[GHC] #650: Improve interaction between mutable arrays and GC

[GHC]

#650: Improve interaction between mutable arrays and GC
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  Reporter:  simonmar                 |          Owner:  simonmar        
      Type:  bug                      |         Status:  new             
  Priority:  normal                   |      Milestone:  6.14.1          
 Component:  Runtime System           |        Version:  6.4.1           
Resolution:                           |       Keywords:                  
Difficulty:  Difficult (2-5 days)     |             Os:  Unknown/Multiple
  Testcase:                           |   Architecture:  Unknown/Multiple
   Failure:  Runtime performance bug  |  
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Comment (by guest):

 Most of the time there won't be contention.

 How about using cmpxchg, and falling back to bts if there happened to be
 contention? Or would that also be much more expensive than byte
 operations?

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/650#comment:21>
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