linux-kernel - Re: [patch V2 08/10] timer: Implement the hierarchical pull model

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Message-ID: <20170419072054.3bxb7fapyj7jodnn@hirez.programming.kicks-ass.net>
Date:   Wed, 19 Apr 2017 09:20:54 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        John Stultz <john.stultz@...aro.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Anna-Maria Gleixner <anna-maria@...utronix.de>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        linux-pm@...r.kernel.org, Arjan van de Ven <arjan@...radead.org>,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Frederic Weisbecker <fweisbec@...il.com>,
        Rik van Riel <riel@...hat.com>
Subject: Re: [patch V2 08/10] timer: Implement the hierarchical pull model

On Tue, Apr 18, 2017 at 01:11:10PM +0200, Thomas Gleixner wrote:
> +++ b/kernel/time/timer.c

> @@ -185,6 +186,10 @@ EXPORT_SYMBOL(jiffies_64);
>  #define WHEEL_SIZE	(LVL_SIZE * LVL_DEPTH)
>  
>  #ifdef CONFIG_NO_HZ_COMMON
> +/*
> + * If multiple bases need to be locked, use the base ordering for lock
> + * nesting, i.e. lowest number first.
> + */
>  # define NR_BASES	3
>  # define BASE_LOCAL	0
>  # define BASE_GLOBAL	1

You already used that in previous patches, should this comment go there?