On Monday 10 June 2013 17:23:46 Ming Lei wrote:

On Mon, Jun 10, 2013 at 4:43 PM, Oliver Neukum [off-list ref] wrote:

quoted

On Sunday 09 June 2013 23:18:28 Ming Lei wrote:

quoted

2), the biggest change is the situation in which usb_submit_urb() is called
in complete() callback, so the introduced tasklet schedule delay might be a
con, but it shouldn't be a big deal:

        - control/bulk asynchronous transfer isn't sensitive to schedule
          delay

That is debatable.Missing a frame boundary is expensive because the increased
latency then translates into lower throughput.

Suppose so, considered that bulk transfer will do large data block transfer, and
the extra frame or uFrame doesn't matter over the whole transfer time.

That is not true for all use cases. Networking looks vulnerable.

	Regards
		Oliver