On Sun, Mar 1, 2009 at 4:29 PM, H. Peter Anvin <hpa@zytor.com> wrote:
> It's still really ugly, though.  A much easier and cleaner way would seem to
> be to calculate a far limit on the brk and then marking it as a formal
> (non-alloc) section in the linker script and vmlinux file.  That way
> anything that examines the vmlinux file will see it as an exclusion section.
>  We can (and should) even verify that we don't overflow the brk and panic if
> we do.

please check attached patch.

[PATCH] x86: put initial_pg_tables into .bss -v4

Impact: cleanup

Don't use ram after _end blindly for pagetables. aka init pages is before _end
put those pg table into .bss

v2: keep initial page table up to 512M only.
v4: put initial page tables just before _end

Signed-off-by: Yinghai Lu <yinghai@kernel.org>


YH