Re: [Lhms-devel] [PATCH 1/10] hot-add-mem x86_64: acpi motherboardfix

From: KAMEZAWA Hiroyuki
Date: Mon Aug 07 2006 - 22:11:03 EST

On Mon, 07 Aug 2006 17:56:56 -0700
keith mannthey <kmannth@xxxxxxxxxx> wrote:

> I know of no x86_64 hardware the supports empty node hot-add memory. If
> it exists I would recommend using SPARSEMEM based hot-add. On HW I am
> aware of there is always some memory present in a node at boot.
O.K one more.

I know x86_64 has ZONE_DMA32. A system boot with only memory below 4G
has no avilable memory in ZONE_NORMAL. If a new memory above 4G is added,
ZONE_NORMAL comes as *new* zone.
ZONE_NORMAL is empty at boot, so it's not in zonelist at boot.

is this not problem ?


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