PFD_MAX
new_cnt = PFD_MAX +
i = PFD_MAX;
for (j = PFD_MAX; nfds > 0 && j < idx_peers; j++)
new_cnt = PFD_MAX + constraint_cnt;
i = PFD_MAX;
for (j = PFD_MAX; nfds > 0 && j < i; j++) {