I was looking at the recent for >MAX_ORDER hash tables but it seems that
the patch limits the number of entries to what it thinks are good values
and the i/dhash_entries cmdline options can not exceed this.

This seems to limit the usability of the patch on systems were larger
allocations that the ones the kernel calculates are desired.

- Make ihash_entries and dhash_entries cmdline option behave like it use to.

- Remove MAX_SYS_HASH_TABLE_ORDER.  Limit the max size to 1/16 the total
  number of pages.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>