[PATCH] Only reset e820 once, even with multiple memmap=exactmap params

[Yinghai Lu]

On Thu, Jan 10, 2013 at 6:26 AM, Vivek Goyal <vgoyal at redhat.com> wrote:
>
> This happens only in case of kdump and not kexec. In case of kdump
> we want second kernel to use only selected memory areas.
>
> In fact this is one improvement area. Instead of using memmap= entries
> in kdump case, we should probably modify the e820 map passed in
> zero page and get rid of memmap= entries.

then how the kdump kernel get saved_max_pfn?

may have problem for read_oldmem with crashed kernel.

Yinghai