PATCH SERIES FOR SERVER KERNELS:
3.10-rhel7.6.series 3.10.0-957.27.2.el7 (RHEL 7.6)
3.10-rhel7.7.series 3.10.0-1062.18.1.el7 (RHEL 7.7)
-3.10-rhel7.8.series 3.10.0-1127.8.2.el7 (RHEL 7.8)
+3.10-rhel7.8.series 3.10.0-1127.19.1.el7 (RHEL 7.8)
4.18-rhel8.series 4.18.0-80.11.2.el8 (RHEL 8.0)
4.18-rhel8.1.series 4.18.0-147.8.1.el8 (RHEL 8.1)
+4.18-rhel8.2.series 4.18.0-193.6.3.el8 (RHEL 8.2)
See lustre/ChangeLog for supported client kernel versions.