003b5d5>] cleaner_kthread+0x95/0x120 [btrfs] [ 606.165626] #1: (&fs_info->cleanup_work_sem){.+.+..}, at: [] btrfs_run_delayed_iputs+0x72/0x130 [btrfs] [ 606.231297] [ 606.231297] stack backtrace: [ 606.287723] Pid: 6669, comm: btrfs-cleaner Not tainted 3.6.0-rc2-ceph-00144-g463b030 #1 [ 606.347823] Call Trace: [ 606.376184] [] print_circular_bug+0x1fb/0x20c [ 606.409243] [] __lock_acquire+0x1ac8/0x1b90 [ 606.441343] [] ? start_transaction+0x124/0x430 [btrfs] [ 606.474583] [] lock_acquire+0xa2/0x140 [ 606.505934] [] ? start_transaction+0x124/0x430 [btrfs] [ 606.539429] [] ? do_raw_spin_unlock+0x5d/0xb0 [ 606.571719] [] __sb_start_write+0xc6/0x1b0 [ 606.603498] [] ? start_transaction+0x124/0x430 [btrfs] [ 606.637405] [] ? start_transaction+0x124/0x430 [btrfs] [ 606.670165] [] ? kmem_cache_alloc+0xb5/0x160 [ 606.702144] [] start_transaction+0x124/0x430 [btrfs] [ 606.735562] [] ? block_rsv_add_bytes+0x56/0x80 [btrfs] [ 606.769861] [] btrfs_start_transaction+0x13/0x20 [btrfs] [ 606.804575] [] btrfs_evict_inode+0x19a/0x330 [btrfs] [ 606.838756] [] ? _raw_spin_unlock+0x2b/0x40 [ 606.872010] [] evict+0xb8/0x1c0 [ 606.903800] [] iput+0x105/0x210 [ 606.935416] [] btrfs_run_delayed_iputs+0xf2/0x130 [btrfs] [ 606.970510] [] ? cleaner_kthread+0x95/0x120 [btrfs] [ 607.005648] [] cleaner_kthread+0xa1/0x120 [btrfs] [ 607.040724] [] ? btrfs_destroy_delayed_refs.isra.102+0x220/0x220 [btrfs] [ 607.104740] [] kthread+0xae/0xc0 [ 607.137119] [] ? trace_hardirqs_on+0xd/0x10 [ 607.169797] [] kernel_thread_helper+0x4/0x10 [ 607.202472] [] ? retint_restore_args+0x13/0x13 [ 607.235884] [] ? flush_kthread_work+0x1a0/0x1a0 [ 607.268731] [] ? gs_change+0x13/0x13 Signed-off-by: Sage Weil ПЁр≥