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

Sebastian
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/