linux-kernel - Re: [PATCH] /dev/random: Insufficient of entropy on many architectures

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Message-ID: <CAMuHMdUGk7SL+NaZ0nHzMumiS6u5f=-au=6-8uqsPY1x1HKP5A@mail.gmail.com>
Date:	Tue, 10 Sep 2013 13:46:40 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Stephan Mueller <smueller@...onox.de>
Cc:	"Theodore Ts'o" <tytso@....edu>,
	LKML <linux-kernel@...r.kernel.org>, dave.taht@...ferbloat.net
Subject: Re: [PATCH] /dev/random: Insufficient of entropy on many architectures

On Tue, Sep 10, 2013 at 1:31 PM, Stephan Mueller <smueller@...onox.de> wrote:
> /dev/random uses the get_cycles() function to obtain entropy in addition to jiffies and the event value of hardware events.
>
> Typically the high-resolution timer of get_cycles delivers the majority of entropy, because the event value is quite deterministic and jiffies are very coarse.
>
> However, on the following architectures, get_cycles will return 0:

> - M68K

Thanks, m68k is being worked on, cfr. https://lkml.org/lkml/2013/9/9/441

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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