From 24b3a66f36805c95f08c57cda775e28bb9b2fcdf Mon Sep 17 00:00:00 2001
From: HikariKnight <2557889+HikariKnight@users.noreply.github.com>
Date: Fri, 13 Oct 2023 19:44:10 +0200
Subject: [PATCH] feat: enable automounting of hugepages with 1GB pagesize if
 the karg hugepagesz=1G is present (#425)

---
 Containerfile                                 |  1 +
 .../lib/systemd/system/dev-hugepages1G.mount  | 31 +++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 system_files/desktop/shared/usr/lib/systemd/system/dev-hugepages1G.mount

diff --git a/Containerfile b/Containerfile
index 40207e21..670234e6 100644
--- a/Containerfile
+++ b/Containerfile
@@ -283,6 +283,7 @@ RUN /tmp/image-info.sh && \
     systemctl enable ublue-update.timer && \
     systemctl enable bazzite-hardware-setup.service && \
     systemctl enable tailscaled.service && \
+    systemctl enable dev-hugepages1G.mount && \
     systemctl --global enable bazzite-user-setup.service && \
     if grep -q "kinoite" <<< "${BASE_IMAGE_NAME}"; then \
         sed -i '/^PRETTY_NAME/s/Kinoite/Bazzite/' /usr/lib/os-release && \
diff --git a/system_files/desktop/shared/usr/lib/systemd/system/dev-hugepages1G.mount b/system_files/desktop/shared/usr/lib/systemd/system/dev-hugepages1G.mount
new file mode 100644
index 00000000..5231ae10
--- /dev/null
+++ b/system_files/desktop/shared/usr/lib/systemd/system/dev-hugepages1G.mount
@@ -0,0 +1,31 @@
+#  This file is a modified version of dev-hugepages.mount from systemd.
+#
+#  With this unit file enabled you can set 1GB hugepages using kernel args
+#  and have them auto mounted, just as you would with 2MB hugepages.
+#
+#  For normal systems use "hugepagesz=1G hugepages=16"
+#  to allocate 16 hugepages with a pagesize of 1GB
+#  
+#  For systems with numa nodes use "hugepagesz=1G hugepages=0:16"
+#  to allocate 16 hugepages on numa node 0 with a pagesize of 1GB
+# 
+#  For more info, consult the kernel.org documentation linked in this file
+
+[Unit]
+Description=1GB Huge Pages File System
+Documentation=https://docs.kernel.org/admin-guide/mm/hugetlbpage.html
+Documentation=https://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
+ConditionPathExists=/sys/kernel/mm/hugepages
+DefaultDependencies=no
+ConditionCapability=CAP_SYS_ADMIN
+ConditionVirtualization=!private-users
+ConditionKernelCommandLine=hugepagesz=1G
+
+[Install]
+WantedBy=multi-user.target
+
+[Mount]
+What=hugetlbfs
+Where=/dev/hugepages1G
+Type=hugetlbfs
+Options=pagesize=1G