Recursive locking complaint with nvme-5.13 branch

[Christoph Hellwig]

On Thu, Apr 01, 2021 at 09:09:53AM -0700, Bart Van Assche wrote:
> This call trace was reported during boot. The configuration of the VM that
> reported this call trace is as follows:
> - Boot from a virtio disk.
> - One SATA CD-ROM.
> - One SATA disk.
> - One IDE disk.
> - One SCSI disk.
> - No NVMe controller since virt-manager does not support NVMe controllers as
> far as I know.
> 
> I reported this call trace to the linux-nvme mailing list instead of
> linux-block since I haven't seen this call trace yet with Jens' for-next
> branch.
> 
> Please let me know if you need more information.

We've seen a similar trace a while ago, and back then decided not to
fix it given that it is harmless and pktcdvd was considered to be on the
way out.  But it seems like systemd now tries to set up pktcdvd?