linux-kernel - Re: [PATCH v3 00/13] Add kdbus implementation

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Date:	Tue, 20 Jan 2015 15:12:52 +0100
From:	"Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
To:	Johannes Stezenbach <js@...21.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:	mtk.manpages@...il.com, arnd@...db.de, ebiederm@...ssion.com,
	gnomes@...rguk.ukuu.org.uk, teg@...m.no, jkosina@...e.cz,
	luto@...capital.net, linux-api@...r.kernel.org,
	linux-kernel@...r.kernel.org, daniel@...que.org,
	dh.herrmann@...il.com, tixxdz@...ndz.org
Subject: Re: [PATCH v3 00/13] Add kdbus implementation

On 01/20/2015 02:24 PM, Johannes Stezenbach wrote:
> On Tue, Jan 20, 2015 at 07:26:09PM +0800, Greg Kroah-Hartman wrote:
>> On Tue, Jan 20, 2015 at 11:57:12AM +0100, Johannes Stezenbach wrote:

>>> My guess is that the people porting from QNX were just confused
>>> and their use of D-Bus was in error.  Maybe they should've used
>>> plain sockets, capnproto, ZeroMQ or whatever.
>>
>> I tend to trust that they knew what they were doing, they wouldn't have
>> picked D-Bus for no good reason.
> 
> The automotive developers I had the pleasure to work with would
> use anything which is available via a mouse click in the
> commercial Embedded Linux SDK IDE of their choice :)
> Let's face it: QNX has a single IPC solution while Linux has
> a confusing multitude of possibilities.

Greg, from my spell in IVI, I too have to say your faith in the
wisdom of IVI developers' choices is touching. I think D-Bus was 
in the main picked because it had some nice features, but then 
people realized it had no bandwidth, and the solution has been 
"make D-Bus faster", rather than "maybe we should explore 
other (mixed model) solutions". This isn't to say that I'm
against adding kdbus, but I don't think there's much strength to
the argument you make above.

Cheers,

Michael


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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