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

[Peter Zijlstra]

On Thu, 2010-05-27 at 15:19 -0400, Alan Stern wrote:
> On Thu, 27 May 2010, Peter Zijlstra wrote:
> 
> > I still don't see how blocking applications will cause missed wakeups in
> > anything but a buggy application at worst, and even those will
> > eventually get the event when they unblock.
> > 
> > What seems to be the confusion?
> 
> During forced suspend, applications are block because they are frozen.
> 
> When an event occurs, the application is notified somehow.  But it 
> can't respond because it is frozen.  Hence the event remains sitting in 
> a kernel queue and the system goes ahead and suspends anyway.  The 
> application doesn't get thawed until the system wakes up at some 
> indefinite time in the future.

If the kernel is awake to put things in queues, we're clearly not
suspended and userspace is running ?!
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