[OLPC Security] Audio applications

[Bert Freudenberg]

On Nov 21, 2007, at 22:12 , Ivan Krstić wrote:

> On Nov 21, 2007, at 4:10 PM, Bert Freudenberg wrote:
>> The answer to this has always been "there are no background  
>> activities".
>
> That's the first time I've heard this answer. Can you elaborate?

Well that's the answer the Sugar guys give. As soon as an activity  
goes into the background, it has to release all resources such as  
camera, mic, speaker, whatever. And it has to be prepared to be  
kicked out on short notice by the oom killer. Switching to the  
activity again would resume the activity in that case.

So, an activity that is not in the foreground is invisible,  
inaudible, must not take CPU time - for practical purposes that means  
it is not there. Having it still in RAM is simply caching.

Or I am grossly misunderstanding, but that is what I got from various  
discussions.

- Bert -