#11075: Confusing parallel spark behaviour with safe FFI calls -------------------------------------+------------------------------------- Reporter: duncan | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Runtime System | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonmar): Oh, I actually implemented this a while ago as an experiment. I called it `foreign import "nonblocking"`, the idea is very simple: just release the capability but don't wake up another worker. It's not perfect, we could still get a worker woken up under some circumstances, but I bet it would help. I'll dig up the patch and see if we can get it in. Also, what on earth are you doing making FFI calls from sparks :-) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11075#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler