docs: def _memdata(osdata):
      '''
      Gather information about the system memory
      '''
      # Provides:
      #   mem_total
      #   swap_total, for supported systems.
      grains = {'mem_total': 0}
      if osdata['kernel'] == 'Linux':
          grains.update(_linux_memdata())
      elif osdata['kernel'] in ('FreeBSD', 'OpenBSD', 'NetBSD'):
          grains.update(_bsd_memdata(osdata))
      elif osdata['kernel'] == 'Darwin':
          grains.update(_osx_memdata())
      elif osdata['kernel'] == 'SunOS':
          grains.update(_sunos_memdata())
      elif osdata['kernel'] == 'AIX':
          grains.update(_aix_memdata())
      elif osdata['kernel'] == 'Windows' and HAS_WMI:
          grains.update(_windows_memdata())
      return grains