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

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Message-ID: <20100527143508.GA30117@srcf.ucam.org>
Date:	Thu, 27 May 2010 15:35:08 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Arve Hjønnevåg <arve@...roid.com>,
	Florian Mickler <florian@...kler.org>,
	Vitaly Wool <vitalywool@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Paul@...p1.linux-foundation.org, felipe.balbi@...ia.com,
	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 Thu, May 27, 2010 at 04:28:51PM +0200, Peter Zijlstra wrote:
> On Thu, 2010-05-27 at 15:06 +0100, Matthew Garrett wrote:
> > one way which indicates to the scheduler that tasks in TASK_RUNNING 
> > should be scheduled, and when the session is idle we set the flag the 
> > other way and all processes in that cgroup get shifted to 
> > TASK_INTERRUPTIBLE or something.
> 
> What's wrong with simply making the phone beep loudly and displaying:
> bouncing cows is preventing your phone from sleeping!

Well, primarily that it's possible to design an implementation where it 
*doesn't* prevent your phone froms sleeping, but also because a given 
application may justifiably be preventing your phone from sleeping for a 
short while. What threshold do you use to determine the difference?

-- 
Matthew Garrett | mjg59@...f.ucam.org
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