On Thu, Nov 22, 2018 at 08:37:10AM +1030, Brett Lymn wrote:
> I am pretty sure that NFS on Linux is all userland.

This would be nice, but it is mostly the opposite.

Some parts are indeed in userland, like maintaining the identity contexts
(gssd) or mapping between symbolic and numeric uids (idmapd), but the
actual file operations are in the kernel.

FUSE is not involved.

Regards,
Rune