This "incore" file system driver is a self-contained file system. It does not use any resource external to the node. It is primarily intended for enabling an efficient compute-node bootstrap. It might also be useful for a very small scratch file system, holding device files, and the like. The root directory i-node is manufactured on the fly. The source specification for the mount() call should be something like: ++ Where: are the directory permissions masked by 0777 Note -- no umask is applied. should be the owner's uid should be the owner's gid Most operations are supported, with the notable exception of symbolic links. In the implementation, the driver is really set up to export most useful symbols without polluting the name space or contending with other public symbols. However, the symbols are not yet exported. If we ever require a proc-fs style file system, this could be very useful provided a little extra work is done to allow other drivers to overload some operations. Particularly the file ops, I would think.