How to get the number of free pages in a zone(2.6.18)?

[Adam Jiang <jiang.adam@xxxxxxxxx>]

Hello, list.

I want to backport mem_notify.patch to linux-2.6.18. Most of the things goes

well and simple, but a problem is in mem_notify.c there's a function named

mem_notify_poll() used the new zone_page_state() with NR_FREE_PAGES which is

not in 2.6.18. I just want to change the line to get free pages in a zone in

another way rather than patch the other headers in linux/. What should I do?

Is there a good method to get the number of free pages in 2.6.18? Any help

will be appreciate. Thanks you very much.

Best regards,

--
Adam Jiang
-☆-★-☆-★-☆-★-☆-★-☆-★-☆-★-☆-★-
e-mail:jiang.adam@xxxxxxxxx
http://www.adamjiang.com
-☆-★-☆-★-☆-★-☆-★-☆-★-☆-★-☆-★-