How can the reference count in general graph directory be greater than 0 >

1 pointthommyh0 comments

>How can the reference count in general graph directory be greater than 0 even when it's not possible to reference to a directory or a file?

I'm reading the dinosaur book. The answer to this question is due to loops. But how? Can you illustrate it?

https://www.csie.ntu.edu.tw/~d92005/OS%202008/ch11.pdf [![enter image description here][1]][1]

Take this figure for example and try to explain this concept.

  [1]: https://i.stack.imgur.com/YGVde.png