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

#728: switch to compacting collection when swapping occurs
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    Reporter:  simonmar        |        Owner:                  
        Type:  task            |       Status:  new             
    Priority:  normal          |    Milestone:                  
   Component:  Runtime System  |      Version:  6.4.1           
    Severity:  normal          |     Keywords:                  
          Os:  Unknown         |   Difficulty:  Moderate (1 day)
Architecture:  Unknown         |  
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One avenue for tuning the GC to work better in low memory conditions is
 for it to auto-switch to compacting collection when swapping is happening.
 We can detect swapping using {{{getrusage()}}} on Unix systems.  See:

 [http://www.haskell.org//pipermail/glasgow-haskell-users/2006-
 March/009863.html]

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/728>
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