linux-kernel - Re: [Regression] rt2800usb - Wifi performance issues and connection drops

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Date:   Sun, 5 Mar 2023 23:05:47 +0100
From:   Alexander Wetzel <alexander@...zel-home.de>
To:     Linux regressions mailing list <regressions@...ts.linux.dev>
Cc:     "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Thomas Mann <rauchwolke@....net>,
        Stanislaw Gruszka <stf_xl@...pl>,
        Helmut Schaa <helmut.schaa@...glemail.com>,
        Johannes Berg <johannes.berg@...el.com>
Subject: Re: [Regression] rt2800usb - Wifi performance issues and connection
 drops

> Quick update from bugzilla:
> 
> ```
> --- Comment #4 from Thomas Mann (rauchwolke@....net) ---
> i bisected and found the commit that introduced the regression:
> 
> # first bad commit: [4444bc2116aecdcde87dce80373540adc8bd478b] wifi:
> mac80211: Proper mark iTXQs for resumption
> ```
> 
> That's a commit from Alexander, applied by Johannes.
> 
> Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
> --
> Everything you wanna know about Linux kernel regression tracking:
> https://linux-regtracking.leemhuis.info/about/#tldr
> If I did something stupid, please tell me, as explained on that page.
> 

I just uploaded a test patch to bugzilla.
Please have a look if that fixes the issue.

If not I would be interested in the output of your iTXQ status.
Enable CONFIG_MAC80211_DEBUGFS and run this command when the connection 
is bad and send/share/upload to bugzilla the resulting debug.out:

k=1; while [ $k -lt 10 ]; do \
cat /sys/kernel/debug/ieee80211/phy?/netdev:*/stations/*/aqm; \
k=$(($k+1)); done >> debug.out

Alexander