Alan Stern <[email protected]> writes:
> On Fri, 20 Jul 2007, Jeremy Maitin-Shepard wrote:
>> >> when doing a suspend-to-ram you get to a point where you just don't use
>> >> any userspace.
>>
>> > What do you mean? How can you prevent user tasks from running? That's
>> > basically what the freezer does, and the whole point of this approach
>> > is to eliminate the freezer. Right?
>>
>> Presumably no tasks at all would be scheduled.
> How would you prevent tasks from being scheduled? How would you
> prevent drivers from deadlocking because in order to put their device
> in a low-power state they need to acquire a lock which is held by a
> user task?
Perhaps this isn't an issue once the device is already quiesced. I'm
just conjecturing.
[snip]
--
Jeremy Maitin-Shepard
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