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Date: Sun, 8 Aug 2010 17:08:10 +0100
From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Felipe Contreras <felipe.contreras@gmail.com>
Cc: "Ted Ts'o" <tytso@mit.edu>, david@lang.hm,
        Mark Brown <broonie@opensource.wolfsonmicro.com>,
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Subject: Re: Attempted summary of suspend-blockers LKML thread
Message-ID: <20100808160810.GA7968@srcf.ucam.org>
References: <alpine.DEB.2.00.1008051800360.25170@asgard.lang.hm> <20100806123047.GE31326@sirena.org.uk> <20100806172226.GH2432@linux.vnet.ibm.com> <20100806173325.GA25367@rakim.wolfsonmicro.main> <20100806181832.GJ2432@linux.vnet.ibm.com> <alpine.DEB.2.00.1008061517130.30564@asgard.lang.hm> <20100807001431.GA3252@opensource.wolfsonmicro.com> <alpine.DEB.2.00.1008061741460.30564@asgard.lang.hm> <20100807062828.GB28087@thunk.org> <AANLkTinTfKRfAUJqggcK9Cgo9BTXfqMjJ2SXZS=D1bmT@mail.gmail.com>
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On Sun, Aug 08, 2010 at 04:35:13PM +0300, Felipe Contreras wrote:

> appropriately; that's not the case.
> 
> 1) Install a bad application that requests PM permissions and is granted those
> 
> In this case you've gained nothing with user-space suspend blockers.

It's clearly possible for a pathological Android application to destroy 
the power management policy. But to do that, the author would have to 
explicitly take a wakelock. That's difficult to do by accident. The 
various failure modes that exist in a non-wakelock world can be 
triggered in a wide variety of ways by accident. A sufficiently 
reductionist viewpoint will equate the two situations, but in the real 
world they're clearly different.

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