825] ffff88015fb6bb80 ffff880ab81865a0 ffff88015fb6bb50 0000000000000008 [510342.721362] Call Trace: [510342.723912] [<ffffffffa05793f2>] release_extent_buffer+0xa2/0xe0 [btrfs] [510342.730790] [<ffffffffa05795b4>] free_extent_buffer+0x34/0x80 [btrfs] [510342.737407] [<ffffffffa057a126>] btree_write_cache_pages+0x246/0x410 [btrfs] [510342.744637] [<ffffffffa054e96a>] btree_writepages+0x3a/0x50 [btrfs] [510342.751060] [<ffffffff810fc421>] do_writepages+0x21/0x40 [510342.756537] [<ffffffff810f0b0b>] __filemap_fdatawrite_range+0x5b/0x60 [510342.763136] [<ffffffff810f0de3>] filemap_fdatawrite_range+0x13/0x20 [510342.769568] [<ffffffffa0554ecf>] btrfs_write_marked_extents+0x7f/0xe0 [btrfs] [510342.776867] [<ffffffffa0554f5e>] btrfs_write_and_wait_marked_extents+0x2e/0x60 [btrfs] [510342.784951] [<ffffffffa0554fbb>] btrfs_write_and_wait_transaction+0x2b/0x50 [btrfs] [510342.792768] [<ffffffffa055604c>] btrfs_commit_transaction+0x7ac/0xa10 [btrfs] [510342.800060] [<ffffffff81079540>] ? set_next_entity+0x90/0xa0 [510342.805875] [<ffffffff8105f5d0>] ? wake_up_bit+0x40/0x40 [510342.811365] [<ffffffffa0556590>] ? btrfs_end_transaction+0x20/0x20 [btrfs] [510342.818403] [<ffffffffa05565af>] do_async_commit+0x1f/0x30 [btrfs] [510342.824748] [<ffffffffa0556590>] ? btrfs_end_transaction+0x20/0x20 [btrfs] [510342.831774] [<ffffffff81058680>] process_one_work+0x140/0x490 [510342.837673] [<ffffffff8105a417>] worker_thread+0x187/0x3f0 [510342.843319] [<ffffffff8105a290>] ? manage_workers+0x120/0x120 [510342.849225] [<ffffffff8105f02e>] kthread+0x9e/0xb0 [510342.854176] [<ffffffff81486c64>] kernel_thread_helper+0x4/0x10 [510342.860168] [<ffffffff8147d84a>] ? retint_restore_args+0xe/0xe [510342.866161] [<ffffffff8105ef90>] ? kthread_freezable_should_stop+0x80/0x80 [510342.873198] [<ffffffff81486c60>] ? gs_change+0xb/0xb [510342.878322] Code: 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 08 66 66 66 66 90 8b 47 38 49 89 fd 85 c0 75 0c 48 8b 47 20 4c 8d 7f 20 84 c0 79 04 <0f> 0b eb fe 48 8b 47 20 a8 04 75 f4 48 8b 07 49 89 c4 4c 03 67 [510342.898331] RIP [<ffffffffa057924c>] btrfs_release_extent_buffer_page.clone.0+0x2c/0x130 [btrfs] [510342.907294] RSP <ffff88015fb6ba10> [510342.911241] ---[ end trace 62013c6b6e2e5135 ]--- Please let me know if there is anything I can do to help track this down. Thanks -- Jim -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
