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    SubjectRe: Notifier chains are unsafe
    On Wed, 26 Oct 2005, Andreas Kleen wrote:

    > > Note that the RCU documentation says RCU critical sections are not
    > > allowed
    > > to sleep.
    >
    > In this case it would be ok.

    I don't understand. If it's okay for an RCU critical section to sleep in
    this case, why wouldn't it be okay always? What's special here?

    Aren't there requirements about critical sections finishing on the same
    CPU as they started on?

    Can you please explain in more detail?

    Alan Stern

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