Lennert Buytenhek <buytenh@xxxxxxxxxxxxxx> writes: > Hi! Hello, > Since "mac80211: remove master netdev", mac80211 no longer propagates > TX queue full status (ieee80211_stop_queue et al) up. While the > underlying hardware's TX queue is stopped, mac80211 buffers frames > internally (in ieee80211_tx), but there's no upper limit on the number > of frames it will buffer, leading to badness when there is heavy TX > traffic on the wireless interface: We have noticed very strange throughput degration both with wl1251 and wl1271. With 2.6.28 both drivers were able to achieve 10 Mbit/s throughput over TCP, but with 2.6.32 (and almost the same drivers) we get less than 4 Mbit/s. Because we see it both with wl1251 and wl1271, we are starting to suspect that it's a problem in mac80211. We haven't started analysing this yet, but I'm hoping someone from our team to start it soon. I have no idea if our problem is related to the problem Lennert reports or not, but we will definitely try Johannes' patch and see if it helps. -- Kalle Valo -- 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
