Comment 92 for bug 1124250

in
/sys/module/nfs/parameters/nfs4_disable_idmapping
and
/sys/module/nfsd/parameters/nfs4_disable_idmapping

the default value is Y (which justifies the fact that idmapping seems
disabled between two fedora 18 machines.

However, twiggling with those files did not allow me to accomplish
a fully functional nfs-id-mapping as with a fedora 16 nfs server:

apparently the uids are correctly remapped according to the local
username, but actual access to the files obey to "non-remapped" uid;
a quite weird situation.

I guess I am missing something, or perhaps uid remapping support is
currently broken in nfs 4.1