linux-kernel - Re: [PATCH v4 2/4] sched/isolation: Make "isolcpus=nohz" equivalent to "nohz

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Message-ID: <ZvV9D-aZ3bKd3cmK@localhost.localdomain>
Date: Thu, 26 Sep 2024 17:26:07 +0200
From: Frederic Weisbecker <frederic@...nel.org>
To: Waiman Long <longman@...hat.com>
Cc: 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>,
	Valentin Schneider <vschneid@...hat.com>,
	linux-kernel@...r.kernel.org, Phil Auld <pauld@...hat.com>
Subject: Re: [PATCH v4 2/4] sched/isolation: Make "isolcpus=nohz" equivalent
 to "nohz_full"

Le Sat, Sep 21, 2024 at 03:07:18PM -0400, Waiman Long a écrit :
> The "isolcpus=nohz" boot parameter and flag were used to disable tick
> when running a single task.  Nowsdays, this "nohz" flag is seldomly used
> as it is included as part of the "nohz_full" parameter.  Extend this
> flag to cover other kernel noises disabled by the "nohz_full" parameter
> to make them equivalent. This also eliminates the need to use both the
> "isolcpus" and the "nohz_full" parameters to fully isolated a given
> set of CPUs.
> 
> Suggested-by: Frederic Weisbecker <frederic@...nel.org>
> Signed-off-by: Waiman Long <longman@...hat.com>

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