svn commit: r305391 - head/sys/arm64/arm64

[Alan Cox]

On 09/04/2016 12:50, Andrew Turner wrote:
> Author: andrew
> Date: Sun Sep  4 17:50:23 2016
> New Revision: 305391
> URL: https://svnweb.freebsd.org/changeset/base/305391
>
> Log:
>   Enable superpages on arm64 by default. These seem to be stable, having
>   survived multiple world and kernel builds, and of poudriere building full
>   package sets.
>   
>   I have observed a 3% reduction in buildworld times with superpages enabled,
>   however further testing is needed to see if this is observed in other
>   workloads.
>   

Is the starting address of the text section on arm64 superpage aligned,
like it is on amd64?  If so, I expect that the reduction will increase
if you implement support for superpage mappings in pmap_enter_object().