> Please voice your thoughts,

although might be a little off-topic...
on every opendir(3), we issue fstatfs to see filesystem type.
it hurts the performance considerably on some filesystems.
eg. nfs needs an RPC for it.
because we need only a cheap part of the structure in this case,
i think it's better to have a system call with a flag to specify
which members in the structure is wanted.

YAMAMOTO Takashi