linux-kernel - Re: Attempted summary of suspend-blockers LKML thread, take three

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Message-ID: <AANLkTimahmGikeai8QnAxCy45deT00-6T7h-eA-NqL4G@mail.gmail.com>
Date:	Thu, 12 Aug 2010 03:28:00 +0300
From:	Felipe Contreras <felipe.contreras@...il.com>
To:	paulmck@...ux.vnet.ibm.com
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, "Ted Ts'o" <tytso@....edu>,
	david@...g.hm, Brian Swetland <swetland@...gle.com>,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	arve@...roid.com, mjg59@...f.ucam.org, pavel@....cz,
	florian@...kler.org, rjw@...k.pl, stern@...land.harvard.edu,
	peterz@...radead.org, tglx@...utronix.de, menage@...gle.com,
	david-b@...bell.net, James.Bottomley@...e.de, arjan@...radead.org,
	swmike@....pp.se, galibert@...ox.com, dipankar@...ibm.com
Subject: Re: Attempted summary of suspend-blockers LKML thread, take three

On Thu, Aug 12, 2010 at 1:28 AM, Paul E. McKenney
<paulmck@...ux.vnet.ibm.com> wrote:
> On Wed, Aug 11, 2010 at 10:18:51PM +0300, Felipe Contreras wrote:
>> On Mon, Aug 9, 2010 at 9:16 PM, Paul E. McKenney
>> <paulmck@...ux.vnet.ibm.com> wrote:
>> > But wouldn't an office suite run as a power-oblivious application on an
>> > Android device?  After all, office applications do not need to run when
>> > the screen is turned off, so these the applications do not need to use
>> > suspend blockers.
>>
>> Ideally the system would be suspended even when the screen is on. If
>> there are no "trusted" applications running at the same time, then
>> openoffice wouldn't load at all. Right?
>
> My understanding is that Android systems in fact do not suspend when
> the screen is on, and that most (perhaps all) other systems do not
> opportunistically suspend at all.  There has been some speculation about
> what a hypothetical Android having a non-volatile display might do,
> but as far as I know, this is just speculation.

I have a desktop system in mind. If opportunistic suspend is only
triggered when the display is off, then it's no good for normal usage,
and therefore dynamic PC needs to get its act together... specially
for laptops.

-- 
Felipe Contreras
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