Johannes Berg wrote: > Can you change your quote string from " > " to "> "? Just asking, if you > can't/don't want to that's fine, it just always confuses me for a > second. I really should try to figure out if I can convince my mailer to > highlight " > " indented text as quote too. Sure, adding (setq vm-included-text-prefix "> ") in my .emacs did the trick. :) > > Well, currently ath9k maintains a buffer list for each tid. > > When mac80211 sends down a frame, if the recipient has an aggr. session going, > > it is appended to the tid's buffer list. Non-HT frames are sent out immediately. > > Incidentally, why the distinction between HT and non-HT frames? HT frames for aggregation enabled STAs are processed in the TX completion path, so they are buffered. > > On TX completion, we run through all the ACs, STAs and TIDs and send out pending > > frames as aggregates. > > So basically you can always have one frame or one aggregation > "pack" (for lack of a better word) queued to the hw? > I am not sure, I should check. > > mac80211 can probably help by maintaining the TX state for each TID, maintain the > > buffer list, etc. and provide appropriate mechanisms for drivers to obtain pending > > frames as and when needed. > > Sure could. Intel's hw would probably like a way to say "stop this TID" > and "wake this TID" which is what they tried to do using real queues. > mac80211 could queue up the frames in per-station state and provide a > functions like > > ieee80211_stop_aggr_stream(struct ieee80211_sta *sta, u8 tid); > ieee80211_wake_aggr_stream(struct ieee80211_sta *sta, u8 tid); > > or something like that. Then those frames would flow into the right > queue. We might need a multi-layer start/stop management but we already > do, we've just managed to get away without it without tx stalls. Or they > just haven't been reported yet. > Makes sense, ath9k currently has a similar set of functions ( pausing/resuming TIDs). How would the pending frames for each TID be managed ? Will the driver be able to pull them as and when needed or would mac80211 push them down on checking if the TID is awake ? Sujith -- 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
