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[Bug 202022] slow (780KB/s) USB2.0 + VT82xxxx + yenta (cardbus pcmcia)



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Summary: slow (780KB/s) USB2.0 + VT82xxxx + yenta (cardbus pcmcia)


https://bugzilla.redhat.com/show_bug.cgi?id=202022





------- Additional Comments From zaitcev redhat com  2008-04-05 02:02 EST -------
BTW, I'm afraid it's not the device which is at fault. Something is up
with the controller on that CardBus thing. For that, usbmon is not
good enough, it does not show us all the little descriptors that the
controller uses. Knowing what happens to controller schedules requires
special instrumentation (e.g. someone has to write that for this bug).

It's still worth to vary the block size and attach a couple of usbmon
traces to the bug. Maybe something obvious pops up when I see them.

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