From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754432Ab0EZMd3 (ORCPT ); Wed, 26 May 2010 08:33:29 -0400 Received: from ist.d-labs.de ([213.239.218.44]:36230 "EHLO mx01.d-labs.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751740Ab0EZMd2 (ORCPT ); Wed, 26 May 2010 08:33:28 -0400 Date: Wed, 26 May 2010 14:33:23 +0200 From: Florian Mickler To: felipe.balbi@nokia.com Cc: Vitaly Wool , Peter Zijlstra , LKML , "Paul@smtp1.linux-foundation.org" , Linux OMAP Mailing List , Linux PM Subject: Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8) Message-ID: <20100526143323.7c6f8705@schatten.dmk.lab> In-Reply-To: <20100526122932.GB1990@nokia.com> References: <87wrusvrqe.fsf@deeprootsystems.com> <201005250138.16293.rjw@sisk.pl> <1274863655.5882.4875.camel@twins> <1274867106.5882.5090.camel@twins> <20100526120242.5c9b73ad@schatten.dmk.lab> <20100526133721.602633b2@schatten.dmk.lab> <20100526142430.327ccbc4@schatten.dmk.lab> <20100526122932.GB1990@nokia.com> X-Mailer: Claws Mail 3.7.6 (GTK+ 2.18.9; x86_64-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 26 May 2010 15:29:32 +0300 Felipe Balbi 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