Re: [RFC][PATCH] Randomize kernel base address on boot

Ingo Molnar
2011-05-25T14:14:46Z

* Dan Rosenberg <drosenberg@vsecurity.com> wrote:

> I'm going to continue to enforce the requirement that 16 MB is the
> lowest address we can safely load the kernel, and I'd still
> appreciate any information on why 2/4 MB default alignment might
> cause problems.

The 16 MB limit is more about preserving 24-bit addressable memory
than about safety: it is a useful resource to certain physical
devices and we do not want to reduce that resource by ~12.5% by
putting a ~2MB kernel image into it.

But yes, we want to load above 16 MB, if RAM size makes it possible.

Thanks,

Ingo