linux-kernel - Re: [PATCH V2 0/4] cpufreq: schedutil: move slow path from workqueue to SCHED

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Message-ID: <20161124030102.GA20047@graphite.smuckle.net>
Date:   Wed, 23 Nov 2016 19:01:02 -0800
From:   Steve Muckle <smuckle.linux@...il.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Rafael Wysocki <rjw@...ysocki.net>, linaro-kernel@...ts.linaro.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <Juri.Lelli@....com>,
        Robin Randhawa <robin.randhawa@....com>
Subject: Re: [PATCH V2 0/4] cpufreq: schedutil: move slow path from workqueue
 to SCHED_FIFO task

Hi Viresh,

On Tue, Nov 15, 2016 at 01:53:19PM +0530, Viresh Kumar wrote:
> This work was started by Steve Muckle, where he used a simple kthread
> instead of kthread-worker and that wasn't sufficient as some guarantees
> weren't met.

I know this has already gone in, but can you expand on the unmet
guarantees mentioned here just for my own (and perhaps others')
understanding?

thanks,
Steve