Dirty pages changes in linux-2.6

Dirty pages changes in linux-2.6

[manjunath k]

Hi,

 Ive been working on some of the proc filesystem
codes and found that the dirty pages list present in
the struct address_space is being removed from the
linux-2.6 kernel version by the patch

"stop-using-the-address_space-dirty_pages-list.patch"

@@ -327,7 +327,6 @@ struct address_space {
 	struct radix_tree_root	page_tree;	/* radix tree of all pages */
 	spinlock_t		tree_lock;	/* and spinlock protecting it */
 	struct list_head	clean_pages;	/* list of clean pages */
-	struct list_head	dirty_pages;	/* list of dirty pages */
 	struct list_head	locked_pages;	/* list of locked pages */
 	struct list_head	io_pages;	/* being prepared for I/O */
 	unsigned long		nrpages;	/* number of total pages */

And ive also noticed that the /proc/pid/statm output displays
the dirty page count as 0.
Eg :
cat /proc/self/statm
1207 100 833 3 0 371 0

My perception is that it is because of the changes in the above mentioned
patch the dirty page count is 0 in linux-2.6.

Please give me some information regarding the same.

-Thanks

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