iwconfig wlan1 power off
might save dozens of
dmesg logs per second.
man iwconfig it disables power management.
I have some of the ubiquitous USB Wifi sticks with a chipset using the Ralink rt2800 driver. I noticed that while it works fine, I got a lot of dmesg errors like:
rt2800usb_txdone: Warning - Got TX status for an empty queue 2, dropping rt2800usb_entry_txstatus_timeout: Warning - TX status timeout for entry 14 in queue 2