It's a subsystem that makes the user able to access a file using sessions. In this way every modification is not visible until the session is close. Many processes can access concurrently a given file. The system provides also some statistical information into the /sys/kernel/session-module directory where the user can:
*See the number of total open sessions
*See the number of sessions per-process and per-file
*See and change the path where the user can open sessions
You can check the documentation at this address Docs
- Federico Alfano