[pbs-devel] [RFC PATCH 0/5] fix #3935: refactor datastore locking to use tmpfs

[Dietmar Maurer]

> - A "hashmap lock file": An in-memory file filled with robust-futex
>   where the group name simply gets hashed to get to a positioin in the
>   file. Hash clashes aren't an issue since all they'd do is cause
>   multiple groups to be guarded by the same lock, which wouldn't
>   technically be wrong.

Just want to note that above approach could lead to unexpected deadlocks with hash clashes, so I guess it is not that simple to get it right...