[   88.260743] =============================================
[   88.262016] [ INFO: possible recursive locking detected ]
[   88.262669] 2.6.35-rc5-dirty #776
[   88.263298] ---------------------------------------------
[   88.263956] ra/714 is trying to acquire lock:
[   88.264515]  (&(&eb->lock)->rlock){+.+...}, at: [<ffffffffa004b9a4>] btrfs_try_spin_lock+0xa2/0x116 [btrfs]
[   88.264515]
[   88.264515] but task is already holding lock:
[   88.264515]  (&(&eb->lock)->rlock){+.+...}, at: [<ffffffffa004b8f9>] btrfs_clear_lock_blocking+0x20/0x29 [btrfs]
[   88.264515]
[   88.264515] other info that might help us debug this:
[   88.264515] 2 locks held by ra/714:
[   88.264515]  #0:  (&sb->s_type->i_mutex_key#14){+.+.+.}, at: [<ffffffff81137e64>] do_lookup+0xac/0x20c
[   88.264515]  #1:  (&(&eb->lock)->rlock){+.+...}, at: [<ffffffffa004b8f9>] btrfs_clear_lock_blocking+0x20/0x29 [btrfs]
[   88.264515]
[   88.264515] stack backtrace:
[   88.264515] Pid: 714, comm: ra Not tainted 2.6.35-rc5-dirty #776
[   88.264515] Call Trace:
[   88.264515]  [<ffffffff8109afc5>] __lock_acquire+0x153f/0x15d8
[   88.264515]  [<ffffffff81097769>] ? trace_hardirqs_off_caller+0x16/0x99
[   88.264515]  [<ffffffff8106bed9>] ? release_console_sem+0x1b5/0x1e6
[   88.264515]  [<ffffffff8174b3a7>] ? sub_preempt_count+0xe/0xb7
[   88.264515]  [<ffffffff8106c4f2>] ? vprintk+0x37e/0x3c2
[   88.264515]  [<ffffffffa004b9a4>] ? btrfs_try_spin_lock+0xa2/0x116 [btrfs]
[   88.264515]  [<ffffffff8109b1a6>] lock_acquire+0x148/0x18d
[   88.264515]  [<ffffffffa004b9a4>] ? btrfs_try_spin_lock+0xa2/0x116 [btrfs]
[   88.264515]  [<ffffffff81747798>] _raw_spin_lock+0x3b/0x4a
[   88.264515]  [<ffffffffa004b9a4>] ? btrfs_try_spin_lock+0xa2/0x116 [btrfs]
[   88.264515]  [<ffffffffa004b9a4>] btrfs_try_spin_lock+0xa2/0x116 [btrfs]
[   88.264515]  [<ffffffffa000a2f9>] btrfs_search_slot+0x78d/0x921 [btrfs]
[   88.264515]  [<ffffffffa000cd73>] ? __find_space_info+0x0/0xfb [btrfs]
[   88.264515]  [<ffffffffa001a7ff>] btrfs_lookup_inode+0x2f/0x8f [btrfs]
[   88.264515]  [<ffffffffa0028f67>] btrfs_iget+0xc3/0x418 [btrfs]
[   88.264515]  [<ffffffffa002b892>] btrfs_lookup_dentry+0x12f/0x3ff [btrfs]
[   88.264515]  [<ffffffff81141b03>] ? d_alloc+0x181/0x1d4
[   88.264515]  [<ffffffffa002bb78>] btrfs_lookup+0x16/0x2e [btrfs]
[   88.264515]  [<ffffffff81137eb4>] do_lookup+0xfc/0x20c
[   88.264515]  [<ffffffff8113960e>] do_last+0x1a1/0x5c0
[   88.264515]  [<ffffffff8113b6d6>] do_filp_open+0x1d2/0x5ed
[   88.264515]  [<ffffffff8114575f>] ? alloc_fd+0x3b/0x18e
[   88.264515]  [<ffffffff8174b43c>] ? sub_preempt_count+0xa3/0xb7
[   88.264515]  [<ffffffff81748073>] ? _raw_spin_unlock+0x35/0x52
[   88.264515]  [<ffffffff811458a0>] ? alloc_fd+0x17c/0x18e
[   88.264515]  [<ffffffff8112d113>] do_sys_open+0x63/0x116
[   88.264515]  [<ffffffff8112d1f9>] sys_open+0x20/0x22
[   88.264515]  [<ffffffff81031c1b>] system_call_fastpath+0x16/0x1b