diff -r de01f7c37b53 Lib/tempfile.py
--- a/Lib/tempfile.py	Sat May 17 20:02:28 2014 -0700
+++ b/Lib/tempfile.py	Sun May 18 11:52:43 2014 +0200
@@ -33,6 +33,7 @@ import io as _io
 import os as _os
 import shutil as _shutil
 import errno as _errno
+import sys as _sys
 from random import Random as _Random
 import weakref as _weakref
 
@@ -55,6 +56,14 @@ if hasattr(_os, 'TMP_MAX'):
 else:
     TMP_MAX = 10000
 
+if hasattr(_os, 'O_TMPFILE'):
+    _O_TMPFILE = _os.O_TMPFILE
+elif _sys.platform == 'linux':
+    __O_TMPFILE = 0o20000000
+    _O_TMPFILE = (__O_TMPFILE | _os.O_DIRECTORY)
+else:
+    _O_TMPFILE = None
+
 # Although it does not have an underscore for historical reasons, this
 # variable is an internal implementation detail (see issue 10354).
 template = "tmp"
@@ -488,11 +497,32 @@ else:
         Returns an object with a file-like interface.  The file has no
         name, and will cease to exist when it is closed.
         """
+        global _O_TMPFILE
 
         if dir is None:
             dir = gettempdir()
 
         flags = _bin_openflags
+        if _O_TMPFILE is not None:
+            try:
+                flags2 = (flags | _O_TMPFILE) & ~_os.O_CREAT
+                fd = _os.open(dir, flags2, 0o600)
+            except IsADirectoryError:
+                # Linux kernel older than 3.11 ignores O_TMPFILE flag.
+                # Set flag to None to not try again.
+                _O_TMPFILE = None
+            except OSError:
+                # The filesystem of the directory does not support O_TMPFILE.
+                # For example, OSError(95, 'Operation not supported').
+                pass
+            else:
+                try:
+                    return _io.open(fd, mode, buffering=buffering,
+                                    newline=newline, encoding=encoding)
+                except:
+                    _os.close(fd)
+                    raise
+            # Fallback to _mkstemp_inner().
 
         (fd, name) = _mkstemp_inner(dir, prefix, suffix, flags)
         try: