perf: increase global systemd NOFILE and MEMLOCK process limits

Author: dolfbarr

run_once_setup_fedora.sh

@@ -713,6 +713,17 @@ DNSSEC=yes
 EOF"
 $SUI_SUDO systemctl restart systemd-resolved
 
+# Configure systemd session limits (DefaultLimitNOFILE and DefaultLimitMEMLOCK)
+echo "Optimizing systemd user and system session limits..."
+$SUI_SUDO mkdir -p /etc/systemd/system.conf.d/ /etc/systemd/user.conf.d/
+$SUI_SUDO bash -c "cat <<'EOF' > /etc/systemd/system.conf.d/limits.conf
+[Manager]
+DefaultLimitNOFILE=1048576
+DefaultLimitMEMLOCK=infinity
+EOF"
+$SUI_SUDO cp /etc/systemd/system.conf.d/limits.conf /etc/systemd/user.conf.d/limits.conf
+$SUI_SUDO systemctl daemon-reexec 2>/dev/null || true
+
 # Btrfs Snapshot Rollbacks
 echo "Configuring Snapper and GRUB-Btrfs..."
 $SUI_SUDO dnf install -y snapper btrfs-assistant python3-dnf-plugin-snapper inotify-tools git make