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

[Alexander Wetzel]

> > > > @Thomas:
> > > > I've also uploaded you my binary kernel I'm running at the moment
> > > > here: https://www.awhome.eu/s/5FjqMS73rtCtSBM
> > > >
> > > > That kernel should also be able to boot and operate your system.
> > > > Can you try that and tell me, if that makes any difference?
> >
> >   >
> >   > i can't boot the binary kernel here, as the initramfs is included
> >   > in my kernel, if you send me a patch, i can apply it and test it.
> >
> > That was an unpatched kernel. Idea was to verify that it's not a
> > compiler issue. (You seem to be using a hardened Gentoo profile.)
> >
> > Can you share your initrd, so I can include it? (Mail it to me
> > directly, upload it to bug in buguilla or send a link to some cloud
> > storage.)
> I can't share this config, as it's a production system, and i'm not
> allowed to run abitrary binary code on the system. As 6.1.x works
> without a problem, i don't think it's a compiler problem. I will try to
> get a none hardened compiler and recompile the kernel.

I was suspecting something like that. I may try the same in reverse. But 
it's so far quite some way down on the list. There are more promising 
ways to spend the debug time I have for so far.

But one remark:
As far as TX is concerned 6.1 and 6.2 kernels are handling TX in 
drastically different ways for many - including yours - cards.

The patch you identified as culprit is well after the move to the new TX 
mode of operation and only fixes a comparable minor issue.

Your setup seems to require both, the move to iTXQ AND this minor fix.

> > > > I'm also planning to provide some more debug patches, to figuring
> > > > out which part of commit 4444bc2116ae ("wifi: mac80211: Proper
> > > > mark iTXQs for resumption") fixes the issue for you. Assuming my
> > > > understanding above is correct the patch should not really
> > > > fix/break anything for you...With the findings above I would have
> > > > expected your git bisec to identify commit a790cc3a4fad ("wifi:
> > > > mac80211: add wake_tx_queue callback to drivers") as the first
> > > > broken commit...
> > > >
> > > > Alexander