Similar to LU-10443/LU-10136, test 255c is still failing due to lock reclamation during the test, this time on GK testing. Reducing the lock count in the test from 500 to 100 should dramatically reduce the frequency, and is still a good test.
LU-10136 sanity test_255c: Ladvise test11 failed, 255
LU-10443 sanity - test_255c: Ladvise test 13, bad lock count, returned 100, actual 0