Hi, all:

I am reading the implementation of shared-subtree in linux kernel. There are two limits about move operation confused me badly, I have read the design document -- Shared-Subtree Concept, Implementation, and

Applications in Linux ,but still puzzled.

1.Why can't move a mount residing in a shared mounts?

2.Why can't move a mount tree containing an unbindable mount to a shared mount?Is it not a good way to prune out unbindable mounts just like rbind semantics do?

Thanks in advance

Rock Lee

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