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base repository: NixOS/nixpkgs
base: 159760a95538
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head repository: NixOS/nixpkgs
compare: 26c98e742f22
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  • 2 commits
  • 2 files changed
  • 2 contributors

Commits on Sep 10, 2020

  1. nixos/modules/security/rngd: Disable by default 

    `rngd` seems to be the root cause for slow boot issues, and its functionality is
redundant since kernel v3.17 (2014), which introduced a `krngd` task (in kernel
space) that takes care of pulling in data from hardware RNGs:

> commit be4000bc4644d027c519b6361f5ae3bbfc52c347
> Author: Torsten Duwe <duwe@lst.de>
> Date:   Sat Jun 14 23:46:03 2014 -0400
>
>     hwrng: create filler thread
>
>     This can be viewed as the in-kernel equivalent of hwrngd;
>     like FUSE it is a good thing to have a mechanism in user land,
>     but for some reasons (simplicity, secrecy, integrity, speed)
>     it may be better to have it in kernel space.
>
>     This patch creates a thread once a hwrng registers, and uses
>     the previously established add_hwgenerator_randomness() to feed
>     its data to the input pool as long as needed. A derating factor
>     is used to bias the entropy estimation and to disable this
>     mechanism entirely when set to zero.

Closes: #96067
(cherry picked from commit e64d3f6)
    @nbraud @worldofpeace
    nbraud authored and worldofpeace committed Sep 10, 2020
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  2. rl-2009: document rngd 

    (cherry picked from commit ca674c1)
    @worldofpeace
    worldofpeace committed Sep 10, 2020
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