Mitchell -
I don't know of any way to kill a 7-Mode process.
There are a number of 'stop' APIs for some specific operations.
The 'snapdiff' API has been a problem in the past.
It takes some time to execute with high file count, given that it has to walk the file system and look at time stamps on the files.
There used to be a race condition where it would chew up too many memory buffers.
You can search for the BURTs using the bug report tool.
We discuss these issues in our SnapProtect ILT course.
I would implement snapdiff API calls with care.
I hope this response has been helpful to you.
At your service,
Eugene E. Kashpureff, Sr.
Independent NetApp Consultant http://www.linkedin.com/in/eugenekashpureff
Senior NetApp Instructor, IT Learning Solutions http://sg.itls.asia/netapp
(P.S. I appreciate 'kudos' on any helpful posts.)