> For the record, "usbnet" has done this quite successfully for some
> time now. It was a design goal in fact; at this point only one of the
> framing schemes risks extra TX copies, and none do it on the RX
> path. It'd be a Good Thing if all of the drivers/usb/net/*.c code
> avoided needless copies... ;)
This is what i was thinking about. I will change the original patch
in order to simplify freeing of the skbs on unplug. I'll send the
resulting patch for review.
>
> I expect it'll make more of a difference for highspeed devices than
> fullspeed ones, but it's always good to avoid trashing data caches
> in your host's CPU!
Performance wise this won't be a big win (speaking about these devices),
but this way it's a lot cleaner design and it is definately an
improvement. ;-)
Petko
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