#11757 HIGH 11.3.1: /etc/adjtime in pristine corrupt in runin

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#11757: /etc/adjtime in pristine corrupt in runin
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           Reporter:  martin.langhoff        |       Owner:  martin.langhoff
               Type:  defect                 |      Status:  new            
           Priority:  high                   |   Milestone:  11.3.1         
          Component:  manufacturing process  |     Version:  not specified  
         Resolution:                         |    Keywords:                 
        Next_action:  diagnose               |    Verified:  0              
Deployment_affected:                         |   Blockedby:                 
           Blocking:                         |  
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Comment(by martin.langhoff):

 Thanks! My analysis is similar:

  * During startup, only one process is triggering rwtab mounts, and is
 clearly before (and not concurrent with) runin. There should be no race
 condition/
  * During shutdown, only /etc/init.d/halt unmounts, and is clearly after
 hwclock. hwclock doesn't seem for fork into background. The possibility
 remains that halt is called twice accidentally and races with itself --
 there is no flock to protect from this.
  * The affected unit I saw repro'd after 150 reboots, a random ramp unit
 went through 4400 reboots without hitting this. I want to lay my hands on
 an affected unit again :-)

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Ticket URL: <http://dev.laptop.org/ticket/11757#comment:4>
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