Skip I/O scheduler optimization for Btrfs filesystems (openSUSE default)

lib/performance.sh

@@ -41,9 +41,13 @@ EOF
     # Apply kernel parameters
     sudo sysctl -p
     
-    # Optimize I/O scheduler for SSDs/HDDs
+    # Optimize I/O scheduler for SSDs/HDDs (skip for Btrfs filesystems)
+    local root_fs_type=$(findmnt -n -o fstype /)
+    if [[ "$root_fs_type" == "btrfs" ]]; then
+        log_info "Btrfs filesystem detected - skipping I/O scheduler optimization (Btrfs handles I/O optimization internally)"
+    else
         local disk_type=$(lsblk -d -o name,rota | awk 'NR>1 {if($2==0) print "ssd"; else print "hdd"; exit}')
-    local root_disk=$(lsblk -no pkname $(findmnt -n -o source /) | head -n1)
+        local root_disk=$(lsblk -no pkname $(findmnt -n -o source / | sed 's/\[.*\]//') | head -n1)
         
         if [[ -n "$root_disk" ]] && [[ -w "/sys/block/$root_disk/queue/scheduler" ]]; then
             if [[ "$disk_type" == "ssd" ]]; then
@@ -56,6 +60,7 @@ EOF
         else
             log_warning "Could not determine or access root disk scheduler. Skipping I/O optimization."
         fi
+    fi
     
     # Create performance monitoring script
     create_performance_monitor