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SubjectRe: [PATCH 01/13] kdbus: add documentation
Hi all,

On Tue, Jan 20, 2015 at 03:53:53PM +0100, Djalal Harouni wrote:
> On Tue, Jan 20, 2015 at 09:42:59AM -0500, Josh Boyer wrote:
> > On Tue, Jan 20, 2015 at 9:31 AM, David Herrmann <> wrote:
> > >
> > > If you run a 3.18 kernel, you can install kdbus.ko from our repository
> > > and boot a full Fedora system running Gnome3 with kdbus, given that
> > > you compiled systemd with --enable-kdbus (which is still
> > > experimental). No legacy dbus1 daemon is running. Instead, we have a
> > > bus-proxy that converts classic dbus1 to kdbus, so all
> > > bus-communication runs on kdbus.
> >
> > FWIW, we've been building a "playground" repository for the kernel
> > that contains this already for Fedora. If you have a stock Fedora 21
> > or rawhide install, you can use:
> >
> >
> >
> > which has the kernel+kdbus and systemd built with --enable-kdbus
> > already. Easy enough to throw in a VM for testing.
> Another addition, if kdbus is installed and loaded, you could also use
> systemd-nspawn to boot a full system (systemd compiled with
> --enable-kdbus) in a container [1], kdbusfs will be mounted in the
> container.
> There is also the busctl tool to query kdbus...

It is reassuring that kdbus actually works :)

However, let me repeat and rephrase my previous questions:
Is there a noticable or measurable improvement from using kdbus?
IOW, is the added complexity of kdbus worth the result?

I have stated my believe that current usage of D-Bus is not
performance sensitive and the number of messages exchanged
is low. I would love it if you would prove me wrong.
Or if you could show that any D-Bus related bug in Gnome3
is fixed by kdbus.

I would sooo love it if someone would finally post some
data that proves kdbus is useful beyond systemd.


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