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-rw-r--r--releasenotes/notes/default-host-numa-strategy-to-spread-18668c6d80154042.yaml12
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+---
+upgrade:
+ - |
+ During the triage of https://bugs.launchpad.net/nova/+bug/1978372
+ we compared the performance of nova's numa allocations strategies
+ as it applied to the large numbers of host and guest numa nodes.
+ Prior to ``Xena`` nova only supported a linear packing strategy.
+ In ``Xena`` ``[compute]/packing_host_numa_cells_allocation_strategy``
+ was introduced maintaining the previous packing behavior by default.
+ The numa allocation strategy has now been defaulted to spread.
+ The old behavior can be restored by defining:
+ ``[compute]/packing_host_numa_cells_allocation_strategy=true``