[GHC] #728: switch to compacting collection when swapping occurs

[GHC]

#728: switch to compacting collection when swapping occurs
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    Reporter:  simonmar          |        Owner:                  
        Type:  feature request   |       Status:  new             
    Priority:  normal            |    Milestone:  _|_             
   Component:  Runtime System    |      Version:  6.4.1           
    Severity:  major             |   Resolution:                  
    Keywords:  compacting        |   Difficulty:  Moderate (1 day)
    Testcase:  N/A               |           Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |  
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Changes (by PHO):

 * cc: pho at cielonegro.org (added)

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/728#comment:8>
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