Re: RFC: OpenRC as Init System for Debian
* Carlos Alberto Lopez Perez <clopez@igalia.com> [2012-05-01 23:07]:
> On 27/04/12 19:33, Tollef Fog Heen wrote:
> > ]] Martin Wuertele
> >
> >> * Josselin Mouette <joss@debian.org> [2012-04-27 09:53]:
> >>
> >>> Le jeudi 26 avril 2012 à 22:29 +0200, Svante Signell a écrit :
> >>>>> Yes of course, because event-driven init systems have *always* been
> >>>>> *only* about mounting USB devices.
> >>>>
> >>>> Then explain the _real_ reasons for having an event driven boot system!
> >>>
> >>> BECAUSE THE LINUX KERNEL IS EVENT DRIVEN.
> >>
> >> That's a reason for udev/mdev, however I still fail to see why this
> >> results in the requirement for an event based boot process.
> >
> > A trivial example is $remote_fs isn't satisfied until /srv/somewhere is
> > mounted and /srv/somewhere comes off iscsi, which means it requires
> > networking to be up, which means network drivers loaded, etc. So the
> > event «network driver loaded» causes ifup to be spawned, which causes
> > $network to be satisfied which causes the iscsi daemons to be started
> > which causes mount to be called.
> >
>
> A better example is bluetooth.
>
> In my Debian system I have /usr/sbin/bluetoothd running and I don't have
> any bluetooth devices on my system... So wouldn't be better that instead
> of launching the bluetooth daemon and let it waiting for the day that I
> plug a USB bluetooth device (and still I never did that) to just launch
> this daemon only when the kernel detects a bluetooth device?
I don't think this is a better example. Actually I think this is an
example where udev/mdev could launch/stop bluetoothd.
Yours Martin
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