linux-kernel - Re: [PATCH 1/3] arm64: defconfig: Enable CONFIG_ENERGY

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190328102206.doqj5fykqlld7jkd@queper01-lin>
Date:   Thu, 28 Mar 2019 10:22:08 +0000
From:   Quentin Perret <quentin.perret@....com>
To:     edubezval@...il.com, rui.zhang@...el.com, javi.merino@...nel.org,
        viresh.kumar@...aro.org, amit.kachhap@...il.com, rjw@...ysocki.net,
        will.deacon@....com, catalin.marinas@....com
Cc:     daniel.lezcano@...aro.org, dietmar.eggemann@....com,
        ionela.voinescu@....com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/3] arm64: defconfig: Enable CONFIG_ENERGY_MODEL

On Thursday 28 Mar 2019 at 10:13:50 (+0000), Quentin Perret wrote:
> The recently introduced Energy Model (EM) framework manages power cost
> tables for the CPUs of the system. Its only user right now is the
> scheduler, in the context of Energy Aware Scheduling (EAS).
> 
> However, the EM framework also offers a generic infrastructure that
> could replace subsystem-specific implementations of the same concepts,
> as this is the case in the thermal framework.
> 
> So, in order to prepare the migration of the thermal subsystem to use
> the EM framework, enable it in the default arm64 defconfig, which is the
> most commonly used architecture for IPA. This will also compile-in all
> of the EAS code, although it won't be enabled by default -- EAS requires
> to use the 'schedutil' CPUFreq governor while arm64 defaults to
> 'performance'.
> 
> Signed-off-by: Quentin Perret <quentin.perret@....com>
> ---
>  arch/arm64/configs/defconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> index 2d9c39033c1a..3c09bdaaefd3 100644
> --- a/arch/arm64/configs/defconfig
> +++ b/arch/arm64/configs/defconfig
> @@ -97,6 +97,7 @@ CONFIG_XEN=y
>  CONFIG_COMPAT=y
>  CONFIG_HIBERNATION=y
>  CONFIG_WQ_POWER_EFFICIENT_DEFAULT=y
> +CONFIG_ENERGY_MODEL=n

Hmm, sorry I turned this to '=n' for testing and forgot to update the
patch. This obviously should be '=y' ...

>  CONFIG_ARM_CPUIDLE=y
>  CONFIG_CPU_FREQ=y
>  CONFIG_CPU_FREQ_STAT=y
> -- 
> 2.21.0
>