linux-kernel - Re: [PATCH v2] random: set fast pool count to zero in cpuhp teardown

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Message-ID: <CAHmME9ruM85U+dp4coBRJUBdk=iHXFZq3ZvHSiDXmpV+BoZEVw@mail.gmail.com>
Date:   Mon, 14 Feb 2022 15:42:50 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        "Theodore Ts'o" <tytso@....edu>,
        Jonathan Neuschäfer <j.neuschaefer@....net>,
        Sultan Alsawaf <sultan@...neltoast.com>,
        Dominik Brodowski <linux@...inikbrodowski.net>
Subject: Re: [PATCH v2] random: set fast pool count to zero in cpuhp teardown

Hi Sebastian,

If we move this to startup, is there a phase during which no interrupt
will arrive? That is, can this happen very very early in startup, so
that zeroing out count happens *before* ++count?

Jason