- Introducing Memory quality of service support with `cgroups v2 (Alpha)`. The `MemoryQoS` feature is now in Alpha. This allows `kubelet` running with `cgroups v2` to set memory QoS at container, pod and QoS level to protect and guarantee better memory quality. This feature can be enabled through feature gate Memory QoS. ([#102970](https://github.com/kubernetes/kubernetes/pull/102970), [@borgerli](https://github.com/borgerli))

  Burstable QoS pods. For Best-Effort/Guaranteed QoS pods, swap would be disabled.
  
  Containers with memory requests equal to their memory limits also won't have
  swap access, and it is a way to opt-out of swap for a single container.
  
  The formula for the swap limit for Burstable QoS pods is:
  `(<memory-request>/<node-memory-capacity>)*<node-swap-capacity>`.
  

- Secure serving on port 10258 to...

- Fixed a bug where the kubelet ephemerally failed with `failed to initialize top level QOS containers: root container [kubepods] doesn't exist`, due to the cpuset cgroup being deleted on cgroup v2 with systemd cgroup manager.

- Enabled completion for aliases defined in `kubectlrc`. ([#131586](https://github.com/kubernetes/kubernetes/pull/131586), [@ardaguclu](https://github.com/ardaguclu))

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* Fixed regression where kubelet --cpu-cfs-quota flag did not work when --cgroups-per-qos was enabled ([#61294](https://github.com/kubernetes/kubernetes/pull/61294), [@derekwaynecarr](https://github.com/derekwaynecarr))

* Fix init container status reporting when active deadline is exceeded. ([#46305](https://github.com/kubernetes/kubernetes/pull/46305), [@sjenning](https://github.com/sjenning))

* Moved qos to api.helpers. ([#44906](https://github.com/kubernetes/kubernetes/pull/44906), [@k82cn](https://github.com/k82cn))

- When `cpu-manager-policy=static` is configured, containers meeting the qualifications for static cpu assignment (i.e. Containers with integer CPU `requests` in pods with `Guaranteed` QOS) will not have cfs quota enforced. Because this fix changes a long-established behavior, users observing a regressions can use the `DisableCPUQuotaWithExclusiveCPUs` feature gate (enabled by default) to restore the previous behavior. Please file an...

### Bug or Regression

- Fix a scheduler preemption issue where the victim pod was not deleted due to incorrect status patching. This issue occurred when the preemptor and victim pods had different QoS classes in their status, causing the preemption to fail entirely. ([#126694](https://github.com/kubernetes/kubernetes/pull/126694), [@Huang-Wei](https://github.com/Huang-Wei)) [SIG Scheduling]