From bf0d71d7e5e866891260711a8236c8188366390f Mon Sep 17 00:00:00 2001
From: Ivan Malison <IvanMalison@gmail.com>
Date: Mon, 6 Jul 2026 18:28:26 -0700
Subject: [PATCH] nixos: add Memtest86+ GRUB boot entry

Enable boot.loader.grub.memtest86 so a Memtest86+ entry appears in the
GRUB menu, for diagnosing suspected DRAM bit-flips on this non-ECC box
(recurring RTS heap-corruption SIGSEGVs whose fault pattern looks like a
single-bit flip in an otherwise-valid pointer).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
---
 nixos/bootloaders/grub.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/nixos/bootloaders/grub.nix b/nixos/bootloaders/grub.nix
index bb8b070b..2e8db0f6 100644
--- a/nixos/bootloaders/grub.nix
+++ b/nixos/bootloaders/grub.nix
@@ -62,6 +62,7 @@ in {
 
       grub = {
         enable = true;
+        memtest86.enable = true;
         efiSupport = true;
         device = "nodev";
         useOSProber = cfg.windowsEfiUuid == null;