[GHC] #9539: TQueue can lead to thread starvation

[GHC]

#9539: TQueue can lead to thread starvation
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        Reporter:  jwlato            |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Core Libraries    |              Version:  7.8.2
      Resolution:                    |             Keywords:  stm
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by dfeuer):

 Working through this some more, I think we need

 1. A real-time queue, to prevent the starvation problem
 2. That allows `N` reads or writes to occur without contention.

 The simple scheduled real-time queue Okasaki describes won't do the trick,
 because both reads and writes inspect and modify the schedule each time.
 We need something a bit more flexible.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9539#comment:14>
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