superpages?

[Wojciech Puchar]

>  [amd64, i386] The FreeBSD virtual memory subsystem now supports
>  fully transparent use of superpages for application memory;
>  application memory pages are dynamically promoted to or demoted from
>  superpages without any modification to application code. This change
>  offers the benefit of large page sizes such as improved virtual
>  memory efficiency and reduced TLB (translation lookaside buffer)
>  misses without downsides like application changes and virtual memory
>  inflexibility. This is disabled by default and can be enabled by
>  setting a loader tunable vm.pmap.pg_ps_enabled to 1.

very important change. i will have to check.
thank you very much