On Wed, Feb 01, 2017 at 10:06:25AM +0100, Jan Kara wrote: > Clearly scheduler code (update_load_avg) calls WARN_ON from scheduler while > holding rq_lock which has been always forbidden. Sergey and Petr were doing > some work to prevent similar deadlocks but I'm not sure how far they > went...
Its not forbidden, just can result in the occasional deadlock, meh. In any case, there's a patch in tip fixing that warn trigger.
