* to that of {@code ConcurrentHashMap} in a reusable form, and extends it for semaphores and
 * read-write locks. Conceptually, lock striping is the technique of dividing a lock into many
 * <i>stripes</i>, increasing the granularity of a single lock and allowing independent operations
 * to lock different stripes and proceed concurrently, instead of creating contention for a single
 * lock.
 *

   * write, and twice for each cache loading computation (once prior to loading the new value, and
   * once after loading completes). Much internal cache management is performed at the segment
   * granularity. For example, access queues and write queues are kept per segment when they are
   * required by the selected eviction algorithm. As such, when writing unit tests it is not

- Added `kubectl node drain` helper callbacks `OnPodDeletionOrEvictionStarted`
  and `OnPodDeletionOrEvictionFailed`; people extending `kubectl` can use these
  new callbacks for more granularity. Deprecated the `OnPodDeletedOrEvicted`
  node drain helper callback. ([#117502](https://github.com/kubernetes/kubernetes/pull/117502), [@adilGhaffarDev](https://github.com/adilGhaffarDev))

* Checked whether balanced Pods were created. ([#47488](https://github.com/kubernetes/kubernetes/pull/47488), [@k82cn](https://github.com/k82cn))
* Update protobuf time serialization for a one second granularity ([#47975](https://github.com/kubernetes/kubernetes/pull/47975), [@deads2k](https://github.com/deads2k))