* Image GC logic should compensate for reserved blocks ([#27996](https://github.com/kubernetes/kubernetes/pull/27996), [@ronnielai](https://github.com/ronnielai))
* Bump minimum API version for docker to 1.21 ([#27208](https://github.com/kubernetes/kubernetes/pull/27208), [@yujuhong](https://github.com/yujuhong))

pkg syscall (freebsd-arm64), type Stat_t struct, Birthtimespec Timespec
pkg syscall (freebsd-arm64), type Stat_t struct, Blksize int32
pkg syscall (freebsd-arm64), type Stat_t struct, Blocks int64
pkg syscall (freebsd-arm64), type Stat_t struct, Ctimespec Timespec
pkg syscall (freebsd-arm64), type Stat_t struct, Dev uint64
pkg syscall (freebsd-arm64), type Stat_t struct, Flags uint32

pkg syscall (darwin-arm64), type Stat_t struct, Birthtimespec Timespec
pkg syscall (darwin-arm64), type Stat_t struct, Blksize int32
pkg syscall (darwin-arm64), type Stat_t struct, Blocks int64
pkg syscall (darwin-arm64), type Stat_t struct, Ctimespec Timespec
pkg syscall (darwin-arm64), type Stat_t struct, Dev int32
pkg syscall (darwin-arm64), type Stat_t struct, Flags uint32

### Locks

We have 3 different things that we synchronize on.

#### Http2Connection

This lock guards internal state of each connection. This lock is never held for blocking operations. That means that we acquire the lock, read or write a few fields and release the lock. No I/O and no application-layer callbacks.

#### Http2Stream

    private int lockSequenceIndex;
    private byte[] fileId;
    private final Smb2Lock[] locks;

    /**
     * Constructs an SMB2 lock request with the specified parameters.
     *
     * @param config the configuration for this request
     * @param fileId the file identifier for the file to lock
     * @param locks the array of lock elements to apply
     */

 * method equivalent to {@link
 * java.util.concurrent.locks.ReentrantLock#hasWaiters(java.util.concurrent.locks.Condition)},
 * except that the method parameter must accept whatever condition-like object is passed into {@code
 * callAndAssertWaits} by the test.
 *
 * @param <L> the type of the lock-like object to be used
 * @author Justin T. Sampson
 */

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pkg syscall (freebsd-riscv64), type Stat_t struct, Birthtimespec Timespec #53466
pkg syscall (freebsd-riscv64), type Stat_t struct, Blksize int32 #53466
pkg syscall (freebsd-riscv64), type Stat_t struct, Blocks int64 #53466
pkg syscall (freebsd-riscv64), type Stat_t struct, Ctimespec Timespec #53466
pkg syscall (freebsd-riscv64), type Stat_t struct, Dev uint64 #53466

    return impl.get(numStripes);
  }

  // a place to put the locks in sizeOfPopulatedStriped so they don't get GC'd before we measure
  final List<Lock> locks = new ArrayList<>(numStripes);

  @Footprint
  Object sizeOfPopulatedStriped() {
    locks.clear();
    Striped<Lock> striped = impl.get(numStripes);
    for (int i : stripes) {
      locks.add(striped.getAt(i));
    }
    return striped;
  }

    return impl.get(numStripes);
  }

  // a place to put the locks in sizeOfPopulatedStriped so they don't get GC'd before we measure
  final List<Lock> locks = new ArrayList<>(numStripes);

  @Footprint
  Object sizeOfPopulatedStriped() {
    locks.clear();
    Striped<Lock> striped = impl.get(numStripes);
    for (int i : stripes) {
      locks.add(striped.getAt(i));
    }
    return striped;
  }