Merge pull request #3636 from gizmo98/compressed-memory

raspbiantools: Add option to enable compressed memory (ZRAM)

Author: joolswills

scriptmodules/supplementary/raspbiantools.sh

@@ -125,15 +125,46 @@ function enable_modules_raspbiantools() {
     done
 }
 
+function enable_zram_raspbiantools() {
+    if [[ "$__os_id" == "Raspbian" ]] || [[ "$__os_id" == "Debian" ]]; then
+        aptInstall zram-tools
+        # Use 50% of the current memory for ZRAM
+        local percent="50"
+        iniConfig "=" "" "/etc/default/zramswap"
+        # Raspbian Buster uses keyword PERCENTAGE
+        iniSet "PERCENTAGE" "$percent"
+        # Debian Bullseye/Bookworm use keyword PERCENT
+        iniSet "PERCENT" "$percent"
+        # Use zstd compression algorithm if kernel supports it
+        [[ -f /sys/class/block/zram0/comp_algorithm ]] && [[ "$(cat /sys/class/block/zram0/comp_algorithm)" == *zstd* ]] && iniSet "ALGO" "zstd"
+        service zramswap stop
+        service zramswap start
+    elif [[ "$__os_id" == "Ubuntu" ]]; then
+        aptInstall zram-config
+        # Ubuntu has a automatic zram configuration
+    fi
+}
+
+function disable_zram_raspbiantools() {
+    if [[ "$__os_id" == "Raspbian" ]] || [[ "$__os_id" == "Debian" ]]; then
+        apt remove -y zram-tools
+    elif [[ "$__os_id" == "Ubuntu" ]]; then
+        apt remove -y zram-config
+    fi
+}
+
 function gui_raspbiantools() {
     while true; do
+        local zram_status="Enable"
+        [[ $(cat /proc/swaps) == *zram* ]] && zram_status="Disable"
         local cmd=(dialog --backtitle "$__backtitle" --menu "Choose an option" 22 76 16)
         local options=(
             1 "Upgrade Raspbian packages"
             2 "Install Pixel desktop environment"
             3 "Remove some unneeded packages (pulseaudio / cups / wolfram)"
             4 "Disable screen blanker"
             5 "Enable needed kernel module uinput"
+            6 "$zram_status compressed memory (ZRAM)"
         )
         local choice=$("${cmd[@]}" "${options[@]}" 2>&1 >/dev/tty)
         if [[ -n "$choice" ]]; then
@@ -155,6 +186,9 @@ function gui_raspbiantools() {
                 5)
                     rp_callModule "$md_id" enable_modules
                     ;;
+                6)
+                    [[ "$zram_status" == "Enable" ]] && rp_callModule "$md_id" enable_zram || rp_callModule "$md_id" disable_zram
+                    ;;
             esac
         else
             break