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In-Reply-To: <20100808160810.GA7968@srcf.ucam.org>
References: <alpine.DEB.2.00.1008051800360.25170@asgard.lang.hm>
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Date: Sun, 8 Aug 2010 20:08:33 +0300
Message-ID: <AANLkTik3FN5tTO8sgwz32b8s2SLnc8D1=14yU-a2betp@mail.gmail.com>
Subject: Re: Attempted summary of suspend-blockers LKML thread
From: Felipe Contreras <felipe.contreras@gmail.com>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: "Ted Ts'o" <tytso@mit.edu>, david@lang.hm,
        Mark Brown <broonie@opensource.wolfsonmicro.com>,
        "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
        Brian Swetland <swetland@google.com>,
        kevin granade <kevin.granade@gmail.com>,
        "Arve Hj?nnev?g" <arve@android.com>, "Rafael J. Wysocki" <rjw@sisk.pl>,
        Arjan van de Ven <arjan@infradead.org>,
        linux-pm@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
        pavel@ucw.cz, florian@mickler.org, stern@rowland.harvard.edu,
        peterz@infradead.org, tglx@linutronix.de, alan@lxorguk.ukuu.org.uk
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On Sun, Aug 8, 2010 at 7:08 PM, Matthew Garrett <mjg59@srcf.ucam.org> wrote:
> 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 writer can take a wakelock the whole time the application is
running (isn't that the typical case?), because perhaps the author
realizes that way the application works correctly, or he copy-pasted
it from somewhere else.

-- 
Felipe Contreras
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