2.6-rhel6.series 2.6.32-504.30.3.el6 (RHEL 6.6)
2.6-rhel6.series 2.6.32-573.3.1.el6 (RHEL 6.7)
3.10-rhel7.series 3.10.0-229.7.2.el7 (RHEL 7.1)
-3.0-sles11sp3.series 3.0.101-0.47.52 (SLES11 SP3)
+3.0-sles11sp3.series 3.0.101-0.47.55 (SLES11 SP3)
See lustre/ChangeLog for supported client kernel versions.