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

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Message-ID: <b2c478b3-91bf-3ffa-b283-2b80e46a1165@redhat.com>
Date:   Sun, 29 Apr 2018 17:32:15 -0700
From:   Laura Abbott <labbott@...hat.com>
To:     "Theodore Y. Ts'o" <tytso@....edu>,
        Sultan Alsawaf <sultanxda@...il.com>,
        Pavel Machek <pavel@....cz>, linux-kernel@...r.kernel.org,
        Jann Horn <jannh@...gle.com>
Subject: Re: Linux messages full of `random: get_random_u32 called from`

On 04/29/2018 03:05 PM, Theodore Y. Ts'o wrote:
> What would be useful is if people gave reports that listed exactly
> what laptop and distributions they are using.  Just "a high spec x86
> laptop" isn't terribly useful, because*my*  brand-new Dell XPS 13
> running Debian testing is working just fine.  The year, model, make,
> and CPU type plus what distribution (and distro version number) you
> are running is useful, so I can assess how wide spread the unhappiness
> is going to be, and what mitigation steps make sense.

I'm pretty sure Fedora is hitting this in our VMs. I just spent some
time debugging an issue of a boot delay with someone from the
infrastructure team where it would take upwards of 2 minutes to boot.
If someone holds down a key, it boots in 4 seconds. There's a qemu
reproducer at https://bugzilla.redhat.com/show_bug.cgi?id=1572916#c3
I suggested a cat on the keyboard as a workaround.

Independently, we also got a report of a boot hang in GCE with 4.16.4
where as 4.16.3 works which corresponds to the previous report of a
stable regression. This was just via IRC so I didn't have time to
dig into this.

Thanks,
Laura