linux-kernel - Re: [PATCH 0/8] Suspend block api (version 6)

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Date:	Tue, 11 May 2010 17:45:54 +0100
From:	Matthew Garrett <mjg@...hat.com>
To:	Tony Lindgren <tony@...mide.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Kevin Hilman <khilman@...prootsystems.com>,
	Arve Hjønnevåg <arve@...roid.com>,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	Alan Stern <stern@...land.harvard.edu>,
	Tejun Heo <tj@...nel.org>, Oleg Nesterov <oleg@...hat.com>,
	Paul Walmsley <paul@...an.com>, magnus.damm@...il.com,
	mark gross <mgross@...ux.intel.com>,
	Arjan van de Ven <arjan@...radead.org>,
	Geoff Smith <geoffx.smith@...el.com>,
	Brian Swetland <swetland@...gle.com>
Subject: Re: [PATCH 0/8] Suspend block api (version 6)

On Tue, May 11, 2010 at 09:36:33AM -0700, Tony Lindgren wrote:
> OK, so can the suspend blocker then become just:
> 
> # Block suspend while idle, system stays running
> # echo default > /sys/power/policy
> 
> and the when it's OK to suspend:
> 
> # Allow suspend while idle, system suspends when it hits kernel idle loop
> # echo opportunistic > /sys/power/policy
> 
> or do you still need something more to ensure the data gets into your
> app and be handled?

Yes. You still need suspend blocks.

> The part I really don't like is the idea of patching all over the drivers
> and userspace for the wakelocks/suspendblocks.

I don't like the idea either, but given that nobody has actually 
provided any other ideas that would actually work then I don't think 
we've got a great deal of choice.

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