linux-kernel - Re: [PATCH v2 13/35] sched: allow runtime config for PREEMPT

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Date: Tue, 28 May 2024 18:27:25 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Ankur Arora <ankur.a.arora@...cle.com>
Cc: linux-kernel@...r.kernel.org, tglx@...utronix.de,
	torvalds@...ux-foundation.org, paulmck@...nel.org,
	rostedt@...dmis.org, mark.rutland@....com, juri.lelli@...hat.com,
	joel@...lfernandes.org, raghavendra.kt@....com,
	sshegde@...ux.ibm.com, boris.ostrovsky@...cle.com,
	konrad.wilk@...cle.com, Ingo Molnar <mingo@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>
Subject: Re: [PATCH v2 13/35] sched: allow runtime config for PREEMPT_AUTO

On Mon, May 27, 2024 at 05:34:59PM -0700, Ankur Arora wrote:
> Reuse sched_dynamic_update() and related logic to enable choosing
> the preemption model at boot or runtime for PREEMPT_AUTO.
> 
> The interface is identical to PREEMPT_DYNAMIC.

Colour me confused, why?!? What are you doing and why aren't just just
adding AUTO to the existing DYNAMIC thing?