-By default the value 0755 is picked. The size option sets the maximum value of
-memory (huge pages) allowed for that filesystem (/mnt/huge). The size is
-rounded down to HPAGE_SIZE. The option nr_inodes sets the maximum number of
-inodes that /mnt/huge can use. If the size or nr_inodes option is not
-provided on command line then no limits are set. For size and nr_inodes
-options, you can use [G|g]/[M|m]/[K|k] to represent giga/mega/kilo. For
-example, size=2K has the same meaning as size=2048.
+By default the value 0755 is picked. If the paltform supports multiple huge
+page sizes, the pagesize option can be used to specify the huge page size and
+associated pool. pagesize is specified in bytes. If pagesize is not specified
+the paltform's default huge page size and associated pool will be used. The
+size option sets the maximum value of memory (huge pages) allowed for that
+filesystem (/mnt/huge). The size option can be specified in bytes, or as a
+percentage of the specified huge page pool (nr_hugepages). The size is
+rounded down to HPAGE_SIZE boundary. The min_size option sets the minimum
+value of memory (huge pages) allowed for the filesystem. min_size can be
+specified in the same way as size, either bytes or a percentage of the
+huge page pool. At mount time, the number of huge pages specified by
+min_size are reserved for use by the filesystem. If there are not enough
+free huge pages available, the mount will fail. As huge pages are allocated
+to the filesystem and freed, the reserve count is adjusted so that the sum
+of allocated and reserved huge pages is always at least min_size. The option
+nr_inodes sets the maximum number of inodes that /mnt/huge can use. If the
+size, min_size or nr_inodes option is not provided on command line then
+no limits are set. For pagesize, size, min_size and nr_inodes options, you
+can use [G|g]/[M|m]/[K|k] to represent giga/mega/kilo. For example, size=2K
+has the same meaning as size=2048.