From: Thomas Gleixner <tglx@linutronix.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Anna-Maria Behnsen <anna-maria@linutronix.de>,
Marcelo Tosatti <mtosatti@redhat.com>,
Frederic Weisbecker <frederic@kernel.org>,
Peter Xu <peterx@redhat.com>,
Nitesh Narayan Lal <nitesh@redhat.com>,
Alex Belits <abelits@marvell.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
John Stultz <john.stultz@linaro.org>
Subject: Re: [patch 2/8] hrtimer: Force clock_was_set() handling for the HIGHRES=n, NOHZ=y case
Date: Wed, 12 May 2021 18:40:49 +0200 [thread overview]
Message-ID: <87r1ibewha.ffs@nanos.tec.linutronix.de> (raw)
In-Reply-To: <YJvtVD/SotLoZU/U@hirez.programming.kicks-ass.net>
On Wed, May 12 2021 at 16:59, Peter Zijlstra wrote:
> On Tue, Apr 27, 2021 at 10:25:39AM +0200, Thomas Gleixner wrote:
>> void clock_was_set(void)
>> {
>> + if (!hrtimer_hres_active() && !tick_nohz_active)
>> + goto out_timerfd;
>> +
>> /* Retrigger the CPU local events everywhere */
>> on_each_cpu(retrigger_next_event, NULL, 1);
>> +
>> +out_timerfd:
>> timerfd_clock_was_set();
>> }
>
> Isn't that simpler when written like:
>
> if (hrtimer_hres_active() || tick_nohz_active())
> on_each_cpu(retrigger_next_event, NULL, 1);
>
> timerfd_clock_was_set();
>
> ?
Yes, but look at the later patches. Then we'll introduce it there. :)
next prev parent reply other threads:[~2021-05-12 19:35 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-27 8:25 [patch 0/8] hrtimers: Overhaul the clock_was_set() logic Thomas Gleixner
2021-04-27 8:25 ` [patch 1/8] hrtimer: Ensure timerfd notification for HIGHRES=n Thomas Gleixner
2021-04-27 8:25 ` [patch 2/8] hrtimer: Force clock_was_set() handling for the HIGHRES=n, NOHZ=y case Thomas Gleixner
2021-05-12 14:59 ` Peter Zijlstra
2021-05-12 16:40 ` Thomas Gleixner [this message]
2021-04-27 8:25 ` [patch 3/8] timerfd: Provide timerfd_resume() Thomas Gleixner
2021-04-27 8:25 ` [patch 4/8] timekeeping: Distangle resume and clock-was-set events Thomas Gleixner
2021-04-27 8:25 ` [patch 5/8] time/timekeeping: Avoid invoking clock_was_set() twice Thomas Gleixner
2021-04-27 8:25 ` [patch 6/8] hrtimer: Add bases argument to clock_was_set() Thomas Gleixner
2021-04-27 8:25 ` [patch 7/8] hrtimer: Avoid unnecessary SMP function calls in clock_was_set() Thomas Gleixner
2021-05-13 14:59 ` Peter Zijlstra
2021-05-14 18:52 ` Thomas Gleixner
2021-05-14 23:28 ` Peter Zijlstra
2021-05-15 0:24 ` Thomas Gleixner
2021-04-27 8:25 ` [patch 8/8] hrtimer: Avoid more " Thomas Gleixner
2021-04-27 15:11 ` Marcelo Tosatti
2021-04-27 19:59 ` Thomas Gleixner
2021-04-30 7:12 ` [patch V2 " Thomas Gleixner
2021-04-30 16:49 ` Marcelo Tosatti
2021-05-13 7:47 ` Peter Zijlstra
2021-05-14 19:08 ` Thomas Gleixner
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