ReFrame session hangs when filesystem does not support locking

[teojgo]

If the filesystem does not support locking, ReFrame deadlocks when it ries to add the performance results to the database: https://reframe-hpc.readthedocs.io/en/develop/tutorial.html#run-reports-and-performance-logging

[vkarak]

If you disable the DB feature does it still hang? Because I think that locks are now used also for generating the file reports.