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From: Viresh Kumar <viresh.kumar@linaro.org>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Peter Zijlstra <peterz@infradead.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linux PM <linux-pm@vger.kernel.org>,
	Russell King - ARM Linux <linux@arm.linux.org.uk>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Russell King <rmk+kernel@armlinux.org.uk>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Juri Lelli <juri.lelli@arm.com>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Morten Rasmussen <morten.rasmussen@arm.com>
Subject: Re: [PATCH v2 02/10] cpufreq: provide data for frequency-invariant load-tracking support
Date: Mon, 10 Jul 2017 12:24:43 +0530	[thread overview]
Message-ID: <20170710065443.GG2928@vireshk-i7> (raw)
In-Reply-To: <12829054.TWIodSo4bb@aspire.rjw.lan>

On 08-07-17, 14:09, Rafael J. Wysocki wrote:
> I'm sort of wondering how many is "a lot" really.  For instance, do you really
> want all of the existing ARM platforms to use the new stuff even though
> it may regress things there in principle?

That's a valid question and we must (maybe we already have) have a policy for
such changes. I thought that such changes (which are so closely bound to the
scheduler) must be at least done at the architecture level and not really at
platform level. And so doing it widely (like done in this patch) maybe the right
thing to do.

> Anyway, if everyone agrees that doing it in the core is the way to go (Peter?),
> why don't you introduce a __weak function for setting policy->cur and
> override it from your arch so as to call arch_set_freq_scale() from there?

I agree. I wanted to suggest that earlier but somehow forgot to mention this.

-- 
viresh

  reply	other threads:[~2017-07-10  6:54 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-06  9:49 [PATCH v2 00/10] arm, arm64: frequency- and cpu-invariant accounting support for task scheduler Dietmar Eggemann
2017-07-06  9:49 ` [PATCH v2 01/10] drivers base/arch_topology: free cpumask cpus_to_visit Dietmar Eggemann
2017-07-06 10:22   ` Viresh Kumar
2017-07-06 10:59     ` Juri Lelli
2017-07-06 11:15       ` Viresh Kumar
2017-07-07 15:50         ` Dietmar Eggemann
2017-07-06  9:49 ` [PATCH v2 02/10] cpufreq: provide data for frequency-invariant load-tracking support Dietmar Eggemann
2017-07-06 10:40   ` Viresh Kumar
2017-07-06 22:38     ` Rafael J. Wysocki
2017-07-07 16:01     ` Dietmar Eggemann
2017-07-07 16:18       ` Rafael J. Wysocki
2017-07-07 17:06         ` Dietmar Eggemann
2017-07-08 12:09           ` Rafael J. Wysocki
2017-07-10  6:54             ` Viresh Kumar [this message]
2017-07-10 12:46               ` Rafael J. Wysocki
2017-07-11  6:39                 ` Viresh Kumar
2017-07-11 15:21                   ` Dietmar Eggemann
2017-07-13 12:40                     ` Sudeep Holla
2017-07-13 13:08                       ` Dietmar Eggemann
2017-07-13 14:06                         ` Sudeep Holla
2017-07-10  9:30             ` Peter Zijlstra
2017-07-10  9:42               ` Viresh Kumar
2017-07-10 10:31                 ` Dietmar Eggemann
2017-07-10 12:02             ` Dietmar Eggemann
2017-07-11  6:01               ` Viresh Kumar
2017-07-11 15:06                 ` Dietmar Eggemann
2017-07-11 14:59                   ` Rafael J. Wysocki
2017-07-11 15:12                     ` Dietmar Eggemann
2017-07-12  4:09                   ` Viresh Kumar
2017-07-12  8:31                     ` Peter Zijlstra
2017-07-12  9:27                       ` Viresh Kumar
2017-07-12 11:14                         ` Peter Zijlstra
2017-07-12 23:13                           ` Rafael J. Wysocki
2017-07-13  7:49                             ` Peter Zijlstra
2017-07-13  8:48                             ` Viresh Kumar
2017-07-13 11:15                               ` Peter Zijlstra
2017-07-13 14:04                           ` Sudeep Holla
2017-07-13 14:42                             ` Peter Zijlstra
2017-07-13 15:00                               ` Sudeep Holla
2017-07-13 12:54                         ` Sudeep Holla
2017-07-13 12:49                     ` Sudeep Holla
2017-07-10  6:40       ` Viresh Kumar
2017-07-06  9:49 ` [PATCH v2 03/10] drivers base/arch_topology: " Dietmar Eggemann
2017-07-06 10:45   ` Viresh Kumar
2017-07-07 16:51     ` Dietmar Eggemann
2017-07-06  9:49 ` [PATCH v2 04/10] arm: wire cpufreq input data for frequency-invariant accounting up to the arch Dietmar Eggemann
2017-07-06 10:42   ` Viresh Kumar
2017-07-10 15:13     ` Dietmar Eggemann
2017-07-11  6:32       ` Viresh Kumar
2017-07-06  9:49 ` [PATCH v2 05/10] arm: wire frequency-invariant accounting support up to the task scheduler Dietmar Eggemann
2017-07-06 10:46   ` Viresh Kumar
2017-07-06  9:49 ` [PATCH v2 06/10] arm: wire cpu-invariant " Dietmar Eggemann
2017-07-06 10:47   ` Viresh Kumar
2017-07-06  9:49 ` [PATCH v2 07/10] arm64: wire cpufreq input data for frequency-invariant accounting up to the arch Dietmar Eggemann
2017-07-06 10:48   ` Viresh Kumar
2017-07-06  9:49 ` [PATCH v2 08/10] arm64: wire frequency-invariant accounting support up to the task scheduler Dietmar Eggemann
2017-07-06 10:48   ` Viresh Kumar
2017-07-06  9:49 ` [PATCH v2 09/10] arm64: wire cpu-invariant " Dietmar Eggemann
2017-07-06 10:49   ` Viresh Kumar
2017-07-06  9:49 ` [PATCH v2 10/10] drivers base/arch_topology: inline cpu- and frequency-invariant accounting Dietmar Eggemann
2017-07-06 10:57   ` Viresh Kumar
2017-07-10 15:17     ` Dietmar Eggemann

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