linux-kernel - Re: [patch V3 16/51] posix-cpu-timers: Simplify posix_cpu_timer

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Message-ID: <Znikg9RypWnjBxRn@pavilion.home>
Date: Mon, 24 Jun 2024 00:41:07 +0200
From: Frederic Weisbecker <frederic@...nel.org>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: LKML <linux-kernel@...r.kernel.org>,
	Anna-Maria Behnsen <anna-maria@...utronix.de>,
	John Stultz <jstultz@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
	Eric Biederman <ebiederm@...ssion.com>,
	Oleg Nesterov <oleg@...hat.com>
Subject: Re: [patch V3 16/51] posix-cpu-timers: Simplify posix_cpu_timer_set()

Le Mon, Jun 10, 2024 at 06:42:25PM +0200, Thomas Gleixner a écrit :
> Avoid the late sighand lock/unlock dance when a timer is not armed to
> enforce reevaluation of the timer base so that the process wide CPU timer
> sampling can be disabled.
> 
> Do it right at the point where the arming decision is made which already
> has sighand locked.
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

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