From 0accf880d6ee22d14df0985131d38824d48d377e Mon Sep 17 00:00:00 2001
From: Aminda Suomalainen <suomalainen@aminda.eu>
Date: Thu, 2 Apr 2026 22:10:37 +0300
Subject: [PATCH] etc: note Arch wiki gaming so I remember them in the future
 on Steam Deck

---
 etc/sysctl.d/80-gamecompatibility.conf        |  2 ++
 etc/tmpfiles.d/.gitignore                     |  2 ++
 .../consistent-response-time-for-gaming.conf  | 20 +++++++++++++++++++
 3 files changed, 24 insertions(+)
 create mode 100644 etc/sysctl.d/80-gamecompatibility.conf
 create mode 100644 etc/tmpfiles.d/.gitignore
 create mode 100644 etc/tmpfiles.d/consistent-response-time-for-gaming.conf

diff --git a/etc/sysctl.d/80-gamecompatibility.conf b/etc/sysctl.d/80-gamecompatibility.conf
new file mode 100644
index 00000000..6c27e8fd
--- /dev/null
+++ b/etc/sysctl.d/80-gamecompatibility.conf
@@ -0,0 +1,2 @@
+# wiki.archlinux.org/title/Gaming#Increase_vm.max_map_count
+vm.max_map_count = 2147483642
diff --git a/etc/tmpfiles.d/.gitignore b/etc/tmpfiles.d/.gitignore
new file mode 100644
index 00000000..502aad1d
--- /dev/null
+++ b/etc/tmpfiles.d/.gitignore
@@ -0,0 +1,2 @@
+# Generated by a script containing UIDs, so not useful here.
+btrfs-enable-dynamic-periodic-reclaim.conf
diff --git a/etc/tmpfiles.d/consistent-response-time-for-gaming.conf b/etc/tmpfiles.d/consistent-response-time-for-gaming.conf
new file mode 100644
index 00000000..bd209eb0
--- /dev/null
+++ b/etc/tmpfiles.d/consistent-response-time-for-gaming.conf
@@ -0,0 +1,20 @@
+# https://wiki.archlinux.org/title/Gaming#Make_the_changes_permanent
+#    Path                  Mode UID  GID  Age Argument
+w /proc/sys/vm/compaction_proactiveness - - - - 0
+w /proc/sys/vm/watermark_boost_factor - - - - 1
+w /proc/sys/vm/min_free_kbytes - - - - 1048576
+w /proc/sys/vm/watermark_scale_factor - - - - 500
+w /proc/sys/vm/swappiness - - - - 10
+w /sys/kernel/mm/lru_gen/enabled - - - - 5
+w /proc/sys/vm/zone_reclaim_mode - - - - 0
+w /sys/kernel/mm/transparent_hugepage/enabled - - - - madvise
+w /sys/kernel/mm/transparent_hugepage/shmem_enabled - - - - advise
+w /sys/kernel/mm/transparent_hugepage/defrag - - - - never
+w /proc/sys/vm/page_lock_unfairness - - - - 1
+w /proc/sys/kernel/sched_child_runs_first - - - - 0
+w /proc/sys/kernel/sched_autogroup_enabled - - - - 1
+w /proc/sys/kernel/sched_cfs_bandwidth_slice_us - - - - 3000
+w /sys/kernel/debug/sched/base_slice_ns  - - - - 3000000
+w /sys/kernel/debug/sched/migration_cost_ns - - - - 500000
+w /sys/kernel/debug/sched/nr_migrate - - - - 8
+