These kernels have support for the XFS file system from SGI.
kernel-2.4.21-37.EL.XFS.ia32e.rpm
kernel-2.4.21-37.EL.XFS.x86_64.rpm
kernel-smp-2.4.21-37.EL.XFS.x86_64.rpm
These contain additional kernel modules.
kernel-smp-unsupported-2.4.21-37.EL.XFS.x86_64.rpm
kernel-unsupported-2.4.21-37.EL.XFS.ia32e.rpm
kernel-unsupported-2.4.21-37.EL.XFS.x86_64.rpm
You will also need to install the appropriate kernel-module-xfs-2.4.21-37.EL.???
kernel-module-xfs-2.4.21-37.EL.XFS-1.3.3-1.SL.ia32e.rpm
kernel-module-xfs-2.4.21-37.EL.XFS-1.3.3-1.SL.x86_64.rpm
kernel-module-xfs-2.4.21-37.EL.XFSsmp-1.3.3-1.SL.x86_64.rpm
If you install one of the above kernels and you have openafs then you will
need to update to the appropriate one of these.
Will be provided later.