linux-kernel - Re: 回复: [PATCH 01/10] tick/nohz: Prevent tick_nohz_get_sleep

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Message-ID: <YFDb8AzfajvlZ6iS@hirez.programming.kicks-ass.net>
Date:   Tue, 16 Mar 2021 17:25:20 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Zhou Ti (x2019cwm)" <x2019cwm@...x.ca>,
        g@...ez.programming.kicks-ass.net
Cc:     "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Frederic Weisbecker <frederic@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Yunfeng Ye <yeyunfeng@...wei.com>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Marcelo Tosatti <mtosatti@...hat.com>,
        Ingo Molnar <mingo@...nel.org>,
        "rafael@...nel.org" <rafael@...nel.org>
Subject: Re: 回复: [PATCH 01/10] tick/nohz: Prevent
 tick_nohz_get_sleep_length() from returning negative value

On Tue, Mar 16, 2021 at 04:08:08PM +0000, Zhou Ti (x2019cwm) wrote:
> But I don't think it's a good idea to handle this in callers, because
> logically the function shouldn't return negative values. Returning 0
> directly would allow idle governors to get another chance to select
> again.


A: Because it messes up the order in which people normally read text.
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