RFC: Change x86-64 maximum page size to 2MB

[Nick Clifton]

Hi H. J.

> The current x86-64 maximum page size is 1MB. With the future
> development, 2MB is better for performance. Using 2MB won't break
> anything, except for up to 2MB gap in virtual address space per file,
> instead of 1MB. x86-64 has 48 bits in virtual address space. It
> shouldn't be an issue for most applications. I have a patch:
> 
> http://sourceware.org/ml/binutils/2005-05/msg00644.html
> 
> which can be used to implement "-z max-page-size=xxxx" so that people
> can control maximum page size at the link time if they prefer different
> maximum page size.

This seems to be perfectly reasonable.

Cheers
   Nick