### Kubernetes Node system swap support

Every system administrator or Kubernetes user has been in the same boat regarding setting up and using Kubernetes: disable swap space. With the release of Kubernetes 1.22, *alpha* support is available to run nodes with swap memory. This change lets administrators opt in to configuring swap on Linux nodes, treating a portion of block storage as additional virtual memory.

- Changed Linux swap handling to restrict access to swap for containers in high priority Pods.
  New Pods that have a node- or cluster-critical priority are prohibited from accessing swap on Linux,

//		g.Offset = int64($4);
//		outcode($1, $2, &g, 0, &$7);
//	}
	MOVM	[R2,R5,R8,g], 0(R1) // MOVM	[R2,R5,R8,g], (R1)
	MOVM	[R2-R5], (R1) // MOVM [R2,R3,R4,R5], (R1)
	MOVM	[R2], (R1)

//
// SWAP
//
//	LTYPE9 cond reg ',' ireg ',' reg
//	{
//		outcode($1, $2, &$5, int32($3.Reg), &$7);
//	}
	STREX	R1, (R2), R3 // STREX (R2), R1, R3

//
// word
//
//	LTYPEH comma ximm
//	{

- Removed general available feature-gate `PDBUnhealthyPodEvictionPolicy`. ([#129500](https://github.com/kubernetes/kubernetes/pull/129500), [@carlory](https://github.com/carlory)) [SIG API Machinery, Apps and Auth]
- Start reporting swap capacity as part of `node.status.nodeSystemInfo`. ([#129954](https://github.com/kubernetes/kubernetes/pull/129954), [@iholder101](https://github.com/iholder101)) [SIG API Machinery, Apps and Node]

- Kubeadm: switch the preflight check (called 'Swap') that verifies if swap is enabled on Linux hosts to report a warning instead of an error. This is related to the graduation of the NodeSwap feature gate in the kubelet to Beta and being enabled by default in 1.23 - allows swap support on Linux hosts. In the next release of kubeadm (1.24) the preflight check will be removed, thus we recommend that you stop using...

  - The deprecated `--show-all` flag to `kubectl get` has been removed  ([#69255](https://github.com/kubernetes/kubernetes/pull/69255), [@Pingan2017](https://github.com/Pingan2017))

- kubelet
  - The deprecated `--experimental-fail-swap-on` flag has been removed ([#69552](https://github.com/kubernetes/kubernetes/pull/69552), [@Pingan2017](https://github.com/Pingan2017))

* kubeadm now produces error during preflight checks if swap is enabled. Users, who can setup kubelet to run in unsupported environment with enabled swap, will be able to skip that preflight check. ([#55399](https://github.com/kubernetes/kubernetes/pull/55399), [@kad](https://github.com/kad))

estElements","inPage","detach","append","prepend","insertBefore","before","after","replaceWith","replaceChild","appendTo","prependTo","insertAfter","replaceAll","original","insert","rnumnonpx","rcustomProp","getStyles","opener","getComputedStyle","swap","old","rboxStyle","curCSS","computed","width","minWidth","maxWidth","isCustomProp","getPropertyValue","pixelBoxStyles","addGetHookIf","conditionFn","hookFn","computeStyleTests","container","cssText","divStyle","pixelPositionVal","reliableMarginLe...

* StatefulSet in apps/v1 is now included in Conformance Tests. ([#60336](https://github.com/kubernetes/kubernetes/pull/60336), [@enisoc](https://github.com/enisoc))

* dockertools: disable memory swap on Linux. ([#59404](https://github.com/kubernetes/kubernetes/pull/59404), [@ohmystack](https://github.com/ohmystack))

- Kubectl: print error if users place flags before plugin name ([#92343](https://github.com/kubernetes/kubernetes/pull/92343), [@knight42](https://github.com/knight42)) [SIG CLI]
- Kubelet: assume that swap is disabled when `/proc/swaps` does not exist ([#93931](https://github.com/kubernetes/kubernetes/pull/93931), [@SataQiu](https://github.com/SataQiu)) [SIG Node]