On Fri, Jun 17, 2016 at 06:16:51AM -0700, Paul E. McKenney wrote: > > Paul, Peter, any ideas about what may be going on here? > > Looks to me like this commit moved some code from synchronize_rcu() to > synchronize_sched(). Assuming that this is a CONFIG_PREEMPT=y system, > might there have been a decrease in the wakeups from the rcu_preempt > kthread?
The 'funny' thing is though; those synchronize thingies are only reached when we change cpufreq policy, so things like: for i in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor ; do echo performance > $i ; done Something which is hardly possible when idle. Weird.
