I haven't looked at code, but if `xhttp_prom_stats` cannot be easily reused, then at least a shorter name for modparam has to be found, `xhttp_prom_pkgmem_stats_enabled` is really long and looking rather odd. Usually private memory is referred simply as `pkg`, not `pkgmem`, also `enabled` should be the state/meaning for the value of parameter, not something useful to be included in the name of the parameter.