#12661 NORM Not Tri: open firmware may hang if ext4 filesystem journal cannot be recovered

[Zarro Boogs per Child]

#12661: open firmware may hang if ext4 filesystem journal cannot be recovered
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           Reporter:  Quozl                |       Owner:  Quozl        
               Type:  defect               |      Status:  assigned     
           Priority:  normal               |   Milestone:  Not Triaged  
          Component:  ofw - open firmware  |     Version:  not specified
         Resolution:                       |    Keywords:               
        Next_action:  design               |    Verified:  0            
Deployment_affected:                       |   Blockedby:               
           Blocking:                       |  
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Comment(by Quozl):

 Reproduced on XO-1.5.

 The hang lasts for a variable time, but not forever.  It lasted for only 3
 seconds for a "sync" then power-removal test.  It lasted 48 seconds for an
 "apt-get update && apt-get install --yes apt-file && apt-file update" then
 power-removal test.  It may last longer on media that is slow.

 Once recovery from the journal is complete, the laptop boots as normal,
 and subsequent boots also work fine.  Journal size is 64MB according to
 dumpe2fs, so that would be a maximum.  If a larger journal is used,
 recovery time will be longer.

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Ticket URL: <http://dev.laptop.org/ticket/12661#comment:4>
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