generic/430 started failing in 4.12-rc3, as of 7c1d1dcc24b3 "nfsd: grant read delegations to clients holding writes". Looks like that reintroduced the problem fixed by 16abd2a0c124 "NFSv4.2: fix client's attribute cache management for copy_file_range": the client needs to invalidate its cache of the destination of a copy even when it holds a delegation. --b.
