linux-kernel - Re: [PATCH v6] random: defer fast pool mixing to worker

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Message-ID: <CAHmME9qR02XCX48D+AoT1rOFyNo_GXubyHPzoX01BYkJDX7p1A@mail.gmail.com>
Date:   Fri, 11 Feb 2022 18:00:21 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        "Theodore Ts'o" <tytso@....edu>,
        Sultan Alsawaf <sultan@...neltoast.com>,
        Jonathan Neuschäfer <j.neuschaefer@....net>,
        Dominik Brodowski <linux@...inikbrodowski.net>
Subject: Re: [PATCH v6] random: defer fast pool mixing to worker

Hi Sebastian,

On Fri, Feb 11, 2022 at 5:59 PM Sebastian Andrzej Siewior
<bigeasy@...utronix.de> wrote:
> > Okay, I'll do that then, and then in the process get rid of the
> > cmpxchg loop since it's no longer required.
>
> So the only reason why we have that atomic_t is for rare case where run
> on the remote CPU and need to remove the upper bit in the counter?

Yes. That's the only remaining reason. Annoying, but whatareyagonnado?

Jason