#7458 BLOC 8.2.0 (: Intermitent suspend/resume lockup

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#7458: Intermitent suspend/resume lockup
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   Reporter:  dsaxena       |       Owner:  dsaxena                          
       Type:  defect        |      Status:  assigned                         
   Priority:  blocker       |   Milestone:  8.2.0 (was Update.2)             
  Component:  not assigned  |     Version:  Development build as of this date
 Resolution:                |    Keywords:  joyride-2131:-                   
Next_action:  diagnose      |    Verified:  0                                
  Blockedby:                |    Blocking:  7393                             
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Comment(by dsaxena):

 Replying to [comment:28 rsmith]:
 > oops2.log is another oops.  I stopped the log since the kernel appeared
 to be in runaway oops mode.  Eventually it did recover.
 >
 > I do see timeouts in the log but nothing in my EC log indicates anything
 is wrong.  Currently I'm very suspect of the fact that the timestamp on
 the printk does not increase between ec commands. That's something I've
 not see in prior kernels.

 Investigating the timestamp oddness and the way that printk() is getting
 timestamps has changed from 2.6.22 to 2.6.25. In 2.6.22 we just read the
 TSC and used that for the printk() time whereas in the new kernel we're
 doing calling a wrapper function (__update_rq_clock) that does some range
 checking. Looking at this wrapper, I believe it may be possible to end up
 with duplicate timestamps when coming out of resume, but I need to add
 some debug prints and dig a bit more into the timer code to validate.

 I doubt that this is related to EC timeouts, but will test to rule it out
 for sure as we've got too many variables we're dealing with in this bug
 and I need to narrow down what to look at.

-- 
Ticket URL: <http://dev.laptop.org/ticket/7458#comment:29>
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