[GHC] #10017: signal handlers are invoked multiple times when the threaded rts is used

[GHC]

#10017: signal handlers are invoked multiple times when the threaded rts is used
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        Reporter:  redneb            |                   Owner:  simonmar
            Type:  bug               |                  Status:  new
        Priority:  highest           |               Milestone:  7.10.1
       Component:  Runtime System    |                 Version:  7.10.1-rc1
      Resolution:                    |                Keywords:
Operating System:  Linux             |            Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:  #9423             |  Differential Revisions:
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Comment (by AndreasVoellmy):

 I'm still getting up to speed, but it looks like that offending loop in
 `generic_handler` should just be removed. We have to signal to all the
 control pipes in `ioManagerDie()` (to solve the issue that led to that
 commit), but not in `generic_handler` (it seems). I'll look into it a bit
 more to check my understand and run some tests.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10017#comment:2>
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