I am working on backporting NFS-RDMA to older versions of Linux for the
Open Fabrics Linux kernel stack (OFED).  I have backported NFS-RDMA to
RHEL5.2 (which has a kernel based on 2.6.18), and others are working on
backporting to other older kernels.  The issue that I have and they will
discover is that there is a check in the mount command for kernels
greater than 2.6.22.  If it is older than this version, it will not pass
args to the kernel.

I have come up with a patch to add an additional flag to the mount
command to allow this kernel version check to be over-ruled.  Please
consider adding it to the next release of the nfs-utils.

Thanks,
Jon