In the threaded RTS, on platforms without "timerfd" we could create a "ghc ticker" thread too and block the alarm signal in all threads except
#10840: Periodic alarm signals can cause a retry loop to get stuck -------------------------------------+------------------------------------- Reporter: Rufflewind | Owner: bgamari Type: bug | Status: new Priority: high | Milestone: 8.0.2 Component: Compiler | 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 hsyl20): Replying to [comment:16 hsyl20]: this one. I think this would fix the reported issue on OS X. Forget this idea, @simonmar told me that it won't work nicely with threads that don't belong to GHC. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10840#comment:17 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler