Comment 2 for bug 1862878

This issue seems to related to the latest change in LTP for this test case
https://github.com/linux-test-project/ltp/commit/c50f05195ac1c6c62749fee360f1cfbba2606407

With this test reverted, the test result will be:
<<<test_start>>>
tag=add_key01 stime=1581483125
cmdline="add_key01"
contacts=""
analysis=exit
<<<test_output>>>
incrementing stop
tst_test.c:1217: INFO: Timeout per run is 0h 05m 00s
add_key01.c:21: PASS: add_key call succeeded

Summary:
passed 1
failed 0
skipped 0
warnings 0
<<<execution_status>>>
initiation_status="ok"
duration=0 termination_type=exited termination_id=0 corefile=no
cutime=0 cstime=0
<<<test_end>>>

dmesg output:

[ 1132.663932] BUG: non-zero pgtables_bytes on freeing mm: 16384
[ 1132.664848] BUG: non-zero pgtables_bytes on freeing mm: 16384
[ 1133.521332] LTP: starting add_key01