btrfs_orphan_commit_root - dmesg

[  143.921334] device fsid 38cb2041-30f4-4527-a849-364289e0e9fc devid 1 transid 7170 /dev/mapper/vg00-lv_ceph
[  143.932713] btrfs: use lzo compression
[  301.171919] btrfs: unlinked 2 orphans
[  388.031621] btrfs: unlinked 2 orphans
[154940.605459] btrfs: truncated 1 orphans
[154947.442315] btrfs: unlinked 1 orphans
[154964.518402] btrfs: unlinked 1 orphans
[154970.748682] btrfs: unlinked 1 orphans
[154976.672485] btrfs: truncated 1 orphans
[206310.433770] ------------[ cut here ]------------
[206310.439096] WARNING: at fs/btrfs/inode.c:1969 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]()
[206310.448460] Hardware name: ProLiant DL180 G6
[206310.453574] Modules linked in: btrfs zlib_deflate libcrc32c sunrpc bonding ipv6 sg serio_raw pcspkr ghes hed iTCO_wdt iTCO_vendor_support ixgbe dca mdio i7core_edac edac_core iomemory_vsl(P) hpsa squashfs [last unloaded: scsi_wait_scan]
[206310.477729] Pid: 5846, comm: kworker/4:0 Tainted: P            3.0.9-1.fits.1.el6.x86_64 #1
[206310.487136] Call Trace:
[206310.489965]  [<ffffffff8106338f>] warn_slowpath_common+0x7f/0xc0
[206310.496759]  [<ffffffff810633ea>] warn_slowpath_null+0x1a/0x20
[206310.503373]  [<ffffffffa028cbe0>] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]
[206310.511379]  [<ffffffffa02882e5>] commit_fs_roots+0xc5/0x1c0 [btrfs]
[206310.518573]  [<ffffffffa0289236>] btrfs_commit_transaction+0x3c6/0x890 [btrfs]
[206310.526723]  [<ffffffff81086310>] ? wake_up_bit+0x40/0x40
[206310.532851]  [<ffffffffa0289700>] ? btrfs_commit_transaction+0x890/0x890 [btrfs]
[206310.541304]  [<ffffffffa028971f>] do_async_commit+0x1f/0x30 [btrfs]
[206310.548393]  [<ffffffff8107e7b8>] process_one_work+0x128/0x450
[206310.554993]  [<ffffffff810815cb>] worker_thread+0x17b/0x3c0
[206310.561304]  [<ffffffff81081450>] ? manage_workers+0x220/0x220
[206310.567905]  [<ffffffff81085c96>] kthread+0x96/0xa0
[206310.573472]  [<ffffffff81557784>] kernel_thread_helper+0x4/0x10
[206310.580225]  [<ffffffff81085c00>] ? kthread_worker_fn+0x1a0/0x1a0
[206310.587192]  [<ffffffff81557780>] ? gs_change+0x13/0x13
[206310.593186] ---[ end trace 772f030e0ebcd8e3 ]---