Dnotify support

modulename: dnotify.ko

configname: CONFIG_DNOTIFY

Linux Kernel Configuration
└─>File systems
└─>Dnotify support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Dnotify is a directory-based per-fd file change notification system
that uses signals to communicate events to user-space. There exist
superior alternatives, but some applications may still rely on
dnotify.

If unsure, say Y.

source code:
selects
CONFIG_FSNOTIFY