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From: Viresh Kumar <viresh.kumar@linaro.org>
Date: Sat, 12 Nov 2016 10:52:35 +0530
Message-ID: <CAKohponr4=8Bf9C1=_YEhsvDXm0t2vXyGOnrrEr6HaMKzVOcnQ@mail.gmail.com>
Subject: Re: [PATCH 2/3] cpufreq: schedutil: move slow path from workqueue to
 SCHED_FIFO task
To: Peter Zijlstra <peterz@infradead.org>
Cc: Tommaso Cucinotta <tommaso.cucinotta@sssup.it>,
        Rafael Wysocki <rjw@rjwysocki.net>, Ingo Molnar <mingo@redhat.com>,
        Lists linaro-kernel <linaro-kernel@lists.linaro.org>,
        "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Juri Lelli <Juri.Lelli@arm.com>,
        Robin Randhawa <robin.randhawa@arm.com>,
        Steve Muckle <smuckle.linux@gmail.com>
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On 11 November 2016 at 20:09, Peter Zijlstra <peterz@infradead.org> wrote:
> On Fri, Nov 11, 2016 at 03:32:04PM +0100, Tommaso Cucinotta wrote:
>> >+    struct sched_param param = { .sched_priority = 50 };
>>
>> won't you have a tunable here? (sysctl?)
>
> You can use the regular userspace tools, like schedtool and chrt to set
> priorities.

I wanted to get some help from you on this Peter. The out of tree Interactive
governor has always used MAX_RT_PRIORITY - 1 here instead of 50.

But Steve started with 50. What do you think should the value be ?

--
viresh