From c3517a0f7f0c02cd634aa6147df97ea8cc08c816 Mon Sep 17 00:00:00 2001
From: GarandPLG <garandplg@garandplg.com>
Date: Sat, 14 Feb 2026 13:43:14 +0100
Subject: [PATCH] Add ZRAM module and enable it in core defaults

---
 modules/core/default.nix |  1 +
 modules/core/zram.nix    | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 modules/core/zram.nix

diff --git a/modules/core/default.nix b/modules/core/default.nix
index 573e210..ce782b5 100644
--- a/modules/core/default.nix
+++ b/modules/core/default.nix
@@ -26,6 +26,7 @@
     ./virtualbox.nix
     ./xdg.nix
     ./xserver.nix
+    ./zram.nix
     inputs.stylix.nixosModules.stylix
   ];
 }
diff --git a/modules/core/zram.nix b/modules/core/zram.nix
new file mode 100644
index 0000000..837339c
--- /dev/null
+++ b/modules/core/zram.nix
@@ -0,0 +1,32 @@
+{pkgs, ...}: {
+  zramSwap = {
+    enable = true;
+    priority = 5;
+    memoryMax = 16 * 1024 * 1024 * 1024;
+    algorithm = "zstd";
+    swapDevices = 1;
+    memoryPercent = 50;
+  };
+  boot = {
+    kernelParams = [
+      "zswap.enabled=1" # enables zswap
+      "zswap.compressor=zstd" # compression algorithm
+      "zswap.max_pool_percent=20" # maximum percentage of RAM that zswap is allowed to use
+      "zswap.shrinker_enabled=1" # whether to shrink the pool proactively on high memory pressure
+    ];
+    tmp = {
+      useZram = true;
+      zramSettings = {
+        compression-algorithm = "zstd";
+        zram-size = "ram * 0.5";
+        fs-type = "ext4";
+        options = "X-mount.mode=1777,discard";
+      };
+    };
+  };
+  services.zram-generator = {
+    enable = true;
+    package = pkgs.zram-generator;
+    settings = {};
+  };
+}