Re: Services that shouldn't be started in the first place: Was F29... hide.. grub

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On Thu, 2018-06-21 at 19:27 +0200, Lennart Poettering wrote:
> On Do, 21.06.18 10:07, Adam Williamson (adamwill@xxxxxxxxxxxxxxxxx) wrote:
> 
> > On Thu, 2018-06-21 at 09:46 -0700, Gerald B. Cox wrote:
> > > Interesting... thanks Adam... but the way I read that is specifically
> > > tailored to "release criteria", not
> > > design/implementation guidelines - i.e. to me this says, don't hold up a
> > > release because someone
> > > screwed up and didn't conditionalize the process correctly.
> > 
> > I think you're being a *bit* harsh, here, btw, constantly talking about
> > how people are "screwing up". Conditionalized services are kind of an
> > advanced systemd feature and many people probably don't know about them
> > at all, and as we're discussing here, we *don't* actually have any
> > requirement that services be conditionalized in this way. I don't think
> > it's really fair to see this as packagers doing something horribly
> > wrong and bad. (Also note that it's not at all straightforward to
> > conditionalize some of these things in a reliable way - it seems
> > Lennart had to add a new feature to systemd to aid in conditionalizing
> > the secure boot-related service, and I don't think it'll be
> > particularly straightforward to find a correct conditionalization for
> > the rngd case either). It's just a situation we've identified where we
> > could possibly improve things.
> 
> Just out of curiosity: when precisely is rngd supposed to be used? As
> soon as there's a hardware RNG device /dev/hwrng? That should be
> easy enough: ConditionFileExists=/dev/hwrng... Or are there other
> cases when this is supposed to be start?

See https://bugzilla.redhat.com/show_bug.cgi?id=1490632#c42 .

> (Also, why is there a userspace component for this stuff in the first
> place? I mean streaming data from one corner of the kernel to another
> corner of the kernel is something probably better done inside of the
> kernel instead of involving userspace at all with this...)

That, I don't know, and I'd sort of wondered the same. Don't know who
can enlighten us as to the answer.
-- 
Adam Williamson
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | XMPP: adamw AT happyassassin . net
http://www.happyassassin.net
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