Earlier, I mentioned that modern NFSservers don't have a comprehensive list of NFS filesystem accesspermissions stored in the kernel; instead they have a cache andsome sort of upcall mechanism where the kernel will ask mountd if a given client has access to a given filesystem if necessary.I've recently been investigating how Solaris 10 handles this, sohere's what I know of the kernel authorization cache:

First, the Solaris kernel does cache negative entries (this IP addressis not allowed to access this