Public bug reported:
1 Node pci_passthrough_whitelist is set to pci device，ComputeNode pci pools can
get pools。
2 change pci_passthrough_whitelist empty，ComputeNode pci pools can‘t change
because：
def _convert_pci_stats_to_db_format(updates):
pools = updates.pop('pci_device_pools', None)
if pools:
updates['pci_stats'] = jsonutils.dumps(pools.obj_to_primitive())
if pools is empty，pci_stats will be do nothing.
That means db will be the old one.
we should be like this:
if pools:
updates['pci_stats'] = jsonutils.dumps(pools.obj_to_primitive())
else
xxxxxxxxx
** Affects: nova
Importance: Undecided
Assignee: Yan Songming (songmingyan)
Status: New
** Changed in: nova
Assignee: (unassigned) => Yan Songming (songmingyan)
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https://bugs.launchpad.net/bugs/1550277
Title:
ComputeNode pci pools can't change from not empty to empty.
Status in OpenStack Compute (nova):
New
Bug description:
1 Node pci_passthrough_whitelist is set to pci device，ComputeNode pci pools
can get pools。
2 change pci_passthrough_whitelist empty，ComputeNode pci pools can‘t change
because：
def _convert_pci_stats_to_db_format(updates):
pools = updates.pop('pci_device_pools', None)
if pools:
updates['pci_stats'] = jsonutils.dumps(pools.obj_to_primitive())
if pools is empty，pci_stats will be do nothing.
That means db will be the old one.
we should be like this:
if pools:
updates['pci_stats'] = jsonutils.dumps(pools.obj_to_primitive())
else
xxxxxxxxx
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