In some cases, for pure data validation and processing, you can get performance improvements of **20x** or more. This means 2,000% or more. 🤯

*   deviceplugin has been extended to more gracefully handle the full device plugin lifecycle, including: ([#55088](https://github.com/kubernetes/kubernetes/pull/55088),[ @jiayingz](https://github.com/jiayingz))
    *   Kubelet now uses an explicit cm.GetDevicePluginResourceCapacity() function that makes it possible to more accurately determine what resources are inactive and return a more accurate view of available resources.

	// Linear search, we likely have to insert at front.
	for i, existing := range x.versions {
		if existing.header.ModTime <= modTime {
			// Insert at current idx. First move current back.
			copy(x.versions[i+1:], x.versions[i:])
			x.versions[i] = xlMetaV2ShallowVersion{
				header: ver.header(),
				meta:   encoded,
			}
			return nil
		}
	}

See [this doc](https://github.com/kubernetes/community/blob/master/sig-storage/volume-plugin-faq.md#kubernetes-volume-plugin-faq-for-storage-vendors) for more information.
Maintainers of FlexVolume drivers should implement a CSI driver and move users of FlexVolume to CSI.
Users of FlexVolume should move their workloads to CSI driver.

### Deprecation of klog specific flags

* add goroutine to move unschedulable pods to activeq if they are not retried for more than 1 minute ([#72558](https://github.com/kubernetes/kubernetes/pull/72558), [@denkensk](https://github.com/denkensk))

    - [SIG Windows development tools](#sig-windows-development-tools)
    - [Deploy a more secure control plane with kubeadm](#deploy-a-more-secure-control-plane-with-kubeadm)
    - [etcd moves to version 3.5.0](#etcd-moves-to-version-350)
    - [Kubernetes Node system swap support](#kubernetes-node-system-swap-support)
    - [Cluster-wide seccomp defaults](#cluster-wide-seccomp-defaults)

func (s *xlStorage) openFileSync(filePath string, mode int, skipParent string) (f *os.File, err error) {
	return s.openFile(filePath, mode|writeMode, skipParent)
}

func (s *xlStorage) openFile(filePath string, mode int, skipParent string) (f *os.File, err error) {
	if skipParent == "" {
		skipParent = s.drivePath
	}
	// Create top level directories if they don't exist.
	// with mode 0777 mkdir honors system umask.

define the order of execution */\n    order: 400,\n    /** @prop {Boolean} enabled=true - Whether the modifier is enabled or not */\n    enabled: true,\n    /** @prop {ModifierFn} */\n    fn: keepTogether,\n  },\n\n  /**\n   * This modifier is used to move the `arrowElement` of the popper to make\n   * sure it is positioned between the reference element and its popper element.\n   * It will read the outer size of the `arrowElement` node to detect how many\n   * pixels of conjunction are needed.\n   *\n...

	peerMetricsGroups       []*MetricsGroupV2
	bucketPeerMetricsGroups []*MetricsGroupV2
)

// v2MetricsMaxBuckets enforces a bucket count limit on metrics for v2 calls.
// If people hit this limit, they should move to v3, as certain calls explode with high bucket count.
const v2MetricsMaxBuckets = 100

func init() {
	clusterMetricsGroups := []*MetricsGroupV2{
		getNodeHealthMetrics(MetricsGroupOpts{dependGlobalNotificationSys: true}),

	if err != nil {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return
	}

	// Add ldap users which have mapped policies if in LDAP mode
	// FIXME(vadmeste): move this to policy info in the future
	ldapUsers, err := globalIAMSys.ListLDAPUsers(ctx)
	if err != nil && err != errIAMActionNotAllowed {
		writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
		return