Re: i.MX6, PREEMPT-RT and interactive cpufreq governor

From: Sebastian Andrzej Siewior
Date: Tue Feb 17 2015 - 03:35:53 EST

* Andrey Smirnov | 2014-06-10 11:52:05 [-0700]:

>Eventually I am hoping to disable any sorts of frequency scaling or
>power management on our system, but I am still curious to know if that
>is a known issue patches for which exist. Does anyone has any leads/suggestions?

You need to breakout of the preempt_disable() region. However having
cpufreq running will have major effect on your latency so this might not
what you want in the long term.

>Thank you,
>Andrey Smirnov

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