linux-kernel - Re: [PATCH 2/6] nohz: Allow to check if remote CPU tick is stopped

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sat, 17 Feb 2018 11:27:00 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Frederic Weisbecker <frederic@...nel.org>
cc:     Ingo Molnar <mingo@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Chris Metcalf <cmetcalf@...lanox.com>,
        Luiz Capitulino <lcapitulino@...hat.com>,
        Christoph Lameter <cl@...ux.com>,
        "Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
        Wanpeng Li <kernellwp@...il.com>,
        Mike Galbraith <efault@....de>, Rik van Riel <riel@...hat.com>
Subject: Re: [PATCH 2/6] nohz: Allow to check if remote CPU tick is stopped

On Thu, 15 Feb 2018, Frederic Weisbecker wrote:

> This check is racy but provides a good heuristic to determine whether
> a CPU may need a remote tick or not.
> 

> +int tick_nohz_tick_stopped_cpu(int cpu)

s/int/bool/ but I'm not religious about that.

> +{
> +	struct tick_sched *ts = per_cpu_ptr(&tick_cpu_sched, cpu);
> +
> +	return ts->tick_stopped;
> +}

Other than that nit:

Reviewed-by: Thomas Gleixner <tglx@...utronix.de>