9. Persistent Data

Some LKMs are set up to retain information from one load to the next. This is called persistent data. When you remove one of these LKMs with rmmod , rmmod extracts certain values from the LKM's working storage and stores them in a file. When you next insert the LKM with insmod , insmod reads the persistent data from the file and inserts it into the LKM.

See the --persist option on insmod and rmmod .

Persistent data was introduced in November 2000.