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Date: Wed, 9 Oct 2024 10:50:21 +0200
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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: tglx@linutronix.de, mingo@kernel.org, linux-kernel@vger.kernel.org,
	juri.lelli@redhat.com, vincent.guittot@linaro.org,
	dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com,
	mgorman@suse.de, vschneid@redhat.com, ankur.a.arora@oracle.com,
	efault@gmx.de
Subject: Re: [PATCH 2/5] sched: Add Lazy preemption model
Message-ID: <20241009085021.cw9147B8@linutronix.de>
References: <20241007074609.447006177@infradead.org>
 <20241007075055.331243614@infradead.org>
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In-Reply-To: <20241007075055.331243614@infradead.org>

On 2024-10-07 09:46:11 [+0200], Peter Zijlstra wrote:
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -1103,6 +1106,32 @@ void resched_curr(struct rq *rq)
=E2=80=A6
> +static __always_inline int tif_need_resched_lazy(void)

The naming is a bit confusing here because tif_need_resched() checks if
the TIF_NEED_RESCHED is set while this returns the proper TIF bit
instead.

> +{
> +	if (dynamic_preempt_lazy())
> +		return TIF_NEED_RESCHED_LAZY;
> +
> +	return TIF_NEED_RESCHED;
> +}

Sebastian