linux-kernel - Re: [PATCH] sched/core: Disable CONFIG_SCHED

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Message-ID: <CAHk-=wjNP8Oi4nve=uu=Q3+rGar3CY9fBUQFuJK-WYCK3F198w@mail.gmail.com>
Date:   Mon, 28 Jun 2021 13:10:02 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] sched/core: Disable CONFIG_SCHED_CORE by default

On Mon, Jun 28, 2021 at 12:57 PM Ingo Molnar <mingo@...nel.org> wrote:
>
> You are completely right, I missed this. Find below the patch to fix it -

I think you should update the helptext too, which currently says that
it's enabled if SCHED_SMT is enabled.

And yes, it may be that there is no measurable performance downside,
but this feature has been discussed and under development for a long
time now, and I'd like the default to try to limit the impact since it
makes little sense to most people.

          Linus