Public bug reported:
[Impact]
CONFIG_NUMA_BALANCING and CONFIG_NUMA_BALANCING_DEFAULT_ENABLED were both set
to =y in hwe-x/hwe-y. This changed to =n in hwe-z, unintentionally as far as I
can tell. This can lead to performance degradation on NUMA-based arm64 systems
when processes migrate, and their memory accesses now suffer additional latency.
[Test Case]
At a functional level:
test -f /proc/sys/kernel/numabalancing
Performance?
[Regression Risk]
** Affects: linux (Ubuntu)
Importance: Medium
Assignee: dann frazier (dannf)
Status: In Progress
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https://bugs.launchpad.net/bugs/1690914
Title:
[Regression] NUMA_BALANCING disabled on arm64
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