linux-kernel - Re: [PATCH] hrtimer: select housekeeping CPU during migration

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Message-ID: <Zco4BKuwYYI3NRIA@localhost.localdomain>
Date: Mon, 12 Feb 2024 16:23:48 +0100
From: Frederic Weisbecker <frederic@...nel.org>
To: Costa Shulyupin <costa.shul@...hat.com>
Cc: Waiman Long <longman@...hat.com>, Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hrtimer: select housekeeping CPU during migration

Le Sun, Feb 11, 2024 at 03:52:13PM +0200, Costa Shulyupin a écrit :
> because during CPU deactivation a timer can migrate
> to isolated CPU and break CPU isolation.
> 
> For reference see function get_nohz_timer_target,
> which selects CPU for new timers from housekeeping_cpumask(HK_TYPE_TIMER)
> 
> Inspired by Waiman Long <longman@...hat.com>
> 
> Signed-off-by: Costa Shulyupin <costa.shul@...hat.com>

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