V_dyn_buckets_max
if (V_curr_dyn_buckets < V_dyn_buckets_max &&
if (buckets > V_dyn_buckets_max)
buckets = V_dyn_buckets_max;
V_dyn_buckets_max = 8192; /* must be power of 2 */
nbuckets = V_dyn_buckets_max;
V_dyn_buckets_max = 1 << fls(nbuckets - 1);