Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8)

[Peter Zijlstra <peterz@infradead.org>]

On Wed, 2010-05-26 at 14:33 +0200, Florian Mickler wrote:
> On Wed, 26 May 2010 15:29:32 +0300
> Felipe Balbi <felipe.balbi@nokia.com> wrote:
> 
> > hi,
> > 
> > On Wed, May 26, 2010 at 02:24:30PM +0200, ext Florian Mickler wrote:
> > >And if you have two kernels, one with which your device is dead after 1
> > >hour and one with which your device is dead after 10 hours. Which would
> > >you prefer? I mean really... this is ridiculous.
> > 
> > What I find ridiculous is the assumption that kernel should provide good 
> > power management even for badly written applications. They should work, 
> > of course, but there's no assumption that the kernel should cope with 
> > those applications and provide good battery usage on those cases.
> > 
> > You can install and run anything on the device, and they will work as 
> > they should (they will be scheduled and will be processed) but you can't 
> > expect the kernel to prevent that application from waking up the CPU 
> > every 10 ms simply because someone didn't think straight while writting 
> > the app.
> > 
> 
> But then someone at the user side has to know what he is doing. 
> 
> I fear, if you target mass market without central distribution
> channels, you can not assume that much.

Provide the developers and users with tools. 

Notify the users that their phone is using power at an unadvised rate
due to proglet $foo.

Also, if you can integrate into the development environment and provide
developers instant feedback on suckage of their app they can react and
fix before letting users run into the issue.