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From: Viresh Kumar <viresh.kumar@linaro.org>
To: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Sudeep Holla <sudeep.holla@arm.com>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Linux PM <linux-pm@vger.kernel.org>,
	Linux ACPI <linux-acpi@vger.kernel.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Dmitry Osipenko <digetx@gmail.com>
Subject: Re: [RFT][PATCH 0/3] cpufreq / PM: QoS: Introduce frequency QoS and use it in cpufreq
Date: Fri, 18 Oct 2019 13:57:45 +0530	[thread overview]
Message-ID: <20191018082745.3zr6tc3yqmbydkrw@vireshk-i7> (raw)
In-Reply-To: <CAJZ5v0hpfvy5iELVRWFA3HS8NoAH0=py0cE+fLaUq2hDReCrnQ@mail.gmail.com>

On 18-10-19, 10:24, Rafael J. Wysocki wrote:
> On Fri, Oct 18, 2019 at 7:44 AM Viresh Kumar <viresh.kumar@linaro.org> wrote:
> >
> > On 17-10-19, 18:34, Rafael J. Wysocki wrote:
> > > [BTW, Viresh, it looks like cpufreq_set_policy() should still ensure
> > > that the new min is less than the new max, because the QoS doesn't do
> > > that.]
> >
> > The ->verify() callback does that for us I believe.
> 
> It does in practice AFAICS, but in theory it may assume the right
> ordering between the min and the max and just test the boundaries, may
> it not?

I think cpufreq_verify_within_limits() gets called for sure from
within ->verify() for all platforms and this explicitly checks

        if (policy->min > policy->max)
                policy->min = policy->max;

-- 
viresh

  reply	other threads:[~2019-10-18  8:27 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-16 10:37 Rafael J. Wysocki
2019-10-16 10:41 ` [RFT][PATCH 1/3] PM: QoS: Introduce frequency QoS Rafael J. Wysocki
2019-10-17  9:41   ` Viresh Kumar
2019-10-17 14:16     ` Rafael J. Wysocki
2019-10-18  5:41       ` Viresh Kumar
2019-10-24 19:01   ` Leonard Crestez
2019-10-24 19:34     ` Leonard Crestez
2019-11-17  7:34   ` Doug Smythies
2019-11-17 16:13   ` Doug Smythies
2019-11-19 14:35     ` Doug Smythies
2019-11-19 19:17       ` Rafael J. Wysocki
2019-11-19 22:13         ` Rafael J. Wysocki
2019-11-20  6:55           ` Doug Smythies
2019-11-20  9:08             ` Rafael J. Wysocki
2019-10-16 10:47 ` [RFT][PATCH 2/3] cpufreq: Use per-policy " Rafael J. Wysocki
2019-10-16 18:01   ` Dmitry Osipenko
2019-10-17 21:29     ` Dmitry Osipenko
2019-10-18  9:29       ` Viresh Kumar
2019-10-18 15:31         ` Dmitry Osipenko
2019-10-16 10:47 ` [RFT][PATCH 3/3] PM: QoS: Drop frequency QoS types from device PM QoS Rafael J. Wysocki
2019-10-16 14:23 ` [RFT][PATCH 0/3] cpufreq / PM: QoS: Introduce frequency QoS and use it in cpufreq Sudeep Holla
2019-10-17  9:57   ` Viresh Kumar
2019-10-17  9:59     ` Sudeep Holla
2019-10-17 16:34       ` Rafael J. Wysocki
2019-10-17 16:42         ` Sudeep Holla
2019-10-18  5:44         ` Viresh Kumar
2019-10-18  8:24           ` Rafael J. Wysocki
2019-10-18  8:27             ` Viresh Kumar [this message]
2019-10-18  8:30               ` Rafael J. Wysocki
2019-10-18  9:24                 ` Viresh Kumar
2019-10-18  9:26                   ` Rafael J. Wysocki
2019-10-18  9:28                     ` Viresh Kumar
2019-10-17 17:14   ` Sudeep Holla
2019-10-17  9:46 ` Viresh Kumar

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