From: Viresh Kumar <viresh.kumar@linaro.org>
To: Ionela Voinescu <ionela.voinescu@arm.com>
Cc: rjw@rjwysocki.net, dietmar.eggemann@arm.com,
catalin.marinas@arm.com, sudeep.holla@arm.com, will@kernel.org,
linux@armlinux.org.uk, mingo@redhat.com, peterz@infradead.org,
linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 4/7] cpufreq: report whether cpufreq supports Frequency Invariance (FI)
Date: Tue, 4 Aug 2020 12:16:56 +0530 [thread overview]
Message-ID: <20200804064656.h25yapthuumdxjw7@vireshk-mac-ubuntu> (raw)
In-Reply-To: <20200803152400.GB20312@arm.com>
On 03-08-20, 16:24, Ionela Voinescu wrote:
> Right, cpufreq_register_driver() should check that at least one of them
> is present
> (although currently cpufreq_register_driver() will return
> -EINVAL if .fast_switch() alone is present - something to be fixed).
I think it is fine as there is no guarantee from cpufreq core if
.fast_switch() will get called and so target/target_index must be
present. We can't do fast-switch today without schedutil (as only that
enables it) and if a notifier gets registered before the driver, then
we are gone again.
> Will do, on both accounts.
>
>
> > > + static_branch_enable_cpuslocked(&cpufreq_set_freq_scale);
> > > + pr_debug("%s: Driver %s can provide frequency invariance.",
> > > + __func__, driver->name);
> >
> > I think a simpler print will work well too.
> >
> > pr_debug("Freq invariance enabled");
> >
>
> I think the right way of reporting this support is important here.
Yeah, we can't say it is enabled as you explained, though I meant
something else here then, i.e. getting rid of driver name and
unimportant stuff. What about this now:
pr_debug("supports frequency invariance");
This shall get printed as this finally:
cpufreq: supports frequency invariance
--
viresh
next prev parent reply other threads:[~2020-08-04 6:47 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-22 9:37 [PATCH v2 0/7] cpufreq: improve frequency invariance support Ionela Voinescu
2020-07-22 9:37 ` [PATCH v2 1/7] cpufreq: move invariance setter calls in cpufreq core Ionela Voinescu
2020-07-27 13:48 ` Rafael J. Wysocki
2020-07-29 9:03 ` Ionela Voinescu
2020-07-30 3:41 ` Viresh Kumar
2020-08-03 13:26 ` Ionela Voinescu
2020-08-03 13:46 ` Rafael J. Wysocki
2020-08-03 14:16 ` Ionela Voinescu
2020-07-22 9:37 ` [PATCH v2 2/7] cpufreq: set invariance scale factor on transition end Ionela Voinescu
2020-07-27 13:52 ` Rafael J. Wysocki
2020-07-29 9:14 ` Ionela Voinescu
2020-07-30 4:13 ` Viresh Kumar
2020-08-03 13:58 ` Ionela Voinescu
2020-08-04 6:26 ` Viresh Kumar
2020-08-05 10:35 ` Ionela Voinescu
2020-07-22 9:37 ` [PATCH v2 3/7] arch_topology: disable frequency invariance for CONFIG_BL_SWITCHER Ionela Voinescu
2020-07-30 4:24 ` Viresh Kumar
2020-07-30 10:29 ` Dietmar Eggemann
2020-07-31 15:48 ` Sudeep Holla
2020-08-03 14:39 ` Ionela Voinescu
2020-08-04 6:30 ` Viresh Kumar
2020-08-10 9:01 ` Ionela Voinescu
2020-07-22 9:37 ` [PATCH v2 4/7] cpufreq: report whether cpufreq supports Frequency Invariance (FI) Ionela Voinescu
2020-07-27 14:02 ` Rafael J. Wysocki
2020-07-29 14:39 ` Ionela Voinescu
2020-07-30 4:43 ` Viresh Kumar
2020-08-03 15:24 ` Ionela Voinescu
2020-08-04 6:46 ` Viresh Kumar [this message]
2020-08-05 10:35 ` Ionela Voinescu
2020-07-22 9:37 ` [PATCH v2 5/7] arch_topology,cpufreq,sched/core: constify arch_* cpumasks Ionela Voinescu
2020-07-30 11:43 ` Catalin Marinas
2020-07-22 9:37 ` [PATCH v2 6/7] arch_topology,arm,arm64: define arch_scale_freq_invariant() Ionela Voinescu
2020-07-30 11:44 ` Catalin Marinas
2020-07-22 9:37 ` [PATCH v2 7/7] cpufreq: make schedutil the default for arm and arm64 Ionela Voinescu
2020-07-30 4:54 ` Viresh Kumar
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