[GHC] #9075: Per-thread weak pointer list (remove global lock on mkWeak#)

[GHC]

#9075: Per-thread weak pointer list (remove global lock on mkWeak#)
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        Reporter:  ezyang                   |            Owner:  ezyang
            Type:  bug                      |           Status:  merge
        Priority:  low                      |        Milestone:
       Component:  Runtime System           |          Version:  7.9
      Resolution:                           |         Keywords:  easy
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  Runtime performance bug  |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
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Changes (by ezyang):

 * status:  new => merge


Comment:

 (The bug was collectFreshWeakPtrs was being called too late, after some
 scavenging had occurred).

 I am indifferent to whether or not this feature goes in 7.8 stable, but
 maybe someone else wants to lobby for it, so I'll leave it as merge for
 now.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9075#comment:7>
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