Failing to allocate 1GB Hugepages - KASLR

Issue

In a system with all the set up for 1GB hugepages, but not much memory (less than 10GB), the systems refuse to allocate a hugepage, even right after boot.

For instance, by running this command in a system with no hugepages allocated:

  # echo 1 > /sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages

It will not allocate the memory. To check, read the file, and see if it will return 0 pages allocated.