#10445: Wrong stack space size when using -Ksize -------------------------------------+------------------------------------- Reporter: asr | Owner: Type: bug | Status: new Priority: normal | Milestone: 7.10.2 Component: Compiler | Version: 7.10.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: None/Unknown | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by archblob): * cc: simonmar (added) Comment: I think you are right about GHC 7.6.3 I can't see from the code how this worked then. I have a patch that validates but I'm not sure if it's the best approach, here it goes: In https://github.com/ghc/ghc/blob/master/rts/Threads.c#L589, it seems that when we allocate a new chunk, the `chunk_size` is always `RtsFlags.GcFlags.stkChunkSize` at a minimum even though alone or together with the old stack size this will be above the limit set by -K, so the fix is that if that limit is set we don't, because we know the max that we are allowed to allocate. Now what I don't know is if we should always allocate a minimum of `stkChunkSize` and why? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10445#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler