Re: [PATCH 00 of 36] x86/paravirt: groundwork for 64-bit Xen support
From: Jeremy Fitzhardinge
Date: Wed Jun 25 2008 - 16:04:35 EST
Andi Kleen wrote:
Jeremy Fitzhardinge <jeremy@xxxxxxxx> writes:
This moves __PAGE_OFFSET up by 16 GDT slots, from 0xffff810000000000
GDT? PDP?
I meant PGD slots. Or PML4 in x86 terms.
to 0xffff880000000000. I have no general justification for this: th
This will significantly decrease the maximum amount of physical
memory supported by Linux longer term.
A bit, but not "significantly". We'd already discussed that if the
amount of physical starts approaching 2^48 then we'd hope that the chips
will grow some more virtual bits.
J
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