I am very interested in setting up fq_pie queue discipline for TCP congestion control. If I write net.core.default_qdisc = fq_pie to /etc/sysctl.d/90-override.conf, it should enable fq_pie on latest kernels.

It does work on my desktop though. But on my laptop:

$ tc qdisc show
qdisc noqueue 0: dev lo root refcnt 2 
qdisc noqueue 0: dev wlp1s0 root refcnt 2 
qdisc mq 0: dev wlp0s20f0u3 root 
qdisc fq_pie 0: dev wlp0s20f0u3 parent :4 limit 10240p flows 1024 target 15ms tupdate 16ms alpha 2 beta 20 quantum 1514b memory_limit 32Mb ecn_prob 10 
qdisc fq_pie 0: dev wlp0s20f0u3 parent :3 limit 10240p flows 1024 target 15ms tupdate 16ms alpha 2 beta 20 quantum 1514b memory_limit 32Mb ecn_prob 10 
qdisc fq_pie 0: dev wlp0s20f0u3 parent :2 limit 10240p flows 1024 target 15ms tupdate 16ms alpha 2 beta 20 quantum 1514b memory_limit 32Mb ecn_prob 10 
qdisc fq_pie 0: dev wlp0s20f0u3 parent :1 limit 10240p flows 1024 target 15ms tupdate 16ms alpha 2 beta 20 quantum 1514b memory_limit 32Mb ecn_prob 10

As it can be seen that I have 2 wifi adapters. One comes inbuilt to my laptop, which is Qualcomm Atheros (ath10k), fq_pie can't be activated on this.

The fq_pie however, can be activated on TP Link (RTL8188EUS) adapter.

I have also tried 2 more laptops (Dell and HP), the integrated wifi adapter is not actually running fq_pie.

Is there a way to forcefully activate fq_pie to the Qualcomm Atheros and other wifi adapters?