Public bug reported:
There is a lock in:
https://github.com/openstack/nova/blob/def4b17934a3b2cf783d0177d6a9632916dfd10f/nova/context.py#L363
it is used to prevent from creating duplicated db and mq connections for
racy context content switching, the rece condition actually only occours
if and only if there is no infomation about this cell in the cache(first
time call).
As for the current implementation, we lock the whole call, which may
affect performance.
** Affects: nova
Importance: Undecided
Assignee: Zhenyu Zheng (zhengzhenyu)
Status: New
** Changed in: nova
Assignee: (unassigned) => Zhenyu Zheng (zhengzhenyu)
** Description changed:
There is a lock in:
https://github.com/openstack/nova/blob/def4b17934a3b2cf783d0177d6a9632916dfd10f/nova/context.py#L363
- it is used to prevent from creating duplicated db and mq connections for racy
context content switching,
- the rece condition actually only occours if and only if there is no
infomation about this cell in the
- cache(first time call).
+ it is used to prevent from creating duplicated db and mq connections for
+ racy context content switching, the rece condition actually only occours
+ if and only if there is no infomation about this cell in the cache(first
+ time call).
As for the current implementation, we lock the whole call, which may
affect performance.
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https://bugs.launchpad.net/bugs/1788564
Title:
Increase set_target_cell performance by refactor where we lock
Status in OpenStack Compute (nova):
New
Bug description:
There is a lock in:
https://github.com/openstack/nova/blob/def4b17934a3b2cf783d0177d6a9632916dfd10f/nova/context.py#L363
it is used to prevent from creating duplicated db and mq connections
for racy context content switching, the rece condition actually only
occours if and only if there is no infomation about this cell in the
cache(first time call).
As for the current implementation, we lock the whole call, which may
affect performance.
To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1788564/+subscriptions
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