getpagesizes - Get the system supported huge page sizes

       libhugetlbfs was written by various people on the libhugetlbfs-devel mailing list.

                                                October 10, 2008                                 GETPAGESIZES(3)

       The  getpagesizes()  function  returns  either  the  number  of  system supported page sizes or the sizes
       themselves. If pagesizes is NULL and n_elem is 0, then  the  number  of  pages  the  system  supports  is
       returned. Otherwise, pagesizes is filled with at most n_elem page sizes.

EINVALn_elem is less than zero or n_elem is greater than zero and pagesizes is NULL.

       Also  see  opendir(3)  for  other  possible  values for errno. This error occurs when the sysfs directory
       exists but cannot be opened.

       getpagesizes - Get the system supported huge page sizes

       This call will return all page sizes as reported by the kernel.  Not all of these sizes may be usable  by
       the  programmer  since mount points may not be available for the huge page sizes.  To test whether a size
       will be usable by libhugetlbfs, hugetlbfs_find_path_for_size() can be called on a specific size to see if
       a mount point is configured.

       On success, either the number of page sizes supported by the system or the number of page sizes stored in
       pagesizes is returned. On failure, -1 is returned and errno is set appropriately.

oprofile(1),opendir(3),gethugepagesizes(3),libhugetlbfs(7)

#include<hugetlbfs.h>

       int getpagesizes(long pagesizes[], int n_elem);