I would go back to your previous link:
https://askubuntu.com/questions/33640/kworker-what-is-it-and-why-is-it-hogging-so-much-cpu
There was a good set of instructions there, that should be relatively simple
to carry out:
"If you find the system unusable due to excessive kworker activity, I would
recommend trying to do fewer things. If you think you're not doing anything,
try shutting down long-running services or timers (RSS readers, mail readers,
file indexers, activity trackers, etc.). If this doesn't work, try
restarting. If your system allows you to enable or disable hardware in a
pre-boot environment, try turning off hardware you aren't using. If it
happens on every restart before you do anything, you could try uninstalling
things, but at this point you'll want to be running syscall profiling tools
to track down specific applications that seem to be causing this overload."
Check your system. Are you running any email programs, RSS news readers, any
programs like "recoll" that index files and keywords? (Run the "ps -A"
command and look for "recoll" or "recollindex"). Any "activity tracking"
programs?
Is there any hardware you can disable without harming the functioning of the
way you use your system?
