Self test for reference tracker

modulename: test_ref_tracker.ko

configname: CONFIG_TEST_REF_TRACKER

Linux Kernel Configuration
└─>Kernel hacking
└─>Kernel Testing and Coverage
└─>Runtime Testing
└─>Self test for reference tracker
In linux kernel since version 5.2 (release Date: 2019-07-07)  
This option provides a kernel module performing tests
using reference tracker infrastructure.

Say N if you are unsure.

source code: