Messages in this thread | | | Date | Wed, 6 May 2009 14:30:30 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH] x86: 46 bit PAE support |
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* Rik van Riel <riel@redhat.com> wrote:
> H. Peter Anvin wrote: >> Rik van Riel wrote: >>> Testing: booted it on an x86-64 system with 6GB RAM. Did you really think >>> I had access to a system with 64TB of RAM? :) >> >> No, but it would be good if we could test it under Qemu or KVM with an >> appropriately set up sparse memory map. > > I don't have a system with 1TB either, which is how much space > the memmap[] would take...
Not if the physical layout is sparse. I.e. something silly like:
BIOS-e820: 0000000100000000 - 0000000140000000 (usable) BIOS-e820: 0000200000000000 - 0000200040000000 (usable)
Which is 1GB of RAM at 4GB physical offset, and another 1GB of RAM at 32 TB physical offset. Takes two gigs of real RAM and a kernel modified with your patch, to not get confused by this :-)
Ingo
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