On Thu, Sep 6, 2012 at 4:13 PM, Alexey ORISHKO <alexey.orishko@xxxxxxxxxxxxxx> wrote: >> -----Original Message----- >> From: Oliver Neukum [mailto:oneukum@xxxxxxx] > > >> looking at cdc-ncm it seeems to me that cdc-ncm is forced to play very >> dirty games because usbnet doesn't have a notion about aggregating >> packets for a single transfer. > > Several issues need to be improved: > Tx path: > 1. IP packets must be accumulated in one NTB. Currently it's done via data copy. > Preferred way would be a possibility to have a list of skb-s in resulting frame sent down. Looks the copy is inevitable because the buffer length of each skb in the list is not possible to be max endpoint packet aligned, so one short packet may terminate the current tx urb transfer. Thanks, -- Ming Lei -- 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
