Index: linux-2.6.16-rc3/fs/proc/task_mmu.c
===================================================================
--- linux-2.6.16-rc3.orig/fs/proc/task_mmu.c	2006-02-12 16:27:25.000000000 -0800
+++ linux-2.6.16-rc3/fs/proc/task_mmu.c	2006-02-17 18:13:45.000000000 -0800
@@ -116,6 +116,7 @@ struct mem_size_stats
 	unsigned long shared_dirty;
 	unsigned long private_clean;
 	unsigned long private_dirty;
+	unsigned long page_dirty;
 };
 
 static int show_map_internal(struct seq_file *m, void *v, struct mem_size_stats *mss)
@@ -180,13 +181,15 @@ static int show_map_internal(struct seq_
 			   "Shared_Clean:  %8lu kB\n"
 			   "Shared_Dirty:  %8lu kB\n"
 			   "Private_Clean: %8lu kB\n"
-			   "Private_Dirty: %8lu kB\n",
+			   "Private_Dirty: %8lu kB\n"
+			   "Page_Dirty:    %8lu kB\n",
 			   (vma->vm_end - vma->vm_start) >> 10,
 			   mss->resident >> 10,
 			   mss->shared_clean  >> 10,
 			   mss->shared_dirty  >> 10,
 			   mss->private_clean >> 10,
-			   mss->private_dirty >> 10);
+			   mss->private_dirty >> 10,
+			   mss->page_dirty    >> 10);
 
 	if (m->count < m->size)  /* vma is copied successfully */
 		m->version = (vma != get_gate_vma(task))? vma->vm_start: 0;
@@ -230,6 +233,8 @@ static void smaps_pte_range(struct vm_ar
 			else
 				mss->private_clean += PAGE_SIZE;
 		}
+		if (PageDirty(page))
+				mss->page_dirty += PAGE_SIZE;
 	} while (pte++, addr += PAGE_SIZE, addr != end);
 	pte_unmap_unlock(pte - 1, ptl);
 	cond_resched();