On 22 March 2016 at 02:35, David Lang <david@xxxxxxx> wrote: > On Wed, 16 Mar 2016, Michal Kazior wrote: > >> Since 11n aggregation become important to get the >> best out of txops. However aggregation inherently >> requires buffering and queuing. Once variable >> medium conditions to different associated stations >> is considered it became apparent that bufferbloat >> can't be simply fought with qdiscs for wireless >> drivers. > > If the network is quiet enough, don't do any buffering, but in almost all > situations you are going to need to buffer starting no later than the second > packet you try to send. > > Don't try to make queueing occur, just deal with the queues that form > naturally because you can't transmit data any faster (and work to keep them > under some semblence of control) [...] This is what already happens. Queues typically start to build up when hardware tx fifos/queues become busy so by the time they become available you might have a bunch of frames you can aggregate. The patch is more about getting rid of qdiscs because it's inherently hard to teach them how 802.11 aggregation works (per-station per-tid) and the ever-changing nature of per-station tx conditions. I'll update the commit log to better reflect what is being done. Michał -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
