timing issue in mounting systemd filesystems

[Giacinto Cifelli <gciofono@xxxxxxxxx>]

Dear community,

I have an issue booting on a RV machine.

The mount targets fail, and (I suppose) as a consequence everything
else fails and the system is not running:

[FAILED] Failed to mount Huge Pages File System.
[FAILED] Failed to mount POSIX Message Queue File System.
[FAILED] Failed to mount Kernel Debug File System.
[FAILED] Failed to mount FUSE Control File System.
[FAILED] Failed to mount Kernel Configuration File System.
[FAILED] Failed to start Rule-based�…r for Device Events and Files.
[FAILED] Failed to start Set Up Additional Binary Formats.
[FAILED] Failed to start Rule-based�…r for Device Events and Files.
[FAILED] Failed to start Rule-based�…r for Device Events and Files.
[FAILED] Failed to start Rule-based�…r for Device Events and Files.
[FAILED] Failed to start Rule-based�…r for Device Events and Files.
[FAILED] Failed to start Rule-based�…r for Device Events and Files.
[FAILED] Failed to start Network Time Synchronization.
[FAILED] Failed to start Network Time Synchronization.
[FAILED] Failed to start Network Time Synchronization.
[FAILED] Failed to start Network Time Synchronization.
[FAILED] Failed to start Network Time Synchronization.
[FAILED] Failed to start Network Time Synchronization.
[FAILED] Failed to start Network Manager.
[FAILED] Failed to start Modem Manager.
[FAILED] Failed to start Network Manager.
[FAILED] Failed to start Remove Sta�…ext4 Metadata Check Snapshots.
[FAILED] Failed to start Switcheroo Control Proxy service.
[FAILED] Failed to start Power Profiles daemon.
[FAILED] Failed to start Load/Save Random Seed.
[FAILED] Failed to start Network Manager.
[FAILED] Failed to start User Login Management.
[FAILED] Failed to start Accounts Service.
[FAILED] Failed to start Network Manager.
[FAILED] Failed to start Power Profiles daemon.
[FAILED] Failed to start Network Manager.
[FAILED] Failed to start User Login Management.
[FAILED] Failed to start Network Manager.
[FAILED] Failed to start Power Profiles daemon.
[FAILED] Failed to start User Login Management.
[FAILED] Failed to start Power Profiles daemon.
[FAILED] Failed to start User Login Management.
[FAILED] Failed to start Power Profiles daemon.
[FAILED] Failed to start User Login Management.
[FAILED] Failed to start User Login Management.
[FAILED] Failed to start Power Profiles daemon.

I have then increased the log level to debug in the kernel cmdline to
have more info:
  systemd.log_level=debug systemd.log_target=console

and with these settings it boots normally (although much slower).

I could live with it, and lower the log level once booted to have a
useable system, but I would like to understand what the problem is and
solve it, as it could be that on a different configuration it would
fail again.
Any hints, please?