Both debian ia64 and PPC are failing the mp test suite with the 
following error:

Re-running test 'test_multiprocessing' in verbose mode
test test_multiprocessing crashed -- <type 'exceptions.OSError'>: [Errno 
38] Function not implemented
Traceback (most recent call last):
  File "./Lib/test/regrtest.py", line 554, in runtest_inner
    indirect_test()
  File "/home/pybot/buildarea/trunk.klose-debian-
ppc/build/Lib/test/test_multiprocessing.py", line 1764, in test_main
    ProcessesMixin.pool = multiprocessing.Pool(4)
  File "/home/pybot/buildarea/trunk.klose-debian-
ppc/build/Lib/multiprocessing/__init__.py", line 226, in Pool
    return Pool(processes, initializer, initargs)
  File "/home/pybot/buildarea/trunk.klose-debian-
ppc/build/Lib/multiprocessing/pool.py", line 84, in __init__
    self._setup_queues()
  File "/home/pybot/buildarea/trunk.klose-debian-
ppc/build/Lib/multiprocessing/pool.py", line 131, in _setup_queues
    self._inqueue = SimpleQueue()
  File "/home/pybot/buildarea/trunk.klose-debian-
ppc/build/Lib/multiprocessing/queues.py", line 315, in __init__
    self._rlock = Lock()
  File "/home/pybot/buildarea/trunk.klose-debian-
ppc/build/Lib/multiprocessing/synchronize.py", line 106, in __init__
    SemLock.__init__(self, SEMAPHORE, 1, 1)
  File "/home/pybot/buildarea/trunk.klose-debian-
ppc/build/Lib/multiprocessing/synchronize.py", line 38, in __init__
    sl = self._semlock = _multiprocessing.SemLock(kind, value, maxvalue)
OSError: [Errno 38] Function not implemented
[674193 refs]
make: *** [buildbottest] Error 1
program finished with exit code 2

Buildbots:
http://www.python.org/dev/buildbot/stable/ppc%20Debian%20unstable%20trun
k/builds/1607/step-test/0
http://www.python.org/dev/buildbot/stable/ia64%20Ubuntu%20trunk/builds/1
89/step-test/0