UPDATE
I may have found a fix for this issue.
https://askubuntu.com/questions/176565/why-does-kworker-cpu-usage-get-so-high
I followed the steps in the about link and my CPU usage went to 0-1% at idle as it should. Mine was gpe08.
I'm going to add the fix to the 'GO' file. I'll report back if I see any other issues that come from this fix.
Hi,
I am seeing this issue too, and I've trying to pin down the issue.
I've gone as far as disconnecting all drives, fresh reboot, array stopped, in 'No Plug-In Safe Mode' and the issue is still there.
I'm on 6.8.3