Index: linux-2.6.15-rc1-mm2/mm/mempolicy.c
===================================================================
--- linux-2.6.15-rc1-mm2.orig/mm/mempolicy.c	2005-11-21 13:19:15.000000000 -0800
+++ linux-2.6.15-rc1-mm2/mm/mempolicy.c	2005-11-22 17:29:06.000000000 -0800
@@ -587,6 +587,7 @@ static int swap_pages(struct list_head *
  * Returns the number of page that could not be moved.
  */
 int do_migrate_pages(struct mm_struct *mm,
+	unsigned long start, unsigned long end,
 	const nodemask_t *from_nodes, const nodemask_t *to_nodes, int flags)
 {
 	LIST_HEAD(pagelist);
@@ -596,7 +597,7 @@ int do_migrate_pages(struct mm_struct *m
 	nodes_andnot(nodes, *from_nodes, *to_nodes);
 
 	down_read(&mm->mmap_sem);
-	check_range(mm, mm->mmap->vm_start, TASK_SIZE, &nodes,
+	check_range(mm, start, end, &nodes,
 			flags | MPOL_MF_DISCONTIG_OK, &pagelist);
 
 	if (!list_empty(&pagelist)) {
@@ -776,7 +777,9 @@ asmlinkage long sys_set_mempolicy(int mo
 /* Macro needed until Paul implements this function in kernel/cpusets.c */
 #define cpuset_mems_allowed(task) node_online_map
 
-asmlinkage long sys_migrate_pages(pid_t pid, unsigned long maxnode,
+asmlinkage long sys_migrate_pages(pid_t pid, 
+		unsigned long start, unsigned long end,
+		unsigned long maxnode,
 		const unsigned long __user *old_nodes,
 		const unsigned long __user *new_nodes)
 {
@@ -828,7 +831,10 @@ asmlinkage long sys_migrate_pages(pid_t 
 		goto out;
 	}
 
-	err = do_migrate_pages(mm, &old, &new, MPOL_MF_MOVE);
+	if (!end)
+		end = TASK_SIZE;
+
+	err = do_migrate_pages(mm, start, end, &old, &new, MPOL_MF_MOVE);
 out:
 	mmput(mm);
 	return err;
Index: linux-2.6.15-rc1-mm2/include/linux/mempolicy.h
===================================================================
--- linux-2.6.15-rc1-mm2.orig/include/linux/mempolicy.h	2005-11-21 13:17:58.000000000 -0800
+++ linux-2.6.15-rc1-mm2/include/linux/mempolicy.h	2005-11-22 17:28:23.000000000 -0800
@@ -153,6 +153,7 @@ extern struct zonelist *huge_zonelist(st
 extern unsigned slab_node(struct mempolicy *policy);
 
 int do_migrate_pages(struct mm_struct *mm,
+	unsigned long start, unsigned long end,
 	const nodemask_t *from_nodes, const nodemask_t *to_nodes, int flags);
 
 #else
Index: linux-2.6.15-rc1-mm2/kernel/cpuset.c
===================================================================
--- linux-2.6.15-rc1-mm2.orig/kernel/cpuset.c	2005-11-21 12:11:07.000000000 -0800
+++ linux-2.6.15-rc1-mm2/kernel/cpuset.c	2005-11-22 17:29:44.000000000 -0800
@@ -677,7 +677,7 @@ static void refresh_mems(void)
 		if (!nodes_equal(oldmem, current->mems_allowed)) {
 			numa_policy_rebind(&oldmem, &current->mems_allowed);
 			if (migrate) {
-				do_migrate_pages(current->mm, &oldmem,
+				do_migrate_pages(current->mm, 0, TASK_SIZE, &oldmem,
 					&current->mems_allowed,
 					MPOL_MF_MOVE_ALL);
 			}
@@ -1093,7 +1093,7 @@ static int attach_task(struct cpuset *cs
 
 	up(&callback_sem);
 	if (is_memory_migrate(cs))
-		do_migrate_pages(tsk->mm, &from, &to, MPOL_MF_MOVE_ALL);
+		do_migrate_pages(tsk->mm, 0, TASK_SIZE, &from, &to, MPOL_MF_MOVE_ALL);
 	put_task_struct(tsk);
 	if (atomic_dec_and_test(&oldcs->count))
 		check_for_release(oldcs, ppathbuf);