I notice that the transfer buffer for the status URB is also part of struct usb_hub, hence not cacheline-aligned. I also notice that the contents of the buffer are never used; when a status change event occurs the driver probes all the ports and the hub itself.
Would it be safe to eliminate that buffer and have the status IRQ URB request a 0-length transfer? Or would it be better to put that buffer along with the status report buffers in a separate area of memory? Having them all together shouldn't matter, because they would all be written by the same bus master. Alan Stern ------------------------------------------------------- This SF.net email is sponsored by: Etnus, makers of TotalView, The best thread debugger on the planet. Designed with thread debugging features you've never dreamed of, try TotalView 6 free at www.etnus.com. _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
