Re: [RFC 0/2] Delay initializing of large sections of memory

[Yinghai Lu]

> It is worth experimenting with but the big question would be,
> if it still avoids the very expensive "memmap_init_zone" and
> it's sub-functions using huge expanses of memory.  I'll do some
> experimenting as soon as I can.  Our 32TB system is being
> brought back to 16TB (we found a number of problems as we
> get closer and closer to the 64TB limit), but that's still
> a significant size.

According to Intel SDM, CPU could support 52bits physical addressing.

So how linux kernel will handle it? as we only have 48bits virtual addressing.

Yinghai
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