""We recently ran across a strange higgs-bugson that manifested itself in a critical system [β¦] A higgs-bugson is a bug that is reported in practice but difficult to reproduce, [β¦]
The Linux kernel does not actually implement this cache as suggested by the RFC, so I wrote a kernel patch to add this functionality and mailed it off upstream. I also learned that the FreeBSD kernel actually already implements this, so this is new-to-Linux but not new-to-NFS.
[β¦]
Both of these patches are now upstream and will be available in Linux 6.16.""
https://blog.janestreet.com/a-higgs-bugson-in-the-linux-kernel/