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From: Ankur Arora <ankur.a.arora@oracle.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ankur Arora <ankur.a.arora@oracle.com>, linux-kernel@vger.kernel.org,
        tglx@linutronix.de, torvalds@linux-foundation.org, paulmck@kernel.org,
        rostedt@goodmis.org, mark.rutland@arm.com, juri.lelli@redhat.com,
        joel@joelfernandes.org, raghavendra.kt@amd.com, sshegde@linux.ibm.com,
        boris.ostrovsky@oracle.com, konrad.wilk@oracle.com,
        Ingo Molnar
 <mingo@redhat.com>,
        Vincent Guittot <vincent.guittot@linaro.org>
Subject: Re: [PATCH v2 13/35] sched: allow runtime config for PREEMPT_AUTO
In-reply-to: <20240528162725.GH26599@noisy.programming.kicks-ass.net>
Date: Thu, 30 May 2024 02:29:45 -0700
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Peter Zijlstra <peterz@infradead.org> writes:

> 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?

You mean have a single __sched_dynamic_update()? AUTO doesn't use any
of the static_call/static_key stuff so I'm not sure how that would work.

Or am I missing the point of what you are saying?

--
ankur