多处理时出现 OSError 38 [Errno 38]

我遇到以下错误：

$ sudo chmod a+rwxt /dev/shm/
$ ls -ld /dev/shm/
drwxrwxrwt 2 root root 4096 Feb  4 06:56 /dev/shm/
$ python
Python 2.6.6 (r266:84292, Dec 26 2010, 22:31:48) 
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import multiprocessing
>>> mp = multiprocessing.Pool(2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.6/multiprocessing/__init__.py", line 227, in Pool
    return Pool(processes, initializer, initargs)
  File "/usr/lib/python2.6/multiprocessing/pool.py", line 84, in __init__
    self._setup_queues()
  File "/usr/lib/python2.6/multiprocessing/pool.py", line 131, in _setup_queues
    self._inqueue = SimpleQueue()
  File "/usr/lib/python2.6/multiprocessing/queues.py", line 328, in __init__
    self._rlock = Lock()
  File "/usr/lib/python2.6/multiprocessing/synchronize.py", line 117, in __init__
    SemLock.__init__(self, SEMAPHORE, 1, 1)
  File "/usr/lib/python2.6/multiprocessing/synchronize.py", line 49, in __init__
    sl = self._semlock = _multiprocessing.SemLock(kind, value, maxvalue)
OSError: [Errno 38] Function not implemented

导致此错误的其他原因可能是什么（除了对 /dev/shm 的读/写访问之外）？

Thanks!

对于来自 Google 的其他人来说，答案是Django Celery 实现 - OSError errno 38 - 功能未实现 https://stackoverflow.com/questions/3314031/django-celery-implementation-oserror-errno-38-function-not-implemented#comment7543003_3699231:

通过添加让它工作none /dev/shm tmpfs rw,nosuid,nodev,noexec 0 0 to /etc/fstab并重新启动

而不是重新启动，sudo mount /dev/shm works.