si.NextGen()
		si.FreeRange(PageBase(BaseChunkIdx, 0), PageBase(BaseChunkIdx+64, 0))
		for ci := BaseChunkIdx; ci < BaseChunkIdx+64; ci++ {
			si.SetEmpty(ci)
		}
		si.ResetSearchAddrs()

		// Create and return test functions.
		mark = func(base, limit uintptr) {
			t.Helper()

			si.AllocRange(base, limit)
			si.FreeRange(base, limit)
		}

		s.i.free(sc, si, pallocChunkPages-si)
		for c := sc + 1; c < ec; c++ {
			s.i.free(c, 0, pallocChunkPages)
		}
		s.i.free(ec, 0, ei+1)
	}
}

func (s *ScavengeIndex) ResetSearchAddrs() {
	for _, a := range []*atomicOffAddr{&s.i.searchAddrBg, &s.i.searchAddrForce} {
		addr, marked := a.Load()
		if marked {
			a.StoreUnmark(addr, addr)
		}
		a.Clear()
	}