Chuck Lever writes via Kernel.org Bugzilla: The trace captures I've reviewed suggest that a callback session is in use, so I would say the NFS minor version is 1 or higher. Perhaps it's not the RPC_SIGNALLED test above that is the problem, but the one later in nfsd4_cb_sequence_done(). View: https://bugzilla.kernel.org/show_bug.cgi?id=219710#c7 You can reply to this message to join the discussion. -- Deet-doot-dot, I am a bot. Kernel.org Bugzilla (bugspray 0.1-dev)