Currently plasma stores list-of-clients in ObjectTableEntry, which is used to track which clients are using a given object, this serves for two purposes:
- If an object is in use.
- If the client trying to abort an object is the one who created it.
A problem with list-of-clients approach is that when a client disconnects, we need to walk through all the objects and remove the client pointer from the list for each object.
Instead, we could add a reference count in ObjectTableEntry, and store list-of-object-ids in client structure. This could both goals that the original approach is targeting, while when a client disconnects, it just walk through its object-ids and dereference each ObjectTableEntry, there's no need to walk through all objects.