Re: [Lhms-devel] [RFC] fix for hot-add enabled SRAT/BIOS and numa KVA areas

Dave Hansen
2004-11-17T22:42:41Z

On Wed, 2004-11-17 at 14:33, Yasunori Goto wrote:
> But e820 probably indicates just memory areas which
> are already connected on the board, right?

It's more than that. It indicates which were connected the first time
that the machine was powered on. If you suspend or hibernate the system
for some reason, it has to always present the e820 as it initially
appeared.

> BTW, I have a question.
> - Can x445 be attached memory without removing the node?
> In my concern machine, there is no physical space to
> hot add or exchange memory without physical removing
> the node. But, this SRAT table indicate that
> all of proximity is 0x01....
> Or is it just logical attachment?

You can't remove nodes, just DIMMs. The x440 hotplug is more like the
SMP case that I've always been concerned with.

-- Dave