linux-kernel - Re: Linux messages full of `random: get_random

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Message-ID: <20180429183057.kk666r4z5biamzvs@sultan-box>
Date:   Sun, 29 Apr 2018 11:30:57 -0700
From:   Sultan Alsawaf <sultanxda@...il.com>
To:     "Theodore Y. Ts'o" <tytso@....edu>, linux-kernel@...r.kernel.org,
        Jann Horn <jannh@...gle.com>
Subject: Re: Linux messages full of `random: get_random_u32 called from`

I'd also like to add that my high-spec x86 laptop exhibits the same issue as
my Edgar Chromebook.

Here's my dmesg: https://hastebin.com/dofejolobi.go

The most interesting line:
[   90.811633] random: crng init done

I waited 90 seconds after boot to provide entropy myself, at which point crng
init completed. In other words, crng init only completed because I provided
the entropy by smashing the keyboard. I could've waited longer and crng init
wouldn't have completed without my input.

Mind you, this laptop has a 45W CPU, so power savings were definitely not
considered in its design. Do you have any machines that can provide enough
boot entropy to satisfy crng init without requiring user-provided entropy?

Sultan