02b568414d
We hit page allocation failures a lot at random for VM tests, in case of my own Hydra when it comes to the installer tests. The reason for this is that once the memory of the VM gets heavily fragmented the kernel is unable to allocate new pages. Setting vm.min_free_kbytes to 16MB forces the kernel to keep a minimum of 16 MB free. I've done some testing accross repeated runs of the installer tests with and without vm.min_free_kbytes set. So accross 30 test runs for each settings, all of the tests with the option being set passed while 14 tests without that sysctl option triggered page allocation failures. Sure, running 30 tests is not a guarantee that 16MB is enough, but we'll see how it turns out in the long run across all VM tests. Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Nixpkgs is a collection of packages for the Nix package manager. It is periodically built and tested by the hydra build daemon as so-called channels. To get channel information via git, add nixpkgs-channels as a remote:
% git remote add channels git://github.com/NixOS/nixpkgs-channels.git
For stability and maximum binary package support, it is recommended to maintain
custom changes on top of one of the channels, e.g. nixos-15.09 for the latest
release and nixos-unstable for the latest successful build of master:
% git remote update channels
% git rebase channels/nixos-15.09
For pull-requests, please rebase onto nixpkgs master.
NixOS linux distribution source code is located inside
nixos/ folder.
- NixOS installation instructions
- Documentation (Nix Expression Language chapter)
- Manual (How to write packages for Nix)
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- Nix Wiki
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- Continuous package builds for 15.09 release
- Tests for unstable/master
- Tests for 15.09 release
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