[HELP] Document: /sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size

[Ren Zhen]

Hi everybody,
       For  /sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size,
I execute the cmd '#cat  coherency_line_size',then it  return '64'.
       My OS is Ubuntu 12.04, CPU is intel core i3.
       Here is my problem, what is coherency_line_size ? what is its usage?
       Any help will be appreciated!
Sincerely,
Ren Zhen