From f0e3775f2e93dee4a3fa455631ea78acf6fd884f Mon Sep 17 00:00:00 2001
From: "Ricardo M. Correia" <rcorreia@wizy.org>
Date: Thu, 24 Apr 2014 14:03:18 +0200
Subject: [PATCH] linux: Add support for zram

---
 pkgs/os-specific/linux/kernel/common-config.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index db654fc0505c..02e361fde129 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -317,6 +317,12 @@ with stdenv.lib;
   TRANSPARENT_HUGEPAGE_ALWAYS? n
   TRANSPARENT_HUGEPAGE_MADVISE? y
 
+  # zram support (e.g for in-memory compressed swap)
+  ${optionalString (versionAtLeast version "3.4") ''
+    ZSMALLOC y
+  ''}
+  ZRAM m
+
   ${kernelPlatform.kernelExtraConfig or ""}
   ${extraConfig}
 ''