[Bug 100771] When activating ignore_nice_load with governor ondemand performance drops for normal processes.

https://bugzilla.kernel.org/show_bug.cgi?id=100771

--- Comment #3 from Chen Yu <[email protected]> ---
This is a normal behavior IMO. 

1. task_b with nice = 1 does not mean task_a will always occupy the time slice,
it is CFS scheduler, which means even task with nice = 19 will get chance to
run.
2.When you enable ignore_nice_load, the task_b with nice = 1 will be considered
to be idle, which means that, the total time task_b is running, will be added
to current cpu's idle time, which will cause the cpufreq governor to treat the
cpu load lower than when ignore_nice_load disabled.

Yu

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