diff --git a/arch/alpha/include/uapi/asm/mman.h b/arch/alpha/include/uapi/asm/mman.h
index ec72436..77ae8db 100644
--- a/arch/alpha/include/uapi/asm/mman.h
+++ b/arch/alpha/include/uapi/asm/mman.h
@@ -37,8 +37,10 @@
 
 #define MCL_CURRENT	 8192		/* lock all currently mapped pages */
 #define MCL_FUTURE	16384		/* lock all additions to address space */
+#define MCL_ONFAULT	32768		/* lock all pages that are faulted in */
 
 #define MLOCK_LOCKED	0x01		/* Lock and populate the specified range */
+#define MLOCK_ONFAULT	0x02		/* Lock pages in range after they are faulted in, do not prefault */
 
 #define MADV_NORMAL	0		/* no further special treatment */
 #define MADV_RANDOM	1		/* expect random page references */
diff --git a/arch/mips/include/uapi/asm/mman.h b/arch/mips/include/uapi/asm/mman.h
index 67c1cdf..71ed81d 100644
--- a/arch/mips/include/uapi/asm/mman.h
+++ b/arch/mips/include/uapi/asm/mman.h
@@ -61,11 +61,13 @@
  */
 #define MCL_CURRENT	1		/* lock all current mappings */
 #define MCL_FUTURE	2		/* lock all future mappings */
+#define MCL_ONFAULT	4		/* lock all pages that are faulted in */
 
 /*
  * Flags for mlock
  */
 #define MLOCK_LOCKED	0x01		/* Lock and populate the specified range */
+#define MLOCK_ONFAULT	0x02		/* Lock pages in range after they are faulted in, do not prefault */
 
 #define MADV_NORMAL	0		/* no further special treatment */
 #define MADV_RANDOM	1		/* expect random page references */
diff --git a/arch/parisc/include/uapi/asm/mman.h b/arch/parisc/include/uapi/asm/mman.h
index daab994..c0871ce 100644
--- a/arch/parisc/include/uapi/asm/mman.h
+++ b/arch/parisc/include/uapi/asm/mman.h
@@ -31,8 +31,10 @@
 
 #define MCL_CURRENT	1		/* lock all current mappings */
 #define MCL_FUTURE	2		/* lock all future mappings */
+#define MCL_ONFAULT	4		/* lock all pages that are faulted in */
 
 #define MLOCK_LOCKED	0x01		/* Lock and populate the specified range */
+#define MLOCK_ONFAULT	0x02		/* Lock pages in range after they are faulted in, do not prefault */
 
 #define MADV_NORMAL     0               /* no further special treatment */
 #define MADV_RANDOM     1               /* expect random page references */
diff --git a/arch/powerpc/include/uapi/asm/mman.h b/arch/powerpc/include/uapi/asm/mman.h
index 189e85f..f93f7eb 100644
--- a/arch/powerpc/include/uapi/asm/mman.h
+++ b/arch/powerpc/include/uapi/asm/mman.h
@@ -22,8 +22,10 @@
 
 #define MCL_CURRENT     0x2000          /* lock all currently mapped pages */
 #define MCL_FUTURE      0x4000          /* lock all additions to address space */
+#define MCL_ONFAULT	0x8000		/* lock all pages that are faulted in */
 
 #define MLOCK_LOCKED	0x01		/* Lock and populate the specified range */
+#define MLOCK_ONFAULT	0x02		/* Lock pages in range after they are faulted in, do not prefault */
 
 #define MAP_POPULATE	0x8000		/* populate (prefault) pagetables */
 #define MAP_NONBLOCK	0x10000		/* do not block on IO */
diff --git a/arch/sparc/include/uapi/asm/mman.h b/arch/sparc/include/uapi/asm/mman.h
index 13d51be..8cd2ebc 100644
--- a/arch/sparc/include/uapi/asm/mman.h
+++ b/arch/sparc/include/uapi/asm/mman.h
@@ -17,8 +17,10 @@
 
 #define MCL_CURRENT     0x2000          /* lock all currently mapped pages */
 #define MCL_FUTURE      0x4000          /* lock all additions to address space */
+#define MCL_ONFAULT	0x8000		/* lock all pages that are faulted in */
 
 #define MLOCK_LOCKED	0x01		/* Lock and populate the specified range */
+#define MLOCK_ONFAULT	0x02		/* Lock pages in range after they are faulted in, do not prefault */
 
 #define MAP_POPULATE	0x8000		/* populate (prefault) pagetables */
 #define MAP_NONBLOCK	0x10000		/* do not block on IO */
diff --git a/arch/tile/include/uapi/asm/mman.h b/arch/tile/include/uapi/asm/mman.h
index f69ce48..acdd013 100644
--- a/arch/tile/include/uapi/asm/mman.h
+++ b/arch/tile/include/uapi/asm/mman.h
@@ -36,11 +36,14 @@
  */
 #define MCL_CURRENT	1		/* lock all current mappings */
 #define MCL_FUTURE	2		/* lock all future mappings */
+#define MCL_ONFAULT	4		/* lock all pages that are faulted in */
+
 
 /*
  * Flags for mlock
  */
 #define MLOCK_LOCKED	0x01		/* Lock and populate the specified range */
+#define MLOCK_ONFAULT	0x02		/* Lock pages in range after they are faulted in, do not prefault */
 
 
 #endif /* _ASM_TILE_MMAN_H */
diff --git a/arch/xtensa/include/uapi/asm/mman.h b/arch/xtensa/include/uapi/asm/mman.h
index 11f354f..5725a15 100644
--- a/arch/xtensa/include/uapi/asm/mman.h
+++ b/arch/xtensa/include/uapi/asm/mman.h
@@ -74,11 +74,13 @@
  */
 #define MCL_CURRENT	1		/* lock all current mappings */
 #define MCL_FUTURE	2		/* lock all future mappings */
+#define MCL_ONFAULT	4		/* lock all pages that are faulted in */
 
 /*
  * Flags for mlock
  */
 #define MLOCK_LOCKED	0x01		/* Lock and populate the specified range */
+#define MLOCK_ONFAULT	0x02		/* Lock pages in range after they are faulted in, do not prefault */
 
 #define MADV_NORMAL	0		/* no further special treatment */
 #define MADV_RANDOM	1		/* expect random page references */
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index ca1e091..38d69fc 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -579,6 +579,7 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma)
 #ifdef CONFIG_X86_INTEL_MPX
 		[ilog2(VM_MPX)]		= "mp",
 #endif
+		[ilog2(VM_LOCKONFAULT)]	= "lf",
 		[ilog2(VM_LOCKED)]	= "lo",
 		[ilog2(VM_IO)]		= "io",
 		[ilog2(VM_SEQ_READ)]	= "sr",
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 2e872f9..ae40c7d 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -127,6 +127,7 @@ extern unsigned int kobjsize(const void *objp);
 #define VM_PFNMAP	0x00000400	/* Page-ranges managed without "struct page", just pure PFN */
 #define VM_DENYWRITE	0x00000800	/* ETXTBSY on write attempts.. */
 
+#define VM_LOCKONFAULT	0x00001000	/* Lock the pages covered when they are faulted in */
 #define VM_LOCKED	0x00002000
 #define VM_IO           0x00004000	/* Memory mapped I/O or similar */
 
diff --git a/include/uapi/asm-generic/mman.h b/include/uapi/asm-generic/mman.h
index 242436b..555aab0 100644
--- a/include/uapi/asm-generic/mman.h
+++ b/include/uapi/asm-generic/mman.h
@@ -17,7 +17,9 @@
 
 #define MCL_CURRENT	1		/* lock all current mappings */
 #define MCL_FUTURE	2		/* lock all future mappings */
+#define MCL_ONFAULT	4		/* lock all pages that are faulted in */
 
 #define MLOCK_LOCKED	0x01		/* Lock and populate the specified range */
+#define MLOCK_ONFAULT	0x02		/* Lock pages in range after they are faulted in, do not prefault */
 
 #endif /* __ASM_GENERIC_MMAN_H */
diff --git a/mm/mlock.c b/mm/mlock.c
index d6e61d6..d9414d6 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -502,11 +502,12 @@ static int mlock_fixup(struct vm_area_struct *vma, struct vm_area_struct **prev,
 	pgoff_t pgoff;
 	int nr_pages;
 	int ret = 0;
-	int lock = !!(newflags & VM_LOCKED);
+	int lock = !!(newflags & (VM_LOCKED | VM_LOCKONFAULT));
 
 	if (newflags == vma->vm_flags || (vma->vm_flags & VM_SPECIAL) ||
 	    is_vm_hugetlb_page(vma) || vma == get_gate_vma(current->mm))
-		goto out;	/* don't set VM_LOCKED,  don't count */
+		/* don't set VM_LOCKED or VM_LOCKONFAULT and don't count */
+		goto out;
 
 	pgoff = vma->vm_pgoff + ((start - vma->vm_start) >> PAGE_SHIFT);
 	*prev = vma_merge(mm, *prev, start, end, newflags, vma->anon_vma,
@@ -581,10 +582,12 @@ static int apply_vma_flags(unsigned long start, size_t len,
 		/* Here we know that  vma->vm_start <= nstart < vma->vm_end. */
 
 		newflags = vma->vm_flags;
-		if (add_flags)
+		if (add_flags) {
+			newflags &= ~(VM_LOCKED | VM_LOCKONFAULT);
 			newflags |= flags;
-		else
+		} else {
 			newflags &= ~flags;
+		}
 
 		tmp = vma->vm_end;
 		if (tmp > end)
@@ -637,9 +640,12 @@ static int do_mlock(unsigned long start, size_t len, vm_flags_t flags)
 	if (error)
 		return error;
 
-	error = __mm_populate(start, len, 0);
-	if (error)
-		return __mlock_posix_error_return(error);
+	if (flags & VM_LOCKED) {
+		error = __mm_populate(start, len, 0);
+		if (error)
+			return __mlock_posix_error_return(error);
+	}
+
 	return 0;
 }
 
@@ -650,10 +656,14 @@ SYSCALL_DEFINE2(mlock, unsigned long, start, size_t, len)
 
 SYSCALL_DEFINE3(mlock2, unsigned long, start, size_t, len, int, flags)
 {
-	if (!flags || flags & ~MLOCK_LOCKED)
+	if (!flags || (flags & ~(MLOCK_LOCKED | MLOCK_ONFAULT)) ||
+	    flags == (MLOCK_LOCKED | MLOCK_ONFAULT))
 		return -EINVAL;
 
-	return do_mlock(start, len, VM_LOCKED);
+	if (flags & MLOCK_LOCKED)
+		return do_mlock(start, len, VM_LOCKED);
+
+	return do_mlock(start, len, VM_LOCKONFAULT);
 }
 
 static int do_munlock(unsigned long start, size_t len, vm_flags_t flags)
@@ -677,26 +687,41 @@ SYSCALL_DEFINE2(munlock, unsigned long, start, size_t, len)
 
 SYSCALL_DEFINE3(munlock2, unsigned long, start, size_t, len, int, flags)
 {
-	if (!flags || flags & ~MLOCK_LOCKED)
+	vm_flags_t to_clear = 0;
+
+	if (!flags || flags & ~(MLOCK_LOCKED | MLOCK_ONFAULT))
 		return -EINVAL;
-	return do_munlock(start, len, VM_LOCKED);
+
+	if (flags & MLOCK_LOCKED)
+		to_clear |= VM_LOCKED;
+	if (flags & MLOCK_ONFAULT)
+		to_clear |= VM_LOCKONFAULT;
+
+	return do_munlock(start, len, to_clear);
 }
 
 static int do_mlockall(int flags)
 {
 	struct vm_area_struct * vma, * prev = NULL;
+	vm_flags_t to_add;
 
 	if (flags & MCL_FUTURE)
 		current->mm->def_flags |= VM_LOCKED;
 	if (flags == MCL_FUTURE)
 		goto out;
 
+	if (flags & MCL_ONFAULT) {
+		current->mm->def_flags |= VM_LOCKONFAULT;
+		to_add = VM_LOCKONFAULT;
+	} else {
+		to_add = VM_LOCKED;
+	}
+
 	for (vma = current->mm->mmap; vma ; vma = prev->vm_next) {
 		vm_flags_t newflags;
 
-		newflags = vma->vm_flags & ~VM_LOCKED;
-		if (flags & MCL_CURRENT)
-			newflags |= VM_LOCKED;
+		newflags = vma->vm_flags & ~(VM_LOCKED | VM_LOCKONFAULT);
+		newflags |= to_add;
 
 		/* Ignore errors */
 		mlock_fixup(vma, &prev, vma->vm_start, vma->vm_end, newflags);
@@ -711,7 +736,8 @@ SYSCALL_DEFINE1(mlockall, int, flags)
 	unsigned long lock_limit;
 	int ret = -EINVAL;
 
-	if (!flags || (flags & ~(MCL_CURRENT | MCL_FUTURE)))
+	if (!flags || (flags & ~(MCL_CURRENT | MCL_FUTURE | MCL_ONFAULT)) ||
+	    (flags & (MCL_FUTURE | MCL_ONFAULT)) == (MCL_FUTURE | MCL_ONFAULT))
 		goto out;
 
 	ret = -EPERM;
@@ -740,18 +766,24 @@ out:
 static int do_munlockall(int flags)
 {
 	struct vm_area_struct * vma, * prev = NULL;
+	vm_flags_t to_clear = 0;
 
 	if (flags & MCL_FUTURE)
 		current->mm->def_flags &= ~VM_LOCKED;
+	if (flags & MCL_ONFAULT)
+		current->mm->def_flags &= ~VM_LOCKONFAULT;
 	if (flags == MCL_FUTURE)
 		goto out;
 
+	if (flags & MCL_CURRENT)
+		to_clear |= VM_LOCKED;
+	if (flags & MCL_ONFAULT)
+		to_clear |= VM_LOCKONFAULT;
+
 	for (vma = current->mm->mmap; vma ; vma = prev->vm_next) {
 		vm_flags_t newflags;
 
-		newflags = vma->vm_flags;
-		if (flags & MCL_CURRENT)
-			newflags &= ~VM_LOCKED;
+		newflags = vma->vm_flags & ~to_clear;
 
 		/* Ignore errors */
 		mlock_fixup(vma, &prev, vma->vm_start, vma->vm_end, newflags);
@@ -766,7 +798,7 @@ SYSCALL_DEFINE0(munlockall)
 	int ret;
 
 	down_write(&current->mm->mmap_sem);
-	ret = do_munlockall(MCL_CURRENT | MCL_FUTURE);
+	ret = do_munlockall(MCL_CURRENT | MCL_FUTURE | MCL_ONFAULT);
 	up_write(&current->mm->mmap_sem);
 	return ret;
 }
@@ -775,7 +807,7 @@ SYSCALL_DEFINE1(munlockall2, int, flags)
 {
 	int ret = -EINVAL;
 
-	if (!flags || flags & ~(MCL_CURRENT | MCL_FUTURE))
+	if (!flags || flags & ~(MCL_CURRENT | MCL_FUTURE | MCL_ONFAULT))
 		return ret;
 
 	down_write(&current->mm->mmap_sem);
diff --git a/mm/mmap.c b/mm/mmap.c
index aa632ad..eb970ba 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1232,8 +1232,8 @@ static inline int mlock_future_check(struct mm_struct *mm,
 {
 	unsigned long locked, lock_limit;
 
-	/*  mlock MCL_FUTURE? */
-	if (flags & VM_LOCKED) {
+	/*  mlock MCL_FUTURE or MCL_ONFAULT? */
+	if (flags & (VM_LOCKED | VM_LOCKONFAULT)) {
 		locked = len >> PAGE_SHIFT;
 		locked += mm->locked_vm;
 		lock_limit = rlimit(RLIMIT_MEMLOCK);
diff --git a/mm/swap.c b/mm/swap.c
index a3a0a2f..3580a21 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -710,7 +710,8 @@ void lru_cache_add_active_or_unevictable(struct page *page,
 {
 	VM_BUG_ON_PAGE(PageLRU(page), page);
 
-	if (likely((vma->vm_flags & (VM_LOCKED | VM_SPECIAL)) != VM_LOCKED)) {
+	if (likely((vma->vm_flags & (VM_LOCKED | VM_LOCKONFAULT)) == 0) ||
+		   (vma->vm_flags & VM_SPECIAL)) {
 		SetPageActive(page);
 		lru_cache_add(page);
 		return;
