linux_xanmod: Sync config with upstream

Author: ElXreno

pkgs/os-specific/linux/kernel/xanmod-kernels.nix

@@ -52,18 +52,26 @@ let
           CPU_FREQ_DEFAULT_GOV_PERFORMANCE = lib.mkOverride 60 yes;
           CPU_FREQ_DEFAULT_GOV_SCHEDUTIL = lib.mkOverride 60 no;
 
-          # Full preemption
-          PREEMPT = lib.mkOverride 60 yes;
+          # Lazy preemption
+          PREEMPT_LAZY = yes;
           PREEMPT_VOLUNTARY = lib.mkOverride 60 no;
+          PREEMPTIRQ_DELAY_TEST = unset;
 
           # Google's BBRv3 TCP congestion Control
           TCP_CONG_BBR = yes;
           DEFAULT_BBR = yes;
 
-          # Preemptive Full Tickless Kernel at 250Hz
+          # Preemptive tickless idle kernel
           HZ = freeform "250";
           HZ_250 = yes;
-          HZ_1000 = no;
+          NO_HZ = no;
+          NO_HZ_FULL = lib.mkOverride 60 no;
+          NO_HZ_IDLE = yes;
+
+          # CPU idle governors favored
+          CPU_IDLE_GOV_HALTPOLL = yes; # Already enabled
+          CPU_IDLE_GOV_LADDER = yes;
+          CPU_IDLE_GOV_TEO = yes;
 
           # RCU_BOOST and RCU_EXP_KTHREAD
           RCU_EXPERT = yes;
@@ -72,6 +80,12 @@ let
           RCU_BOOST = yes;
           RCU_BOOST_DELAY = freeform "0";
           RCU_EXP_KTHREAD = yes;
+          RCU_NOCB_CPU = yes;
+          RCU_DOUBLE_CHECK_CB_TIME = yes;
+
+          # x86 features
+          X86_FRED = yes;
+          X86_POSTED_MSI = yes;
         };
 
         extraPassthru.updateScript = {