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

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Message-ID: <20100526143323.7c6f8705@schatten.dmk.lab>
Date:	Wed, 26 May 2010 14:33:23 +0200
From:	Florian Mickler <florian@...kler.org>
To:	felipe.balbi@...ia.com
Cc:	Vitaly Wool <vitalywool@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Paul@...p1.linux-foundation.org" <Paul@...p1.linux-foundation.org>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux PM <linux-pm@...ts.linux-foundation.org>
Subject: Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8)

On Wed, 26 May 2010 15:29:32 +0300
Felipe Balbi <felipe.balbi@...ia.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.

Cheers,
Flo
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