From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johannes Stezenbach Subject: Re: [PATCH v3 00/13] Add kdbus implementation Date: Tue, 20 Jan 2015 00:38:12 +0100 Message-ID: <20150119233812.GA1874@sig21.net> References: <1421435777-25306-1-git-send-email-gregkh@linuxfoundation.org> <20150119180642.GA27957@sig21.net> <20150119183806.GA8479@kroah.com> <20150119201906.GA337@sig21.net> <20150119203155.GA15441@kroah.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20150119203155.GA15441-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Greg Kroah-Hartman Cc: arnd-r2nGTMty4D4@public.gmane.org, ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org, gnomes-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org, teg-B22kvLQNl6c@public.gmane.org, jkosina-AlSwsSmVLrQ@public.gmane.org, luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, daniel-cYrQPVfZoowdnm+yROfE0A@public.gmane.org, dh.herrmann-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, tixxdz-Umm1ozX2/EEdnm+yROfE0A@public.gmane.org List-Id: linux-api@vger.kernel.org On Tue, Jan 20, 2015 at 04:31:55AM +0800, Greg Kroah-Hartman wrote: > On Mon, Jan 19, 2015 at 09:19:06PM +0100, Johannes Stezenbach wrote: > > These two statements somehow contradict. From my admittedly very > > limited experience, I never used D-Bus because it did not > > fit my usage scenarios: I never needed a bus, only point-to-point > > links like pipes or sockets. > > Great, then you don't need this, no need to worry about it at all, why > are we having this conversation? :) Well, for one because that's what I wanted to find out... > > Well, it made your intentions a bit clearer, but it does > > not help to sell kdbus to me, sorry ;-/ > > It's not my "goal" to sell kdbus to you, if you don't want it, great, I used this language because I think you're not providing the facts that would allow me to judge for myself whether kdbus is a good idea. Those automotive applications you were talking about, what was the OS they were ported from and what was the messaging API they used? > But odds are, you are using a system with D-Bus today, if not, then you > are using Linux in a very specific and limited manner, which is > wonderful, in that case this whole thread isn't really pertinent. > > Lots of people do use D-Bus, and for those users, that is what this > patchset is for. As I said before, I'm seeing about a dozen D-Bus messages per minute, nothing that would justify adding kdbus to the kernel for performance reasons. Wrt security I'm also not aware of any open issues with D-Bus. Thus I doubt normal users of D-Bus would see any benefit from kdbus. I also think none of the applications I can install from my distribution has any performance issue with D-Bus. And this is the point where I ask myself if I missed something. Thanks, Johannes From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752447AbbASXig (ORCPT ); Mon, 19 Jan 2015 18:38:36 -0500 Received: from mail.sig21.net ([80.244.240.74]:40958 "EHLO mail.sig21.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752371AbbASXif (ORCPT ); Mon, 19 Jan 2015 18:38:35 -0500 Date: Tue, 20 Jan 2015 00:38:12 +0100 From: Johannes Stezenbach To: Greg Kroah-Hartman Cc: arnd@arndb.de, ebiederm@xmission.com, gnomes@lxorguk.ukuu.org.uk, teg@jklm.no, jkosina@suse.cz, luto@amacapital.net, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, daniel@zonque.org, dh.herrmann@gmail.com, tixxdz@opendz.org Subject: Re: [PATCH v3 00/13] Add kdbus implementation Message-ID: <20150119233812.GA1874@sig21.net> References: <1421435777-25306-1-git-send-email-gregkh@linuxfoundation.org> <20150119180642.GA27957@sig21.net> <20150119183806.GA8479@kroah.com> <20150119201906.GA337@sig21.net> <20150119203155.GA15441@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150119203155.GA15441@kroah.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-Spam-21-Score: -2.9 (--) X-Spam-21-Report: No, score=-2.9 required=8.0 tests=ALL_TRUSTED=-1,BAYES_00=-1.9 autolearn=ham Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 20, 2015 at 04:31:55AM +0800, Greg Kroah-Hartman wrote: > On Mon, Jan 19, 2015 at 09:19:06PM +0100, Johannes Stezenbach wrote: > > These two statements somehow contradict. From my admittedly very > > limited experience, I never used D-Bus because it did not > > fit my usage scenarios: I never needed a bus, only point-to-point > > links like pipes or sockets. > > Great, then you don't need this, no need to worry about it at all, why > are we having this conversation? :) Well, for one because that's what I wanted to find out... > > Well, it made your intentions a bit clearer, but it does > > not help to sell kdbus to me, sorry ;-/ > > It's not my "goal" to sell kdbus to you, if you don't want it, great, I used this language because I think you're not providing the facts that would allow me to judge for myself whether kdbus is a good idea. Those automotive applications you were talking about, what was the OS they were ported from and what was the messaging API they used? > But odds are, you are using a system with D-Bus today, if not, then you > are using Linux in a very specific and limited manner, which is > wonderful, in that case this whole thread isn't really pertinent. > > Lots of people do use D-Bus, and for those users, that is what this > patchset is for. As I said before, I'm seeing about a dozen D-Bus messages per minute, nothing that would justify adding kdbus to the kernel for performance reasons. Wrt security I'm also not aware of any open issues with D-Bus. Thus I doubt normal users of D-Bus would see any benefit from kdbus. I also think none of the applications I can install from my distribution has any performance issue with D-Bus. And this is the point where I ask myself if I missed something. Thanks, Johannes