I try to run odoo with gevent option but i got this error :

Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\gevent\greenlet.py", line 327, in run
    result = self._run(*self.args, **self.kwargs)
  File "C:\Users\cayley\git\odoo\openerp\service\server.py", line 375, in watch_parent
    ppid = os.getppid()
AttributeError: 'module' object has no attribute 'getppid'
<Greenlet at 0x5521d58L: <bound method GeventServer.watch_parent of <openerp.service.server.GeventServer object at 0x0000000004FC7128>>> failed with AttributeError

Someone can help me to fixe this ?