Recently I started to get the following problems with linux-next: - When working via Putty/SSH on the system the console frequently freezes for few seconds. Sometimes only opening a second console makes the first one react again.
- I get "INFO: rcu_sched detected stalls on CPUs/tasks:" warnings as described in [1]. Bisecting the issue resulted in: 31e77c93e432dec79c7d90b888bbfc3652592741 is the first bad commit commit 31e77c93e432dec79c7d90b888bbfc3652592741 Author: Vincent Guittot <vincent.guit...@linaro.org> Date: Wed Feb 14 16:26:46 2018 +0100 sched/fair: Update blocked load when newly idle When NEWLY_IDLE load balance is not triggered, we might need to update the blocked load anyway. We can kick an ilb so an idle CPU will take care of updating blocked load or we can try to update them locally before entering idle. In the latter case, we reuse part of the nohz_idle_balance. After reversing this commit at least the issue with the freezing console is gone. The second one appeared only sporadically, I still have to see whether it pops up again. System is a Zotac CI321 mini PC with Intel Celeron 2961Y CPU. If you need more details, please let me know. Regards, Heiner [1] https://lkml.org/lkml/2018/3/22/605