Note that Lustre server kernels do not REQUIRE patches to the core kernel code in order to function. However, the server kernel patches may improve performance significantly. Lustre may not work with the latest kernels due to API changes in the kernel. See lustre/ChangeLog for details. In addition to the patches that should be applied to the core kernel, patches are required for a specific kernel in order to build the ldiskfs module from ext4. Those patches are applied automatically during the ldiskfs build process and SHOULD NOT be applied to the kernel directly. Servers running only ZFS OSDs DO NOT need any patches. Clients since 2.6.18 DO NOT need any patches. PATCH SERIES FOR SERVER KERNELS: 2.6-rhel6.series 2.6.32-431.29.2.el6 (RHEL 6.5) 2.6-rhel6.series 2.6.32-504.30.3.el6 (RHEL 6.6) 2.6-rhel6.series 2.6.32-573.18.1.el6 (RHEL 6.7) 3.10-rhel7.series 3.10.0-327.10.1.el7 (RHEL 7.2) 3.0-sles11sp3.series 3.0.101-0.47.71 (SLES11 SP3) 3.0-sles11sp3.series 3.0.101-68 (SLES11 SP4) 3.12-sles12.series 3.12.53-60.30 (SLES12 SP1) See lustre/ChangeLog for supported client kernel versions.