[GHC] #9519: Add a way to mask thread preemption via fired timer for a computation

[GHC]

#9519: Add a way to mask thread preemption via fired timer for a computation
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              Reporter:  abbradar    |            Owner:  simonmar
                  Type:  feature     |           Status:  infoneeded
  request                            |        Milestone:
              Priority:  normal      |          Version:  7.8.2
             Component:  Runtime     |         Keywords:
  System                             |     Architecture:  Unknown/Multiple
            Resolution:              |       Difficulty:  Unknown
      Operating System:              |       Blocked By:
  Unknown/Multiple                   |  Related Tickets:
       Type of failure:              |
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Changes (by simonmar):

 * status:  new => infoneeded


Comment:

 I doubt that this would be easily implementable, the RTS assumes that
 worker threads are interchangeable and I think it would be difficult (and
 error-prone) to change that assumption.  The right way to deal with
 thread-local state is to use a bound thread (`forkOS`).  Is that a
 problem?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9519#comment:1>
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