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Subject: Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8)
From: Peter Zijlstra <peterz@infradead.org>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
       Arve =?ISO-8859-1?Q?Hj=F8nnev=E5g?= <arve@android.com>,
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Date: Fri, 28 May 2010 17:18:44 +0200
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On Fri, 2010-05-28 at 10:35 -0400, Alan Stern wrote:
>         The app is busy doing something else unimportant
>         We do into power save
>         Push a button, generate an IRQ
>         Come out of power save
>         No app to poke
>         * System goes back to sleep and eventually wakes up again
>         The app finishes what it was doing
>         The app sees there is a keystroke and marks itself important
>         ...
> 
> The * step is where trouble can occur. 

Only because you don't run runnable tasks. Please stop considering that
an option and these problems go away.