Commit 8d3fe232 authored by Adrian Pistol's avatar Adrian Pistol
Browse files

linux: Set CONFIG_NO_HZ_FULL=y. 

CONFIG_NO_HZ_FULL=y should be set to enable the `nohz_full=` and
`rcu_nocbs=` options. These carry no additional performance penalty
compared to CONFIG_NO_HZ_IDLE and behaves like it by default,
but allows disabling the tick interrupts on cores for power or
performance reasons.

[Debian][1] also applied the change to all their kernels.
Like the Kernel says: "If you're a distro say Y."

[1]: https://salsa.debian.org/kernel-team/linux/-/commit/f6aad27f05c007d6f30b34ff77bc7ea47844f117
parent 575bb5a4

pkgs/os-specific/linux/kernel/common-config.nix

+6 −0
Original line number Diff line number Diff line
@@ -114,6 +114,12 @@ let 
      IOSCHED_BFQ = whenAtLeast "4.12" module;

    };





    timer = {

      # Enable Full Dynticks System.

      NO_HZ_FULL = yes;

    };



    # Enable NUMA.

    numa = {

      NUMA  = option yes;