Copy huge files system

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gethugepagesizes

GETHUGEPAGESIZES(3)					     Library Functions Manual					       GETHUGEPAGESIZES(3)

NAME

       gethugepagesizes - Get the system supported huge page sizes

SYNOPSIS

       #include <hugetlbfs.h>

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

DESCRIPTION

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

RETURN VALUE

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

ERRORS

       EINVAL n_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.

NOTES

       This call will return all huge 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 all 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.

SEE ALSO

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

AUTHORS

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

								 October 10, 2008					       GETHUGEPAGESIZES(3)

AIX