[Bugs] #4889 Sugar NORM: virtual memory leak in background control panel

[Sugar Labs Bugs]

#4889: virtual memory leak in background control panel
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  Reporter:  quozl   |            Owner:
      Type:  defect  |           Status:  new
  Priority:  Normal  |        Milestone:  Unspecified
 Component:  Sugar   |          Version:  Unspecified
  Severity:  Minor   |       Resolution:
  Keywords:          |  Distribution/OS:  OLPC
Bug Status:  New     |
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Comment (by quozl):

 * the leak of virtual memory in the background control panel reproduces on
 Ubuntu 14.04 on x86_64, and Sugar 0.107.0, at a rate of 145 kbyte/sec, and
 when graphed is a linear ramp,
  * a stress test of Icon shows no leak, VmSize is stable, (Hello World was
 used, see the replaced [http://dev.laptop.org/~quozl/z/1ZuC51.txt
 activity.py]),
  * increasing the number of icons in the test from 40 to 100 causes the
 VmSize to ramp up and down like a sawtooth wave as the LRU surface cache
 is overburdened; in icon.py it is set to 50 surfaces, and because the
 surfaces are different sizes in the test the result is expected,

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Ticket URL: <https://bugs.sugarlabs.org/ticket/4889#comment:6>
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