Arch Linux

This was discussed before on the ML, and changed back and forth a couple of times. I have now looked into it a bit more, and would like to propose the change again.

I guess the arguments in favor are known (saves power, avoids overheating, recommended by the kernel guys, everyone else does it).

The concerns were that this is sub-optimal in some edge-cases. After looking into it again it seems not to be a problem:

* The performance problems seen in some cases have apparently been sorted out long ago.

* If you don't specifically load a driver (such as acpi-cpufreq), then you will stay at 'performance'.

* If you do load a driver, this must be because you want to change away from 'performance', so defaulting to 'performance' makes no sense. However, in the case that your driver does not support 'ondemand', it will fall back to 'performance' and work as before.

If, some time in the future, we auto-load cpufreq drivers, then I still think defaulting to 'ondemand' is correct, as only in the case of kernel bugs would you want to use something else (I can not imagine the p4 driver ever being auto-loaded considering the warnings in the kernel).