#12781 HIGH 13.2.0-: XO-4 Android performance regression on 1GB units

Zarro Boogs per Child bugtracker at laptop.org
Wed May 21 03:59:26 EDT 2014

#12781: XO-4 Android performance regression on 1GB units
           Reporter:  Quozl    |       Owner:  Quozl                            
               Type:  defect   |      Status:  new                              
           Priority:  high     |   Milestone:  13.2.0-android                   
          Component:  android  |     Version:  Development build as of this date
         Resolution:           |    Keywords:                                   
        Next_action:  design   |    Verified:  0                                
Deployment_affected:           |   Blockedby:                                   
           Blocking:           |  
Changes (by Quozl):

  * next_action:  diagnose => design


 A test kernel with the above diagnostic patches is available:
  * [http://dev.laptop.org/~quozl/12781/a/ test kernel].

 Usage: on a USB drive, copy the vmlinuz file onto the USB drive, make a
 folder boot, copy the olpc.fth file into the boot folder, boot the XO-4
 1GB from the USB drive.

 This kernel disables network access because of a build problem which is
 being worked on.


 Per Jon Nettleton, the alloc_contig_range messages are a bug in CMA during
 page migration, and the relevant patch hashes to cherry-pick include
 c060f943d09, 7c45512df9, bb13ffeb9 and 627260595.

Ticket URL: <http://dev.laptop.org/ticket/12781#comment:3>
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