Re: bug: iwlwifi, aggregation, and mac80211's reorder buffer

[Johannes Berg <johannes@sipsolutions.net>]

On Tue, 2011-03-15 at 11:16 -0700, Daniel Halperin wrote:

> There's still something off about the window size: unlike with ath9k,
> the receiver does continually print out warnings about advancing its
> window. There's something very fishy here: for any given aggregation
> session, the part of the sequence number space this happens is always
> the same! Really weird. Here's a log from 3 agg sessions in a row,
> just running simple TCP iperf:
> 
> [341221.679710] New seq exceeds buffering window: 283, 250

Ok thanks for the patch, I'll still reply here though.


> [341398.950019] iwlagn 0000:03:00.0: iwlagn_tx_agg_start on ra =
> 00:16:ea:c3:b3:8e tid = 0
> [341401.790964] New seq exceeds buffering window: 2335, 2304

So the delta is always 31, it seems? Is iwlwifi consistently sending
batches of 32 instead of the advertised 31?

Also -- don't get confused, the tx_agg_start is on its own TX agg
session, but the new seq stuff is on its RX agg session.

johannes