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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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