#11746 HIGH 12.1.0: 12.1.0,, XO-1; kernel support for SDcards

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#11746: 12.1.0,, XO-1; kernel support for SDcards
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           Reporter:  mavrothal      |       Owner:  dsd                              
               Type:  defect         |      Status:  new                              
           Priority:  high           |   Milestone:  12.1.0                           
          Component:  kernel         |     Version:  Development build as of this date
         Resolution:                 |    Keywords:                                   
        Next_action:  test in build  |    Verified:  0                                
Deployment_affected:                 |   Blockedby:                                   
           Blocking:                 |  
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Comment(by greenfeld):

 In general a XO-1 with 12.1.0 os16 with an open file or directory handle
 on an external SD card's partition will fail to remount said partition
 after a suspend/resume cycle.  The XO-1 tries to do a full unmount/remount
 cycle on the external SD card's partition(s) and fails.

 The kernel will dump a backtrace complaining about trying to duplicate a
 resource, presumably trying to remount in the same place as the open file
 handle.  The swap partition case probably is just a variant of this.

 If no file handle is open on a external SD card's partition then the
 remount occurs successfully.

 A XO-1.5 can suspend and resume with an open file handle on the external
 SD card, and the XO-1.5 can also boot off of said external SD card.

 I do not know how to configure this build to boot off an external SD card
 for XO-1.

 Also see #11751, #11980.

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Ticket URL: <http://dev.laptop.org/ticket/11746#comment:14>
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