Re: [PATCH v3 1/6] cpufreq: schedutil: reset sg_cpus's flags at IDLE enter

From: Viresh Kumar <viresh.kumar@linaro.org>
To: Patrick Bellasi <patrick.bellasi@arm.com>
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
	Ingo Molnar <mingo@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Morten Rasmussen <morten.rasmussen@arm.com>,
	Juri Lelli <juri.lelli@redhat.com>, Todd Kjos <tkjos@android.com>,
	Joel Fernandes <joelaf@google.com>
Subject: Re: [PATCH v3 1/6] cpufreq: schedutil: reset sg_cpus's flags at IDLE enter
Date: Wed, 13 Dec 2017 14:36:23 +0530	[thread overview]
Message-ID: <20171213090623.GV25177@vireshk-i7> (raw)
In-Reply-To: <20171212151626.GA8264@e110439-lin>

On 12-12-17, 15:16, Patrick Bellasi wrote:
> Since you are already changing some flags position, maybe we can have
> a better organization by using lower flags for "general bits" and
> higher ones for class specific, i.e.
> 
> #define SCHED_CPUFREQ_CLEAR	(1U <<  0)
> #define SCHED_CPUFREQ_IOWAIT	(1U <<  1)
> 
> #define SCHED_CPUFREQ_CFS	(1U <<  8)
> #define SCHED_CPUFREQ_RT	(1U <<  9)
> #define SCHED_CPUFREQ_DL	(1U << 10)

Since we aren't normally going to add any more of class specific ones, I would
like to keep them as 0, 1 and 2. And using the top most bit for CLEAR seems
better to me somehow, just like the signed bit for 32 bit integers.

-- 
viresh