boot.rb

...

# including fix manualy, becouse loading lib/**/*.rb happends in Padrino.load!
require "lib/reloader_fix"
Padrino::Reloader::Stat.skip_folders = %W{photos utilites vertex-lib importers}

Padrino.load!

reloader_fix.rb

module Padrino
  module Reloader
    module Stat
      class << self
        
        # this fix skips [public log tmp] folders and allow to skip folders what you pass in
        # Padrino::Reloader::Stat.skip_folders = [folders]
        
        # this line
        attr_accessor :skip_folders
        
        def rotation
          paths = Dir[Padrino.root("*")].unshift(Padrino.root).reject { |path| !File.directory?(path) }
          
          # and this 2 lines
          @skip_folders = Array(@skip_folders) | %W{public log tmp}
          paths -= @skip_folders.map {|folder| Padrino.root(folder) }
          
          files = paths.map { |path| Dir["#{path}/**/*.rb"] }.flatten

          files.map{ |file|
            next if Padrino::Reloader.exclude.any? { |base| file =~ /^#{base}/ }

            found, stat = figure_path(file, paths)
            next unless found && stat && mtime = stat.mtime

            CACHE[file] = found

            yield(found, mtime)
          }.compact
        end
      end
    end
  end
end