linux-kernel - Re: [PATCH v4 12/14] rv: Replace tss and sncid monitors with more complete sts

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Message-ID: <20250721151539.EXglDXpl@linutronix.de>
Date: Mon, 21 Jul 2025 17:15:39 +0200
From: Nam Cao <namcao@...utronix.de>
To: Gabriele Monaco <gmonaco@...hat.com>
Cc: linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	Jonathan Corbet <corbet@....net>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	linux-trace-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Tomas Glozar <tglozar@...hat.com>, Juri Lelli <jlelli@...hat.com>,
	Clark Williams <williams@...hat.com>,
	John Kacur <jkacur@...hat.com>
Subject: Re: [PATCH v4 12/14] rv: Replace tss and sncid monitors with more
 complete sts

On Mon, Jul 21, 2025 at 10:23:22AM +0200, Gabriele Monaco wrote:
> The tss monitor currently guarantees task switches can happen only while
> scheduling, whereas the sncid monitor enforces scheduling occurs with
> interrupt disabled.
> 
> Replace the monitors with a more comprehensive specification which
> implies both but also ensures that:
> * each scheduler call disable interrupts to switch
> * each task switch happens with interrupts disabled
> 
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> 
> fixup sts remove sncid

Is this here by accident?

I cannot comment on the model. The CONFIG_X86_LOCAL_APIC case looks
complex, but I cannot comment on that either.

But things look fine from RV perspective, so:
Acked-by: Nam Cao <namcao@...utronix.de>