Hello nix-dev! If you're a Haskell user and run NixOS unstable or newer, by now you have probably seen the message:
"unable to decommit memory: Invalid argument" coming from GHC-built programs. The short version is, you need the latest Linux kernel; try with boot.kernelPackages = pkgs.linuxPackages_latest; in your configuration.nix. The long version of the story [1] is that Linux 4.5 added a feature present in other Unixy systems for some time (MADV_FREE). The NixOS default glibc is currently newer than that, so it advertises MADV_FREE and GHC will use it. But, the default kernel in NixOS is Linux 4.4 at the moment, where the MADV_FREE isn't supported. Hope this helps, Thomas [1]. https://ghc.haskell.org/trac/ghc/ticket/12495 _______________________________________________ nix-dev mailing list [email protected] http://lists.science.uu.nl/mailman/listinfo/nix-dev
