[GHC] #8189: Default to infinite stack size?

[GHC]

#8189: Default to infinite stack size?
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        Reporter:  nh2         |            Owner:
            Type:  bug         |           Status:  new
        Priority:  high        |        Milestone:  7.8.1
       Component:  Runtime     |          Version:  7.6.3
  System                       |         Keywords:
      Resolution:              |     Architecture:  Unknown/Multiple
Operating System:              |       Difficulty:  Easy (less than 1 hour)
  Unknown/Multiple             |       Blocked By:
 Type of failure:  Runtime     |  Related Tickets:
  crash                        |
       Test Case:              |
        Blocking:              |
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Comment (by bgamari):

 Oh dear; that is embarrassing. My intent here was more along the lines of,
 `if (total_allocated > RtsFlags.GcFlags.maxHeapSize)`. While it seems that
 the total allocations of each capability individually is pretty easy to
 come by (`cap->total_allocated`), it's not clear how to get the sum of
 these without iterating over all capabilities which seems a bit excessive
 in a warm allocation path. Either way, comparing against `req_blocks` was
 certainly a bit sloppy.

 Regarding the lack of default heap size limit, perhaps a solution here
 might be to set the default heap limit to some fraction (say 0.8) of the
 physical memory size. Admittedly determining this might be a bit platform
 specific but seeing as the RTS already knows how to get a core count it's
 not a great stretch.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8189#comment:17>
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