imported from https://holmeshe.me/understanding-memcached-source-code-II/

preallocate@memcached.c

...
   bool preallocate = false;
...
        case 'L' :
            if (enable_large_pages() == 0) {
                preallocate = true;
            } else {
                fprintf(stderr, "Cannot enable large pages on this system\n"
                    "(There is no Linux support as of this version)\n");
                return 1;
            }
            break;
...