On UP builds we include lots of spare pacas.  Lets get rid of them and save
some space.  Also catch the small SMP case.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>