linux-kernel - Re: [PATCH] sched: Optimize __calc

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Message-ID: <CABk29NtgjoKb0-hH71XtUfQ8H=58VJh2aAY4Vs6ZaJfOpJGMrA@mail.gmail.com>
Date:   Wed, 3 Mar 2021 13:59:02 -0800
From:   Josh Don <joshdon@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...hat.com>, Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Clement Courbet <courbet@...gle.com>,
        Oleg Rombakh <olegrom@...gle.com>
Subject: Re: [PATCH] sched: Optimize __calc_delta.

> you made fact_hi u32, why can't we unconditionally use fls() ?

Thanks for clarifying with ILP32; will remove this macro and simplify
to just fls().