Here are 3 patches that I've tested out on my system with only a small number of devices, but it seems to work, so why not let others try it out... These patches make the USB to serial core have the ability to support up to 3000 devices at once now. We do this in the following steps: - adding the minor number to the usb_serial_port structure - removing the static array of ports, and use idr instead - increasing the number Now, if you pay attention, we end up taking up more runtime memory than before, because we are asking the tty layer to reserve a bunch more tty devices for us, negating the potential savings of getting rid of our original static array. I'll work on fixing up the tty layer calls to properly allocate the tty devices only when we need them, much like the pty layer does. When that's done, we can bump the number of usb to serial devices up to 16k with no memory problems. This series is based on my usb-linus branch on my usb.git tree on git.kernel.org, as I needed some of the usb-serial fixes that are in that branch already. Testing / review is most welcome. thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html