linux-kernel - Re: [PATCH 00/14] Modularize schedutil

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Message-ID: <20200508081128.GM5298@hirez.programming.kicks-ass.net>
Date:   Fri, 8 May 2020 10:11:28 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Quentin Perret <qperret@...gle.com>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, x86@...nel.org,
        hpa@...or.com, sudeep.holla@....com, gregkh@...uxfoundation.org,
        rafael@...nel.org, viresh.kumar@...aro.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        mcgrof@...nel.org, keescook@...omium.org, yzaikin@...gle.com,
        fweisbec@...il.com, tkjos@...gle.com, kernel-team@...roid.com
Subject: Re: [PATCH 00/14] Modularize schedutil

On Thu, May 07, 2020 at 07:09:58PM +0100, Quentin Perret wrote:
> One challenge to implement GKI is to avoid bloating the kernel by
> compiling too many things in, especially given that different devices
> need different things. As such, anything that can be turned into a
> module helps GKI, by offering an alternative to having that component
> built-in. This is true for pretty much anything that can be made
> modular, including drivers as well as other kernel components, such as
> CPUFreq governors.

The idea is to move to 1 governor, schedutil. Also, I abhor all the
exports this thing does. Modules have no business touching most of that.

Look at every EXPORT you do and wonder ask yourself how you can abuse
it. Modules are not a good thing, they're horrible pieces of crap.