[<0>] submit_bio_wait+0x73/0xb0
[<0>] blkdev_issue_flush+0x3c/0x60
[<0>] __commit_transaction+0x59/0x250 [dm_thin_pool]
[<0>] dm_pool_commit_metadata+0x2d/0x60 [dm_thin_pool]
[<0>] commit+0x32/0x120 [dm_thin_pool]
[<0>] process_deferred_bios+0x29a/0x2c0 [dm_thin_pool]
[<0>] do_worker+0xd0/0x130 [dm_thin_pool]
[<0>] process_one_work+0x196/0x3c0
[<0>] worker_thread+0x281/0x3a0
[<0>] kthread+0x104/0x110
[<0>] ret_from_fork+0x2b/0x50
