file system change notifications

[Kim Shrier]

I have a project where I need to notice changes to files in a large directory tree.
I noticed that there was a project in GSOC 2010 to implement such a feature.

https://wiki.freebsd.org/SOC2010IlyaPutsikau 

It appears that it was never completed.  Is it desirable to have this project
completed and added into FreeBSD.  Or, is there another way to get file
system change notifications?

Kim