[GHC] #10368: STM test failing on Armhf/Linux

[GHC]

#10368: STM test failing on Armhf/Linux
-------------------------------------+-------------------------------------
        Reporter:  erikd             |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  7.11
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:  arm
 Type of failure:  Incorrect result  |               Test Case:
  at runtime                         |
      Blocked By:                    |                Blocking:
 Related Tickets:  #7815             |  Differential Revisions:
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Comment (by fryguybob):

 Noting here, an easier way forward is to use the coarse-grain
 implementation instead and make sure that the lock acquire and release of
 the global lock are correct for ARM.  This should be good for a couple of
 cores.  Note that an important performance bug to fix would be the one
 addressed here:

 https://github.com/fryguybob/ghc/commit/6e1df4eac2c2806b87561c5d3876ba4b50e5af70

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10368#comment:5>
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