### PID Limits graduates to General Availability

PID Limits features are now generally available on both `SupportNodePidsLimit` (node-to-pod PID isolation) and `SupportPodPidsLimit` (ability to limit PIDs per pod), after being enabled-by-default in beta stage for a year.

* Some container runtimes share a process (PID) namespace for all containers in a pod. This will become the default for Docker in a future release of Kubernetes. You can preview this functionality if running with the CRI and Docker 1.13.1 by enabling the --experimental-docker-enable-shared-pid kubelet flag. ([#41583](https://github.com/kubernetes/kubernetes/pull/41583), [@verb](https://github.com/verb))

When using the separate flag, the order in which they're specified doesn't matter.  ([#58123](https://github.com/kubernetes/kubernetes/pull/58123), [@hzxuzhonghu](https://github.com/hzxuzhonghu))

* The kubelet  --docker-disable-shared-pid flag, which runs docker containers with a process namespace that is shared between all containers in a pod, is now deprecated and will be removed in a future release. It is replaced by `v1.Pod.Spec.ShareProcessNamespace`, which configures this behavior....

* Sharing a PID namespace between containers in a pod is disabled by default in 1.8. To enable for a node, use the --docker-disable-shared-pid=false kubelet flag. Note that PID namespace sharing requires docker >= 1.13.1. ([#51634](https://github.com/kubernetes/kubernetes/pull/51634), [@verb](https://github.com/verb))

pkg syscall (netbsd-arm64-cgo), type Flock_t struct
pkg syscall (netbsd-arm64-cgo), type Flock_t struct, Len int64
pkg syscall (netbsd-arm64-cgo), type Flock_t struct, Pid int32
pkg syscall (netbsd-arm64-cgo), type Flock_t struct, Start int64
pkg syscall (netbsd-arm64-cgo), type Flock_t struct, Type int16
pkg syscall (netbsd-arm64-cgo), type Flock_t struct, Whence int16

pkg syscall (freebsd-arm64), type Flock_t struct
pkg syscall (freebsd-arm64), type Flock_t struct, Len int64
pkg syscall (freebsd-arm64), type Flock_t struct, Pad_cgo_0 [4]uint8
pkg syscall (freebsd-arm64), type Flock_t struct, Pid int32
pkg syscall (freebsd-arm64), type Flock_t struct, Start int64
pkg syscall (freebsd-arm64), type Flock_t struct, Sysid int32
pkg syscall (freebsd-arm64), type Flock_t struct, Type int16

pkg syscall (darwin-arm64), type FdSet struct, Bits [32]int32
pkg syscall (darwin-arm64), type Flock_t struct
pkg syscall (darwin-arm64), type Flock_t struct, Len int64
pkg syscall (darwin-arm64), type Flock_t struct, Pid int32
pkg syscall (darwin-arm64), type Flock_t struct, Start int64
pkg syscall (darwin-arm64), type Flock_t struct, Type int16
pkg syscall (darwin-arm64), type Flock_t struct, Whence int16

  * **WARNING:** A [known issue](https://github.com/kubernetes/kubernetes/issues/44041)
    in v1.6.0 causes `Pod.Spec.HostPid` (using the host PID namespace for the pod) to always
    be false. Please wait for v1.6.2, which will include a fix for this issue.
* Various scheduling features have graduated to beta:

pkg syscall (freebsd-riscv64), type Flock_t struct, Len int64 #53466
pkg syscall (freebsd-riscv64), type Flock_t struct, Pad_cgo_0 [4]uint8 #53466
pkg syscall (freebsd-riscv64), type Flock_t struct, Pid int32 #53466
pkg syscall (freebsd-riscv64), type Flock_t struct, Start int64 #53466
pkg syscall (freebsd-riscv64), type Flock_t struct, Sysid int32 #53466
pkg syscall (freebsd-riscv64), type Flock_t struct, Type int16 #53466

physio

// pics : 2013-11-14 XYZ.COM LLC
pics

// pictet : 2014-06-26 Pictet Europe S.A.
pictet

// pictures : 2014-03-06 Binky Moon, LLC
pictures

// pid : 2015-01-08 Top Level Spectrum, Inc.
pid

// pin : 2014-12-18 Amazon Registry Services, Inc.
pin

// ping : 2015-06-11 Ping Registry Provider, Inc.
ping

// pink : 2013-10-01 Identity Digital Limited
pink