Since:

 commit c5a94a618e7ac86b20f53d947f68d7cee6a4c6bc
 Author: Peter Zijlstra <peterz@infradead.org>
 Date:   Wed Aug 23 13:58:44 2017 +0200

     workqueue: Use TASK_IDLE


all worker threads are in D state. They all show up when using "magic
SysRq w". In htop they all have big fat red 'D' in the state column.
Is this really desirable?

I have attached the output of "ps aux" after boot and the SysRq-w
output.

-- 
Markus