With CONFIG_HUGETLBFS:
$ sudo dmesg | grep -i huge [ 0.140447] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages [ 0.140496] HugeTLB registered 32.0 MiB page size, pre-allocated 0 pages [ 0.140522] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages [ 0.140546] HugeTLB registered 64.0 KiB page size, pre-allocated 0 pages [ 10.532665] systemd[1]: Mounting Huge Pages File System... [ 10.801024] systemd[1]: Mounted Huge Pages File System.
With CONFIG_HUGETLBFS:
$ sudo dmesg | grep -i huge
[ 0.140447] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages
[ 0.140496] HugeTLB registered 32.0 MiB page size, pre-allocated 0 pages
[ 0.140522] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
[ 0.140546] HugeTLB registered 64.0 KiB page size, pre-allocated 0 pages
[ 10.532665] systemd[1]: Mounting Huge Pages File System...
[ 10.801024] systemd[1]: Mounted Huge Pages File System.