* Implement kubectl rollout undo and history for DaemonSet ([#46144](https://github.com/kubernetes/kubernetes/pull/46144), [@janetkuo](https://github.com/janetkuo))
* Respect PDBs during node upgrades and add test coverage to the ServiceTest upgrade test. ([#45748](https://github.com/kubernetes/kubernetes/pull/45748), [@mml](https://github.com/mml))

#### Continuous Improvement
- Project sustainability is not just about features. Many SIGs have been working on  improving test coverage, ensuring the basics stay reliable, and stability of the core feature set and working on maturing existing features and cleaning up the backlog.

#### Extensibility

*   You can now add "options" to the host's /etc/resolv.conf (or --resolv-conf), and they will be copied into pod's resolv.conf when dnsPolicy is Default. Being able to customize options is important because it is common to leverage options to fine-tune the behavior of DNS client. ([#54773](https://github.com/kubernetes/kubernetes/pull/54773),[ @phsiao](https://github.com/phsiao))

* kubeadm will now deploy CoreDNS by default instead of KubeDNS ([#63509](https://github.com/kubernetes/kubernetes/pull/63509), [@detiber](https://github.com/detiber))
* This PR will leverage subtests on the existing table tests for the scheduler units. ([#63658](https://github.com/kubernetes/kubernetes/pull/63658), [@xchapter7x](https://github.com/xchapter7x))

pkg syscall (linux-386), const VDISCARD ideal-int
pkg syscall (linux-386), const VEOF ideal-int
pkg syscall (linux-386), const VEOL ideal-int
pkg syscall (linux-386), const VEOL2 ideal-int
pkg syscall (linux-386), const VERASE ideal-int
pkg syscall (linux-386), const VINTR ideal-int
pkg syscall (linux-386), const VKILL ideal-int
pkg syscall (linux-386), const VLNEXT ideal-int
pkg syscall (linux-386), const VMIN ideal-int