linux-kernel - Re: [PATCH] sched/isolation: Warn about missing isolcpus mask

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Message-ID: <ZZ6lyc5MB9CgNoBi@localhost.localdomain>
Date: Wed, 10 Jan 2024 15:12:25 +0100
From: Frederic Weisbecker <frederic@...nel.org>
To: Valentin Schneider <vschneid@...hat.com>
Cc: linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Juri Lelli <juri.lelli@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
	Daniel Bristot de Oliveira <bristot@...hat.com>
Subject: Re: [PATCH] sched/isolation: Warn about missing isolcpus mask

Le Wed, Jan 10, 2024 at 12:46:10PM +0100, Valentin Schneider a écrit :
> Since an empty string is a valid cpulist, this cmdline option does not
> trigger any warnings:
> 
>   isolcpus=domain,
> 
> housekeeping_setup() just carries on and we end up with the housekeeping
> mask being all CPUs in the system.
> 
> Check that there *is* a cpulist and that it isn't empty.
> 
> Signed-off-by: Valentin Schneider <vschneid@...hat.com>

Acked-by: Frederic Weisbecker <frederic@...nel.org>