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Date:   Fri, 4 Aug 2023 10:12:19 +0530
From:   Viresh Kumar <viresh.kumar@linaro.org>
To:     David Dai <davidai@google.com>
Cc:     "Rafael J. Wysocki" <rafael@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Sudeep Holla <sudeep.holla@arm.com>,
        Saravana Kannan <saravanak@google.com>,
        Quentin Perret <qperret@google.com>,
        Masami Hiramatsu <mhiramat@google.com>,
        Will Deacon <will@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Marc Zyngier <maz@kernel.org>,
        Oliver Upton <oliver.upton@linux.dev>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>,
        Pavan Kondeti <quic_pkondeti@quicinc.com>,
        Gupta Pankaj <pankaj.gupta@amd.com>,
        Mel Gorman <mgorman@suse.de>, kernel-team@android.com,
        linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 2/2] cpufreq: add virtual-cpufreq driver
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On 03-08-23, 09:50, David Dai wrote:
> > Why do you want to use this and not module_init() ? Then you can
> > simply use `module_platform_driver()`.
> 
> We found that using postcore_init over module_init results in a
> small(2-3%) but measurable benefit during boot time for VMs, so this
> is an optimization that I’d prefer to keep.

Okay. That's what platforms normally do (kick in cpufreq support
earlier), so we can boot at a higher frequency. Just wasn't sure if it
matters for this driver too.

-- 
viresh