From 17f18f4fd578c68c2feff493c873b853acaed639 Mon Sep 17 00:00:00 2001
From: Yarny0 <41838844+Yarny0@users.noreply.github.com>
Date: Sat, 20 Dec 2025 16:13:31 +0100
Subject: [PATCH] virtualbox: patch high cpu usage with NAT networking

https://github.com/VirtualBox/virtualbox/issues/356
---
 pkgs/applications/virtualization/virtualbox/default.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkgs/applications/virtualization/virtualbox/default.nix b/pkgs/applications/virtualization/virtualbox/default.nix
index 108a7f3de00e..6df788ff7567 100644
--- a/pkgs/applications/virtualization/virtualbox/default.nix
+++ b/pkgs/applications/virtualization/virtualbox/default.nix
@@ -231,6 +231,14 @@ stdenv.mkDerivation (finalAttrs: {
         url = "https://salsa.debian.org/pkg-virtualbox-team/virtualbox/-/raw/8028d88e6876ca5977de13c58b54e243229efe98/debian/patches/16-no-update.patch";
         hash = "sha256-AGtFsRjwd8Yw296eqX3NC2TUptAhpFTRaOMutiheQ6Y=";
       })
+      # NAT network shouldn't fully saturate one CPU
+      # https://github.com/VirtualBox/virtualbox/issues/356
+      (fetchpatch {
+        name = "vbox-nat-cpu.patch";
+        url = "https://github.com/VirtualBox/virtualbox/commit/efa378dadd192af8fbce331e9ec66fb36d65ad3d.diff";
+        hash = "sha256-7u3kSszv77leZdMs911TzAchU5mBqmNpgvuZDQaY9To=";
+        hunks = [ "2-" ];
+      })
     ]
     ++ [ ./extra_symbols.patch ]
     # When hardening is enabled, we cannot use wrapQtApp to ensure that VirtualBoxVM sees