Maximum bootable kernel size in current ARM linux

[Catalin Marinas]

On Tue, 2010-09-14 at 13:37 -0400, Nicolas Pitre wrote:
> On Tue, 14 Sep 2010, Catalin Marinas wrote:
> 
> > I think the Thumb-2 branch goes up to 16MB range. The Thumb-1 may be
> > smaller but we don't support this in the kernel. That's why Thumb-2
> > modules are within 8MB below PAGE_OFFSET. But this leaves us with
> > maximum 8MB of kernel size.
> 
> Hmmm.  Would be worth moving the pkmap area below modules then.

So currently the pkmap area is at PAGE_OFFSET - 2MB. On a Thumb-2 kernel
with highmem enabled we would have 6MB available to modules. Is this big
enough? If not, we could move the pkmap area.

BTW, can it be moved in the top part of the memory rather than below
PAGE_OFFSET?

-- 
Catalin