vm.kmem_size_scale tunable only accepts whole numbers?

[Mark Felder]

Hello,

Is there a reason why vm.kmem_size_scale only accepts whole numbers?
FreeNAS sets vm.kmem_size to 1.25*hw.realmem, but a smarter way of
setting this would to be able to use vm.kmem_size_scale with rational
numbers.

Thanks!

-- 
  Mark Felder
  ports-secteam member
  feld at FreeBSD.org