Re: [RFD PATCH 00/10] cpuidle: Predict the next events with the IO latencies

[Peter Zijlstra]

On Wed, Oct 22, 2014 at 03:57:43PM +0200, Daniel Lezcano wrote:
> After discussing at the LPC2014 Dusseldorf, it appears the idea is
> good but the approach is wrong. The latency tracking must be done at
> the device level, per device and not in the task as what is doing this
> patchset.

end_page_writeback()->test_clear_page_writeback()->__bdi_writeout_inc()

Is the IO completion path that has a fair amount of statistics in, maybe
some of that is usable.

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