linux-kernel - Re: [patch V2 16/50] posix-cpu-timers: Simplify posix_cpu_timer

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Date: Mon, 15 Apr 2024 17:28:14 +0200
From: Anna-Maria Behnsen <anna-maria@...utronix.de>
To: Thomas Gleixner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org>
Cc: Frederic Weisbecker <frederic@...nel.org>, 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 V2 16/50] posix-cpu-timers: Simplify posix_cpu_timer_set()

Thomas Gleixner <tglx@...utronix.de> writes:

> 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.
>

Reviewed-by: Anna-Maria Behnsen <anna-maria@...utronix.de>