[root@localhost xen]# cat /var/log/xend-debug.log
Failed alocation for dom 28 : 65536 pages order 0 addr_bits 0
Traceback (most recent call last):
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 636, in construct
    self.init_domain()
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 818, in init_domain
    id = self.image.initDomain(self.id, self.memory, self.ssidref, cpu, self.cpu_weight)
  File "/usr/lib/python/xen/xend/image.py", line 167, in initDomain
    xc.domain_memory_increase_reservation(dom, mem_kb-lmem_kb, 0, 0)
error: (12, 'Cannot allocate memory')
Traceback (most recent call last):
  File "/usr/lib/python/xen/xend/server/SrvDomainDir.py", line 78, in op_create    dominfo = self.xd.domain_create(config)
  File "/usr/lib/python/xen/xend/XendDomain.py", line 293, in domain_create
    dominfo = XendDomainInfo.create(self.dbmap, config)
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 162, in create
    vm.construct(config)
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 651, in construct
    self.destroy()
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 774, in destroy
    self.cleanup()
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 743, in cleanup
    self.release_devices()
  File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 791, in release_devices
    for d in t.list("vbd"):
  File "/usr/lib/python/xen/xend/xenstore/xstransact.py", line 110, in list
    ret.extend(self._list(key))
  File "/usr/lib/python/xen/xend/xenstore/xstransact.py", line 103, in _list
    return map(lambda x: key + "/" + x, xshandle().ls(path))
RuntimeError: (2, 'No such file or directory')
[root@localhost xen]#