linux-kernel - Re: [GIT PULL] kdbus for 4.1-rc1

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Message-ID: <20150415122736.GA20554@kroah.com>
Date:	Wed, 15 Apr 2015 14:27:36 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Andy Lutomirski <luto@...capital.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Tom Gundersen <teg@...m.no>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Daniel Mack <daniel@...que.org>,
	David Herrmann <dh.herrmann@...il.com>,
	Djalal Harouni <tixxdz@...ndz.org>
Subject: Re: [GIT PULL] kdbus for 4.1-rc1

On Wed, Apr 15, 2015 at 02:09:24PM +0200, Jiri Kosina wrote:
> On Wed, 15 Apr 2015, Greg Kroah-Hartman wrote:
> 
> > 'systemctl reboot' calls a bunch of other things to determine if you
> > have local access to the machine, or permissions to reboot the machine
> > (i.e. CAP_SYS_BOOT), and other things that polkit might allow you to do,
> > and then, it decides to reboot or not.  That happens today, right?  I
> > don't understand the argument here.
> 
> And what exactly is the argument that this is the way it should be 
> implemnted?

I can't answer that, discuss it with the developers of that userspace
code please.

> Why can't it just rely on the kernel to provide final answer to "to reboot 
> or not to reboot, that is the question"?

Usually you want to do a few things before telling the kernel to reboot,
like unmount all filesystems and the like :)

Anyway, we are getting away from the code at hand, please, let's discuss
that.

greg k-h
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