Schedule for Monday's FESCo Meeting (2012-06-18)

[Michal Hlavinka]

On 06/18/2012 01:22 PM, Richard Hughes wrote:
> On 18 June 2012 12:03, Benny Amorsen<benny+usenet at amorsen.dk>  wrote:
>> Why testing the daemons? Any daemon which cannot be restarted by
>> systemctl restart foo.daemon is broken already.
>
> Try booting a few VMs and then doing "systemctl restart
> libvirtd.daemon" -- libvirtd restarts okay (hopefully) but all the
> clients are disconnected and all the VMs are no longer running.
> Restarting a daemon really means "pause, dump all
> in-process-stuff-to-disk, exit-cleaning-up,
> load-and-detect-saved-state-and-convert-if-required, un-pause" --
> that's a different thing entirely to "reload".
>
>> Requiring a log out is ok IMHO, if there are processes in the session
>> still having the old library mapped after the upgrade. If there are
>> processes which are neither daemons nor part of a session, we should
>> probably have a good look at why.
>
> Although I agree with your last statement, if you have more than one
> user logged in (or use fast-user-switching), the premise of a session
> re-login allowing all the open applications to relink against new
> library versions breaks down.

How is the above different from restarting a computer? If you can 
"aggressively" reboot computer with daemons or (different user) sessions 
running, you can also restart (or even stop-update-start) them all with 
the same effect.