Re: [chrony-users] Chrony vs. Linux RNG

[Holger Hoffstätte <holger@xxxxxxxxxxxxxxxxxxxxxx>]

On 04/23/18 12:13, Miroslav Lichvar wrote:
> On Mon, Apr 23, 2018 at 11:52:00AM +0200, Holger Hoffstätte wrote:
> > Gentoo using OpenRC, chronyd 3.3. It uses start-stop-daemon and it
> > was definitely chronyd hanging the boot sequence; for tests I disabled
> > chronyd from the default runlevel and all was back to smooth sailing.
> > Since s-s-d relies on chronyd going into the background, the temporary
> > fix was to add the --background flag to s-s-d so that OpenRC returns
> > immediately.
>
> Ok, if it is blocking before the foreground process exits, that
> probably means it's not due to NTP, but something else is using random
> numbers, e.g. a timer is added to the scheduler.
>
> > I found in util.c that it *should* be using getrandom() already?
>
> It should and that's probably why it is blocking. If you disable
> HAVE_GETRANDOM, it should stop.

Indeed it does. I configured as usual but added a swift
"sed -i '/HAVE_GETRANDOM/d' config.h" post-configure, built,
removed the --background flag from s-s-d, rebooted and it
immediately starts just as before.

Now trying the other patch. :)

thanks!
Holger

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