[GHC] #9706: New block-structured heap organization for 64-bit

[GHC]

#9706: New block-structured heap organization for 64-bit
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              Reporter:  ezyang      |            Owner:  simonmar
                  Type:  task        |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Runtime     |          Version:  7.8.3
  System                             |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by refold):

 Replying to [comment:2 simonmar]:
 >  * Windows doesn't overcommit, so we can't do this on Windows

 From [http://msdn.microsoft.com/en-
 us/library/windows/desktop/aa366887%28v=vs.85%29.aspx the documentation
 for VirtualAlloc] it seems like it's possible to first reserve a memory
 range with `MEM_RESERVE` and then commit it as needed with `MEM_COMMIT`.
 [http://blogs.technet.com/b/markrussinovich/archive/2008/11/17/3155406.aspx
 This article] confirms it.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9706#comment:3>
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