This tip returns the file path almost instantly:
[root@omiday ~]# time find / -xdev -inum 2883629 /var/log/dnf.librepo.log-20161120 real 0m17.867s user 0m0.575s sys 0m8.186s [root@omiday ~]# time debugfs -R 'ncheck 2883629' /dev/dm-1 debugfs 1.43.3 (04-Sep-2016) Inode Pathname 2883629 /var/log/dnf.librepo.log-20161120 real 0m0.316s user 0m0.149s sys 0m0.162s