[FS#44] Ath9k - TX performance regression on greater coverage settings

[LEDE Bugs]

The following task has a new comment added:

FS#44 - Ath9k - TX performance regression on greater coverage settings
User who did this - Koen Vandeputte (xback)

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The patch will not be accepted as it basically reverts this commit.

The main issue is that TCP does not ramp-up as mac80211 queueing introduces delay on TCP ack which is amplified if coverage distance is increased.

Therefore TCP is stuck at this low rate.

I exchanged some mails with Eric Dumazet, and he points out that mac80211/ath9k should complete TX faster in order to ramp-up TCP speed.


At this point, I lack the detailed knowledge to properly investigate/fix this.

Hopefully later on ..
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=44#comment3619