As mobile and embedded processors get more complex — and more numerous — the interest in improving the power efficiency of the scheduler has increased. While a number of power-related scheduler patchesexist, none seem all that close to merging into the mainline. Getting something upstream always looked like a daunting task; scheduler changes are hard to make in general, these changes come from a constituency that the scheduler maintainers are not used to serving, and the existence of competing patches muddies the water somewhat. But now it seems that the complexity of the situation has increased again, to the point that the merging of any power-efficiency patches may gotten even harder.
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