setup := func(t *testing.T, force bool) (mark markFunc, find findFunc, nextGen func()) {
		t.Helper()

		// Pick some reasonable bounds. We don't need a huge range just to test.
		si := NewScavengeIndex(BaseChunkIdx, BaseChunkIdx+64)

		// Initialize all the chunks as dense and empty.
		//
		// Also, reset search addresses so that we can get page offsets.

	if !parked {
		panic("tried to clean up scavenger that is not parked")
	}
	close(s.stop)
	s.Wake()
	<-s.done
}

type ScavengeIndex struct {
	i scavengeIndex
}

func NewScavengeIndex(min, max ChunkIdx) *ScavengeIndex {
	s := new(ScavengeIndex)
	// This is a bit lazy but we easily guarantee we'll be able
	// to reference all the relevant chunks. The worst-case