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    SubjectRe: [PATCH] udev enhancements to use kernel event queue
    Greg KH wrote:

    > But you also have to "hold" events for a bit of time in order to
    > determine that things are out of order, or we have a gap. So a bit of
    > "complex" logic is in the works, but it's much less complex than if we
    > didn't have that sequence number.
    >

    OK, so the important point here is that while you probably delay events
    for a small amount of time (1-3 seconds maybe) to ensure that you aren't
    processing steps out of order, it's not likely that userspace is going
    hold event #1321 for an indefinite period of time just because it has
    never seen event #1320.

    I can't wait to see this implementation; it's going to be interesting,
    to say the least. However, without the sequence numbers, it would very
    likely be impossible.

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