Index: linux-2.6.16-mm2/mm/mmap.c
===================================================================
--- linux-2.6.16-mm2.orig/mm/mmap.c	2006-03-29 19:20:13.000000000 -0800
+++ linux-2.6.16-mm2/mm/mmap.c	2006-03-29 19:20:28.000000000 -0800
@@ -930,6 +930,11 @@ unsigned long do_mmap_pgoff(struct file 
 			return -EPERM;
 		vm_flags |= VM_LOCKED;
 	}
+	if (flags & MAP_DONTMOVE) {
+		if (!can_do_mlock())
+			return -EPERM;
+		vm_flags |= VM_DONTMOVE | VM_LOCKED;
+	}
 	/* mlock MCL_FUTURE? */
 	if (vm_flags & VM_LOCKED) {
 		unsigned long locked, lock_limit;
Index: linux-2.6.16-mm2/include/linux/mm.h
===================================================================
--- linux-2.6.16-mm2.orig/include/linux/mm.h	2006-03-29 19:20:07.000000000 -0800
+++ linux-2.6.16-mm2/include/linux/mm.h	2006-03-29 19:20:28.000000000 -0800
@@ -167,6 +167,8 @@ extern unsigned int kobjsize(const void 
 #define VM_MAPPED_COPY	0x01000000	/* T if mapped copy of data (nommu mmap) */
 #define VM_INSERTPAGE	0x02000000	/* The vma has had "vm_insert_page()" done on it */
 
+#define VM_DONTMOVE	0x04000000	/* Do not move pages in this vma */
+
 #ifndef VM_STACK_DEFAULT_FLAGS		/* arch can override this */
 #define VM_STACK_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS
 #endif
Index: linux-2.6.16-mm2/include/asm-generic/mman.h
===================================================================
--- linux-2.6.16-mm2.orig/include/asm-generic/mman.h	2006-03-19 21:53:29.000000000 -0800
+++ linux-2.6.16-mm2/include/asm-generic/mman.h	2006-03-29 19:20:28.000000000 -0800
@@ -19,6 +19,7 @@
 #define MAP_TYPE	0x0f		/* Mask for type of mapping */
 #define MAP_FIXED	0x10		/* Interpret addr exactly */
 #define MAP_ANONYMOUS	0x20		/* don't use a file */
+#define MAP_DONTMOVE	0x40		/* do not move any pages in there */
 
 #define MS_ASYNC	1		/* sync memory asynchronously */
 #define MS_INVALIDATE	2		/* invalidate the caches */
Index: linux-2.6.16-mm2/mm/rmap.c
===================================================================
--- linux-2.6.16-mm2.orig/mm/rmap.c	2006-03-29 19:20:13.000000000 -0800
+++ linux-2.6.16-mm2/mm/rmap.c	2006-03-29 19:20:28.000000000 -0800
@@ -600,7 +600,7 @@ static int try_to_unmap_one(struct page 
 	 * If it's recently referenced (perhaps page_referenced
 	 * skipped over this mm) then we should reactivate it.
 	 */
-	if ((vma->vm_flags & VM_LOCKED) ||
+	if ((vma->vm_flags & (VM_LOCKED|VM_DONTMOVE)) ||
 			(ptep_clear_flush_young(vma, address, pte)
 				&& !ignore_refs)) {
 		ret = SWAP_FAIL;
@@ -788,7 +788,7 @@ static int try_to_unmap_file(struct page
 
 	list_for_each_entry(vma, &mapping->i_mmap_nonlinear,
 						shared.vm_set.list) {
-		if (vma->vm_flags & VM_LOCKED)
+		if (vma->vm_flags & (VM_LOCKED|VM_DONTMOVE))
 			continue;
 		cursor = (unsigned long) vma->vm_private_data;
 		if (cursor > max_nl_cursor)
@@ -822,7 +822,7 @@ static int try_to_unmap_file(struct page
 	do {
 		list_for_each_entry(vma, &mapping->i_mmap_nonlinear,
 						shared.vm_set.list) {
-			if (vma->vm_flags & VM_LOCKED)
+			if (vma->vm_flags & (VM_LOCKED|VM_DONTMOVE))
 				continue;
 			cursor = (unsigned long) vma->vm_private_data;
 			while ( cursor < max_nl_cursor &&