Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
References: <20190909102340.8592-1-dima@arista.com> <20190909102340.8592-5-dima@arista.com>
 <20190909111812.GB1508@uranus>
In-Reply-To: <20190909111812.GB1508@uranus>
From:   Dmitry Safonov <0x7f454c46@gmail.com>
Date:   Mon, 9 Sep 2019 12:50:27 +0100
Message-ID: <CAJwJo6YX2qQit9aTbMhg8L5+JE1EsLzKyNt0a3X97zvJ-O9dNQ@mail.gmail.com>
Subject: Re: [PATCH 4/9] select: Micro-optimise __estimate_accuracy()
To:     Cyrill Gorcunov <gorcunov@gmail.com>
Cc:     Dmitry Safonov <dima@arista.com>,
        open list <linux-kernel@vger.kernel.org>,
        Adrian Reber <adrian@lisas.de>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        Andrei Vagin <avagin@openvz.org>,
        Andy Lutomirski <luto@kernel.org>,
        Ingo Molnar <mingo@redhat.com>,
        Oleg Nesterov <oleg@redhat.com>,
        Pavel Emelyanov <xemul@virtuozzo.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Linux Containers <containers@lists.linux-foundation.org>,
        linux-fsdevel@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi Cyrill,

On Mon, 9 Sep 2019 at 12:18, Cyrill Gorcunov <gorcunov@gmail.com> wrote:
> Compiler precompute constants so it doesn't do division here.
> But I didn't read the series yet so I might be missing
> something obvious.

Heh, like a division is in ktime_divns()?

Thanks,
             Dmitry