With xen-3.0.4, I'm getting the following traceback when starting xend:

...
  File "/usr/lib64/python2.5/site-packages/xen/xend/XendNode.py", line 220, in
instance
    inst = XendNode()
  File "/usr/lib64/python2.5/site-packages/xen/xend/XendNode.py", line 35, in
__init__
    self.sr = XendStorageRepository()
  File "/usr/lib64/python2.5/site-packages/xen/xend/XendStorageRepository.py",
line 84, in __init__
    self._refresh()
  File "/usr/lib64/python2.5/site-packages/xen/xend/XendStorageRepository.py",
line 149, in _refresh
    self.storage_free = self._get_free_space()
  File "/usr/lib64/python2.5/site-packages/xen/xend/XendStorageRepository.py",
line 161, in _get_free_space
    stfs = os.statvfs(self.storage_dir)


It's doing this statvfs() in order to figure out how much free space is on the
filesystem where /var/lib/xend/storage/ resides.

Need to update the xen policy to allow the statvfs(), I've tested with:

  fs_getattr_all_fs(xend_t)

and it seems to start up just fine