Hi, We disabled recording cpufreq stats when fast switching was introduced to the cpufreq core as the cpufreq stats required to take a spinlock and that can't be allowed (for performance reasons) on scheduler's hot path.
Here is an attempt to get rid of the lock and bring back the support. -- Viresh Viresh Kumar (4): cpufreq: stats: Defer stats update to cpufreq_stats_record_transition() cpufreq: stats: Remove locking cpufreq: stats: Enable stats for fast-switch as well cpufreq: Move traces and update to policy->cur to cpufreq core drivers/cpufreq/cpufreq.c | 16 +++++- drivers/cpufreq/cpufreq_stats.c | 87 ++++++++++++++++++++------------ kernel/sched/cpufreq_schedutil.c | 12 +---- 3 files changed, 72 insertions(+), 43 deletions(-) -- 2.25.0.rc1.19.g042ed3e048af