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SubjectRe: [PATCH 4/8] x86 boot: allow overlapping ebda and efi memmap memory ranges
Paul Jackson wrote:
> Yinghai wrote:
>> like to see to make reserve_ebda_region() more smart like the old
>> way when andi introduced ebda_size... instead of reserve 0x9000 to
>> 0x100000 all the way.
> Looking back at some older kernels, that code seems to have setup an
> ebda region only if there was a non-zero real mode pointer at 0x40E.
> This is rather different than always setting up such a region.

Well, sort of. Only some very old systems will not have had one.

0x40E contains the pointer to the EBDA; this basically tests for the
existence of an EBDA at all.


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