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

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Message-ID: <CAHmME9oZMFN80M98Mt6JysPSMTJoXfKTjHuxG6BQSsC=+0z5fg@mail.gmail.com>
Date:   Fri, 11 Feb 2022 18:17:57 +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

On Fri, Feb 11, 2022 at 6:15 PM Sebastian Andrzej Siewior
<bigeasy@...utronix.de> wrote:
> A CPU hotplug notifier which removes unconditionally that bit when the
> CPU goes down or sets it to 0.
> We can keep it as it. Just an idea for later maybe ;)

I looked into it and it seemed like the plumbing was kind of miserable
for that. If you want to take a stab, though, that might be an okay
followup patch, and then we can assess atomics vs notifier. I think
notifier will wind up being a lot clunkier, though.

Sounds like we should be all set for the v7 I sent out?

Jason