[Expired for OpenStack Compute (nova) because there has been no activity
for 60 days.]
** Changed in: nova
Status: Incomplete => Expired
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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1714895
Title:
Instance failed to create when numa node has enough free vcpus but has
not enough sibling vcpus
Status in OpenStack Compute (nova):
Expired
Bug description:
Instance failed to create when numa node has enough free vcpus but has not
enough sibling vcpus.
eg:
Host has following numa topology:
node 0: 0-7,16-23
node 1: 8-15,24-31
vcpu_pin_set is 1-7,16-23,7-15,24-31
I want to create an instance with 30 vcpus with flavor which has extra_specs:
hw:cpu_policy=dedicated and hu:numa_nodes=2. But it failed for the following
condition in _get_pinning function:
if threads_no * len(sibling_set) < (
len(instance_cores) + num_cpu_reserved):
return None, None
because:
threads_no=1 len(sibling_set)=7 len(instance_cores)=15 and threads_no=2
len(sibling_set)=7 len(instance_cores)=15
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