In kernel 2.4 DNOTIFY file system event monitor functionality was introduced. In newer kernels 2.6 this functionality is replaced with newer and better INOTIFY file system change monitoring system. However, obsolete DNOTIFY directory based monitoring system is retained for compatibility reasons in newr kernels.

Could anyone tell me where or when this DNOTIFY is used today? Is this something that possibly could be used or this is now total legacy?