[arch-general] Upgrading while using a package (WAS: Re: pacman -Syu -- then tons of kio and kbuildsycoca warnings. Bug or coincidence?)

[Stefan Husmann]

Am 14.10.2010 08:40, schrieb diederick:
> On 10/13/2010 11:03 PM, David Rosenstrauch wrote:
> 
>> On 10/09/2010 12:57 AM, David C. Rankin wrote:
>>> Guys, just updated and got a slew of warning dumped back to konsole:
> 
>> Nothing strange to me at all:  you're upgrading qt while you're in KDE
>> (which uses qt).  It's never a good idea to upgrade a package while it's
>> being used.  If you're upgrading a daemon, shut down the daemon first;
>> if you're upgrading qt, exit KDE first; if you're upgrading the kernel,
>> udev, etc., drop to single user mode first.
> 
> I didn't know that, nor did I read that somewhere on the wiki. Why is
> this? Aren't programs copied to memory (i.e. loaded) before being used?
> In that case, isn't the upgraded version left alone until it is loaded
> the next time the program is started? Where can I find more on this?
> 
> Thanks,
> Diederick
> 
> -- 
> http://www.diederickdevries.net/
> 
> 

Hello,

in general you are right, but you never know. Programs are doing something. 
Some may reload data files even or program code at runtime. 

Regards Stefan