Re: [HEADS-UP] Please test kdbus in Rawhide!

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On Thu, Jul 30, 2015 at 11:20 AM, Josh Boyer <jwboyer@xxxxxxxxxxxxxxxxx> wrote:
> On Thu, Jul 30, 2015 at 2:05 PM, Stephen Gallagher <sgallagh@xxxxxxxxxx> wrote:
>> On Thu, 2015-07-30 at 19:57 +0200, Lennart Poettering wrote:
>>> Heya!
>>>
>>> I'd like to ask everybody to test kdbus on Rawhide. Josh thankfully
>>> added it to the Rawhide kernel packages, and our systemd RPMs come
>>> with built-in support, too now. If you are running an up-to-date
>>> Rawhide system adding "kdbus=1" to your kernel command line is hence
>>> everything you need to run kdbus instead of dbus-daemon. (No
>>> additional RPMs need to be installed.) If you do, things should just
>>> work the same way as before, if we did everything right. By adding or
>>> dropping "kdbus=1" to/from the command line you can enable kdbus or
>>> revert back to dbus1 on each individual boot.
>>>
>>> This stuff is opt-in, and we are very keen on getting feedback and
>>> testing for this. The version of kdbus in Rawhide we consider API
>>> stable, there is a complete client side available now in systemd,
>>> with
>>> a client API in sd-bus. Compatibility with good old dbus1 is provided
>>> by the "systemd-bus-proxy" service.
>>>
>>> The folks involved in kdbus development have been running this code
>>> on
>>> their systems for more than half a year now. There were occasional
>>> hiccups, but we fixed everything we ran into, and it works pretty
>>> well
>>> now. Our focus was specifically on providing the best possible
>>> compatibility with dbus1. Now we'd like to increase the testing
>>> audience and added this to Rawhide because of this.
>>>
>>> Further information about kdbus and how to get started you may find
>>> here:
>>>
>>>         http://www.freedesktop.org/wiki/Software/systemd/kdbus/
>>>
>>> We'd very thankful for every Fedora developer testing this and
>>> providing bug reports! Any feedback is highly appreciated.
>>>
>>> Also, should you attend our upcoming conference, we might return the
>>> favour by buying you a beer or two:
>>>
>>>         https://systemd.events/
>>>
>>> Thank you,
>>>
>>> Lennart
>>
>>
>> For folks not keen to jump headfirst into Rawhide, is it expected that
>> this should work on Fedora 23 or Fedora 22 if one installs only the
>> kernel and systemd packages from Rawhide? That might make people more
>> comfortable trying it out (and get you more feedback), if so.
>
> You'll probably only need the rawhide kernel.  IIRC, the systemd
> package was kdbus ready before the branch was created.

The last time I tried this (maybe a month ago in Rawhide), booting
with kdbus=1 hung very quickly.  I was told that it needed newer
systemd to work, so I'd be a bit surprised if F22 is reliable.

--Andy
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