Index: linux-2.6.20-rc3/fs/fs-writeback.c
===================================================================
--- linux-2.6.20-rc3.orig/fs/fs-writeback.c	2007-01-05 14:51:00.000000000 -0600
+++ linux-2.6.20-rc3/fs/fs-writeback.c	2007-01-05 17:21:03.285870228 -0600
@@ -226,6 +226,7 @@ __sync_single_inode(struct inode *inode,
 			 */
 #ifdef CONFIG_CPUSETS
 			inode->i_mapping->dirty_nodes = NODE_MASK_NONE;
+			printk("mapping=%p clean inuse clear of dirty_nodes\n", inode->i_mapping);
 #endif
 			list_move(&inode->i_list, &inode_in_use);
 		} else {
@@ -234,6 +235,7 @@ __sync_single_inode(struct inode *inode,
 			 */
 #ifdef CONFIG_CPUSETS
 			inode->i_mapping->dirty_nodes = NODE_MASK_NONE;
+			printk("mapping=%p clean unused clear of dirty_nodes\n", inode->i_mapping);
 #endif
 			list_move(&inode->i_list, &inode_unused);
 		}
@@ -370,9 +372,15 @@ sync_sb_inodes(struct super_block *sb, s
 			break;
 
 #ifdef CONFIG_CPUSETS
-		if (wbc->in_cpuset && !nodes_intersects(mapping->dirty_nodes,
+		if (wbc->in_cpuset) {
+			printk(KERN_INFO "mapping=%p dirty_map=%lx allowed=%lx\n",
+				mapping, mapping->dirty_nodes.bits[0],
+				cpuset_current_mems_allowed.bits[0]);
+			if (!nodes_intersects(mapping->dirty_nodes,
 				cpuset_current_mems_allowed))
-			break;
+				break;
+			printk(KERN_INFO "inode has dirty nodes in cpuset\n");
+		}
 #endif
 		BUG_ON(inode->i_state & I_FREEING);
 		__iget(inode);
Index: linux-2.6.20-rc3/mm/page-writeback.c
===================================================================
--- linux-2.6.20-rc3.orig/mm/page-writeback.c	2007-01-05 15:29:30.000000000 -0600
+++ linux-2.6.20-rc3/mm/page-writeback.c	2007-01-05 17:18:32.494446824 -0600
@@ -198,6 +198,11 @@ get_dirty_limits(struct dirty_limits *dl
 	 * We should subtract the amount of mlocked pages but we do not have
 	 * any way to account for it.
 	 */
+	if (in_cpuset)
+		printk(KERN_INFO "dirty_limits: cpuset=%d nr_dirty=%ld nr_unstable=%ld nr_writeback=%ld "
+		"available_memory=%ld high_memory=%ld nr_mapped=%ld\n",
+		in_cpuset, dl->nr_dirty, dl->nr_unstable, dl->nr_writeback,
+		available_memory, high_memory, nr_mapped);
 
 	unmapped_ratio = 100 - (nr_mapped * 100) / available_memory;
 
@@ -221,6 +226,9 @@ get_dirty_limits(struct dirty_limits *dl
 	}
 	dl->thresh_background = background;
 	dl->thresh_dirty = dirty;
+	if (in_cpuset)
+		printk(KERN_INFO "thresh_background=%ld thresh_dirty=%ld\n",
+			dl->thresh_background, dl->thresh_dirty);
 	return in_cpuset;
 }
 
@@ -864,6 +872,8 @@ int fastcall set_page_dirty(struct page 
 #endif
 #ifdef CONFIG_CPUSETS
 		node_set(page_to_nid(page), mapping->dirty_nodes);
+		printk(KERN_INFO "set_page_dirty mapping=%p node=%d\n",
+			mapping, page_to_nid(page));
 #endif
 		return (*spd)(page);
 	}