btrfs fixes

nixos/configuration.nix

@@ -36,7 +36,7 @@
       "atkbd.softrepeat=1"                   # Software key repeat
       "amd_pstate=active"                    # Use AMD P-State driver for better power management
       "amd_pstate.shared_mem=1"
-      "pcie_aspm.policy=powersupersave"      # Aggressive PCIe power management
+      # "pcie_aspm.policy=powersupersave"      # Aggressive PCIe power management
       "amdgpu.gpu_recovery=1"                # Enable automatic GPU recovery
       "amdgpu.runpm=0"                      # Disable runtime PM (major hang cause)
       ###"amdgpu.dcdebugmask=0x400" 
@@ -48,22 +48,23 @@
   systemd.tpm2.enable = false;
   boot.initrd.systemd.tpm2.enable = false;
 
-  #swapDevices = [{ file = "/swap/swapfile"; }];
+  # Enable swap file
+  swapDevices = [{ device = "/swap/swapfile"; }];
 
   # Override btrfs mount options from hardware-configuration.nix
   fileSystems."/" = {
     options = [ "subvol=@" "compress=zstd" "space_cache=v2" "noatime"
-  "autodefrag" "ssd" "discard=async" ];
+  "lazytime" "ssd" "discard=async" ];
   };
 
   fileSystems."/home" = {
     options = [ "subvol=@home" "compress=zstd" "space_cache=v2" "noatime"
-   "autodefrag" "ssd" "discard=async" ];
+   "lazytime" "ssd" "discard=async" ];
   };
 
   fileSystems."/var/log" = {
     options = [ "subvol=@log" "compress=zstd" "space_cache=v2" "noatime"
-  "autodefrag" "ssd" "discard=async" ];
+  "lazytime" "ssd" "discard=async" ];
   };
 
   fileSystems."/swap" = {
@@ -83,8 +84,13 @@
   # Trust the Tailscale interface
   networking.firewall.trustedInterfaces = [ "tailscale0" ];
 
-  # Disable reverse path filtering for Tailscale
-  boot.kernel.sysctl."net.ipv4.conf.tailscale0.rp_filter" = 0; 
+  # Disable reverse path filtering for Tailscale, change kernel writeback options
+  boot.kernel.sysctl = {
+    "net.ipv4.conf.tailscale0.rp_filter" = 0;
+    "vm.dirty_ratio" = 10;
+    "vm.dirty_background_ratio" = 5;
+    "vm.swappiness" = 10;
+  };
 
   # Enable resolved
   services.resolved.enable = true;
@@ -282,7 +288,6 @@
 
   # Enable Docker
   virtualisation.docker.enable = true;
-  virtualisation.docker.storageDriver = "btrfs";
 
   nixpkgs.config.allowUnfree = true;
   nix.settings.experimental-features = [ "nix-command" "flakes" ];