Al Viro, the lead developer and maintainer of the linux VFS, proposed an RFC for shared subtrees in the VFS. The intent behind the shared subtrees is to propogate events, like mounting of a filesystem, across parts of mount trees. For instance, if mount A and B are bind mounts, any mount carried under A will be visible under B as well.

In an effort to understand the RFC, one of the developers, put out an explaination for the RFC alongwith the scenarios under consideration.

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