[<0>] wbt_wait+0xa1/0xe0
[<0>] __rq_qos_throttle+0x23/0x30
[<0>] blk_mq_make_request+0x13a/0x6d0
[<0>] generic_make_request+0xf2/0x300
[<0>] submit_bio+0x66/0x160
[<0>] submit_bh_wbc+0x16d/0x190
[<0>] write_all_supers+0x239/0xa90 [btrfs]
[<0>] btrfs_commit_transaction+0x726/0x9a0 [btrfs]
[<0>] prepare_to_relocate+0x103/0x150 [btrfs]
[<0>] relocate_block_group+0x72/0x620 [btrfs]
[<0>] btrfs_relocate_block_group+0x156/0x2d0 [btrfs]
[<0>] btrfs_relocate_chunk+0x31/0xa0 [btrfs]
[<0>] btrfs_balance+0x71a/0xee0 [btrfs]
[<0>] btrfs_ioctl_balance+0x292/0x340 [btrfs]
[<0>] btrfs_ioctl+0x84c/0x3060 [btrfs]
[<0>] do_vfs_ioctl+0x43d/0x6c0
[<0>] ksys_ioctl+0x5e/0x90
[<0>] __x64_sys_ioctl+0x16/0x20
[<0>] do_syscall_64+0x5f/0x1d0
[<0>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
