Martin J. Bligh wrote:
> --On Friday, August 27, 2004 10:46:45 +1000 Con Kolivas <kernel@kolivas.org> wrote:
> 
> 
>>Nuno Silva wrote:
>>
>>>Con Kolivas wrote:
>>>
>>>>If you're talking about using the embedded image viewer in kde, that 
>>>>spins on wait and wastes truckloads of cpu (a perfect example of poor 
>>>>coding). Try loading it an external viewer and it will be 1000 times 
>>>>faster. If you're talking about it keeping the disk too busy on the 
>>>>other hand, that's I/O scheduling.
>>>>
>>>
>>>The question is: "can a poorly coded app hang the system for 30secs?"
>>>
>>>That's a DoS ;-)
>>
>>It does not hang the system, only it's dependant tasks (ie other kde thingies)
> 
> 
> the display app (not KDE), however, at least seems to deny X of enough time 
> that the mouse cursor won't move. Much badness! ;-)

Yes, priority inversion is a nasty thing indeed.

Cheers,
Con