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

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Message-ID: <20150413195458.GA11672@kroah.com>
Date:	Mon, 13 Apr 2015 21:54:58 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Richard Weinberger <richard.weinberger@...il.com>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Tom Gundersen <teg@...m.no>, Jiri Kosina <jkosina@...e.cz>,
	Andy Lutomirski <luto@...capital.net>,
	LKML <linux-kernel@...r.kernel.org>, daniel@...que.org,
	David Herrmann <dh.herrmann@...il.com>,
	Djalal Harouni <tixxdz@...ndz.org>
Subject: Re: [GIT PULL] kdbus for 4.1-rc1

On Mon, Apr 13, 2015 at 09:49:27PM +0200, Richard Weinberger wrote:
> On Mon, Apr 13, 2015 at 9:42 PM, Greg Kroah-Hartman
> <gregkh@...uxfoundation.org> wrote:
> >> I remain opposed to this half thought out trash of an ABI for the
> >> meta-data.
> >
> > You don't have to enable the metadata if you don't want to use it, it's
> > an option :)
> 
> Wasn't this also an argument for CONFIG_CGROUPS?
> Now we're forced to enable it by default to boot a recent distro
> and CONFIG_CGROUPS is still not fixed.

CONFIG_CGROUPS is "not fixed"?  I think Tejun would like to have some
words with you :)

Anyway, yes, it's an option, but given that people are using this
metadata today in userspace just fine, I fail to see how having the
kernel be a transport for this same data is an issue.  When the kernel
is the transport, it can do so in a race-free way, and you can properly
do security tests/logic based on it.

thanks,

greg k-h
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