linux-kernel - Re: [PATCH v2 5/5] rv: Add rts monitor

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Message-ID: <20250819075457.AqRdkkvf@linutronix.de>
Date: Tue, 19 Aug 2025 09:54:57 +0200
From: Nam Cao <namcao@...utronix.de>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Gabriele Monaco <gmonaco@...hat.com>,
	linux-trace-kernel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...hat.com>, Juri Lelli <juri.lelli@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
	Valentin Schneider <vschneid@...hat.com>,
	K Prateek Nayak <kprateek.nayak@....com>
Subject: Re: [PATCH v2 5/5] rv: Add rts monitor

On Fri, Aug 15, 2025 at 03:48:51PM +0200, Peter Zijlstra wrote:
> On Wed, Aug 06, 2025 at 10:01:21AM +0200, Nam Cao wrote:
> > Add "real-time scheduling" monitor, which validates that SCHED_RR and
> > SCHED_FIFO tasks are scheduled before tasks with normal and extensible
> > scheduling policies
> 
> The actual monitor seems to know about deadline too. Surely changelog
> and document need updating?

Yes.

> While there, you should probably extend to cover at least STOP class,
> but possibly also IDLE class, no? Validating: IDLE < EXT < FAIR <
> FIFO/RR < DL < STOP.

Right, I forgot that idle and stop exists. Thanks for the reminder.

Nam