Request for feedback and/or participation on https://fedoraproject.org/wiki/Features/PowerManagement

[Colin Walters]

On Wed, Feb 4, 2009 at 1:13 PM, Colin Walters <walters at verbum.org> wrote:
> On Wed, Feb 4, 2009 at 11:37 AM, Olivier Galibert <galibert at pobox.com> wrote:
>> On Wed, Feb 04, 2009 at 01:42:42PM +0000, Richard Hughes wrote:
>>> Well, sending the data does cause a wakeup, yes. The interface stops
>>> polling if there's no client connected.
>>
>> If I understood correctly, the problem was more about the "wideness"
>> of the wakeup, i.e. everything connected to the bus was waking up,
>> unswapping, etc rather than just what was interested by the message.
>
> Almost certainly what you're thinking of (or have heard about) is the
> NameOwnerChanged problem:
> http://bugs.freedesktop.org/show_bug.cgi?id=14183
>
> It's definitely something we should fix (and the system was designed
> to support avoid wakeups), but it's certainly not as bad as every
> process waking up on every message; just when something joins or
> leaves the bus.

And, just for anyone keeping score at home about DBus and power
consumption, a patch exists now in that bug.