linux-kernel - Re: [PATCH] random: wake up /dev/random writers after zap

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Message-ID: <YfVYfsDCVnKSfDSc@owl.dominikbrodowski.net>
Date:   Sat, 29 Jan 2022 16:08:46 +0100
From:   Dominik Brodowski <linux@...inikbrodowski.net>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     linux-kernel@...r.kernel.org, tytso@....edu
Subject: Re: [PATCH] random: wake up /dev/random writers after zap

Am Fri, Jan 28, 2022 at 11:49:06PM +0100 schrieb Jason A. Donenfeld:
> When account() is called, and the amount of entropy dips below
> random_write_wakeup_bits, we wake up the random writers, so that they
> can write some more in. However, the RNDZAPENTCNT/RNDCLEARPOOL ioctl
> sets the entropy count to zero -- a potential reduction just like
> account() -- but does not unblock writers. This commit adds the missing
> logic to that ioctl to unblock waiting writers.
> 
> Cc: Dominik Brodowski <linux@...inikbrodowski.net>
> Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>

Reviewed-by: Dominik Brodowski <linux@...inikbrodowski.net>

Thanks,
	Dominik