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Re: regarding the changes to kernel entropy gathering

On Mon, Apr 05, 2021 at 09:30:16AM -0700, Greg A. Woods wrote:
> At Mon, 5 Apr 2021 10:46:19 +0200, Manuel Bouyer <> wrote:
> Subject: Re: regarding the changes to kernel entropy gathering
> >
> > If I understood it properly, there's no need for such a knob.
> > echo 0123456789abcdef0123456789abcdef > /dev/random
> >
> > will get you back to the state we had in netbsd-9, with (pseudo-)randomness
> > collected from devices.
> Well, no, not quite so much randomness.  Definitely pseudo though!
> My patch on the other hand can at least inject some real randomness into
> the entropy pool, even if it is observable or influenceable by nefarious
> dudes who might be hiding out in my garage.

As I understand it, once /dev/random has been seeded, randomness
from other devices will be taken into account (with or without your patch).

In your case, /dev/random reads did block because it didn't get
an initial seed.

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference

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