Add files via upload

modules/zram.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+# zram.sh - Configure compressed swap in RAM
+
+install_zram() {
+    echo -e "${YELLOW}ZRAM Configuration${NC}"
+
+    if [ -z "$RAM_KB" ] || [ "$RAM_KB" -eq 0 ]; then
+        echo -e "${RED}Could not determine RAM size. Aborting.${NC}"
+        return 1
+    fi
+
+    local half_ram_mb=$((RAM_KB / 2 / 1024))
+
+    local algo
+    algo=$(whiptail --title "ZRAM Compression" --menu \
+        "ZRAM compresses a portion of RAM to use as\nswap, effectively increasing available memory.\n\nChoose the compression algorithm:\n\nlz4:  Very fast, low CPU usage. Minimal latency.\n      Recommended for most users.\n\nzstd: Better compression ratio (10-20% more),\n      slightly higher CPU usage.\n\nPress Cancel to abort." \
+        18 65 2 \
+        "lz4"  "Fastest, lowest CPU usage (recommended)" \
+        "zstd" "Best ratio, slightly more CPU" \
+        3>&1 1>&2 2>&3)
+
+    if [ -z "$algo" ]; then
+        echo "ZRAM configuration cancelled."
+        return 0
+    fi
+
+    local zram_size
+    if whiptail --title "ZRAM Size" --yesno \
+        "Use 50% of RAM for ZRAM? (${half_ram_mb} MB out of ${RAM_SUMMARY})\n\nChoose No to enter a custom size." 10 60; then
+        zram_size=$half_ram_mb
+    else
+        zram_size=$(whiptail --title "ZRAM Size" --inputbox \
+            "Enter ZRAM size in MB:" 8 60 "$half_ram_mb" 3>&1 1>&2 2>&3)
+        if [ -z "$zram_size" ] || ! [[ "$zram_size" =~ ^[0-9]+$ ]]; then
+            echo "ZRAM configuration cancelled."
+            return 0
+        fi
+    fi
+
+    if ! whiptail --title "ZRAM Summary" --yesno \
+        "Algorithm:  ${algo}\nSize:       ${zram_size} MB (${RAM_SUMMARY} total)\nPriority:   100\n\nApply ZRAM configuration?" 13 60; then
+        echo "ZRAM configuration cancelled."
+        return 0
+    fi
+
+    echo -e "${YELLOW}Installing zram-tools...${NC}"
+    sudo apt install -y zram-tools
+
+    echo "Writing configuration..."
+    sudo tee /etc/default/zramswap > /dev/null <<EOF
+ALGO=$algo
+SIZE=$zram_size
+PRIORITY=100
+EOF
+
+    echo "Restarting zramswap service..."
+    sudo systemctl restart zramswap
+
+    echo ""
+    echo -e "${GREEN}ZRAM configured successfully.${NC}"
+    echo ""
+    sudo zramctl
+    echo ""
+    echo -e "${GREEN}You can verify with: sudo zramctl${NC}"
+}