I wrote:
> I wouldn't have any problem with saying that we don't support NFS
> implementations that don't have stable cookies. But so far I haven't
> found any supported platform except FreeBSD that fails the rmtree test
> against my Synology NAS.
To expand on that: I've now found that Linux, macOS, NetBSD, OpenBSD,
and illumos/OpenIndiana[1] pass that test. I don't believe that Windows
does NFS. That means that FreeBSD is the only one of our supported
platforms that fails. I think we should simply document that NFS on
FreeBSD is broken, and await somebody getting annoyed enough to
fix that brokenness.
regards, tom lane
[1] Getting OpenIndiana to work under qemu is not a task for those
easily discouraged.