[GHC] #7127: RTS timer gets turned off when using +RTS -I0

[GHC]

#7127: RTS timer gets turned off when using +RTS -I0
---------------------------------+------------------------------------------
    Reporter:  simonmar          |       Owner:  simonmar        
        Type:  bug               |      Status:  new             
    Priority:  high              |   Milestone:  7.6.1           
   Component:  Runtime System    |     Version:  7.4.2           
    Keywords:                    |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
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 This bug was reported to me by `hvr` on IRC.  I fixed it in GHC yesterday,
 but we still need a test, and we could potentially merge this to the 7.4
 and 7.6 branches:

 commit 396f09031b363bf2f0d2afa28a86e67a0628a696
 {{{
 Author: Simon Marlow <marlowsd at gmail.com>
 Date:   Tue Aug 7 14:44:46 2012 +0100

     Fix a bug in the handling of recent_activity

     The problem occurred when the idle GC was turned off with +RTS -I0.
     Then the scheduler would go into the state ACTIVITY_DONE_GC directly
     without doing a GC, and a subsequent GC would put it back to
     ACTIVITY_YES but without turning the timer back on.  Instead if the GC
     finds the state is ACTIVITY_DONE_GC it should leave it there.
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7127>
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