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    SubjectRe: [PATCH 3/9] nvme: change namespaces_mutext to namespaces_rwsem
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    > namespaces_mutext is used to synchronize the operations on ctrl
    > namespaces list. Most of the time, it is a read operation. It is
    > better to change it from mutex to rwsem.
    >
    > On the other hand, the namespaces mutex could introduce circular
    > dependency easily.

    On the other hand of what?

    Also, can you give an example of such?

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