#12038 NORM 12.1.0: XO-1.5 suspend: Freezing of tasks aborted

[Zarro Boogs per Child]

#12038: XO-1.5 suspend: Freezing of tasks aborted
--------------------------------+-------------------------------------------
           Reporter:  dsd       |       Owner:  dsd          
               Type:  defect    |      Status:  new          
           Priority:  normal    |   Milestone:  12.1.0       
          Component:  kernel    |     Version:  not specified
         Resolution:            |    Keywords:               
        Next_action:  diagnose  |    Verified:  0            
Deployment_affected:            |   Blockedby:               
           Blocking:            |  
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Comment(by dsd):

 With some debugging we find this is coming from 00:06 (the RTC), e.g.

 {{{
 [ 1466.039083] !! got wakeup event going into suspend: 00:06
 [ 1466.040017] !!__ got wakeup event going into suspend: 00:06
 [ 1470.869621] PM: Syncing filesystems ...
 [ 1471.403818] done.
 [ 1471.405819] Freezing user space processes ...
 [ 1471.411273] Freezing of tasks aborted after 0.00 seconds (30 tasks
 refusing to freeze, wq_busy=0):
 }}}

 The strange thing here is that the 1466 messages are only emitted when a
 flag is set, and this flag is set right above the printk for "Syncing
 filesystems" which only gets printed about 4 seconds later.

 So things might be going to plan here: perhaps the system is under so much
 load that it takes over 10 seconds to reach the suspend point. In this
 case its good that we didn't sleep because then we would have missed the
 wakeup. Next step will be adding some logging in runin-sus to confirm this
 suspicion.

-- 
Ticket URL: <http://dev.laptop.org/ticket/12038#comment:1>
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