[RFC/RFT][PATCH 1/4] cpufreq / sched: SCHED_CPUFREQ_IOWAIT flag to indicate iowait condition

From: Rafael J. Wysocki Testing indicates that it is possible to improve performace significantly without increasing energy consumption too much by teaching cpufreq governors to bump up the CPU performance level if the in_iowait flag is set for the task in

[RFC/RFT][PATCH 1/4] cpufreq / sched: SCHED_CPUFREQ_IOWAIT flag to indicate iowait condition

From: Rafael J. Wysocki Testing indicates that it is possible to improve performace significantly without increasing energy consumption too much by teaching cpufreq governors to bump up the CPU performance level if the in_iowait flag is set for the task in enqueue_task_fair(). For this purpose,