Messages in this thread | | | Date | Thu, 07 May 2009 07:27:30 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] x86: 46 bit PAE support |
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Ingo Molnar wrote: > > Yes, struct page is ~64 bytes, and 64*64 == 4096. > > Alas, it's not a problem: my suggestion wasnt to simulate 64 TB of > RAM. My suggestion was to create a sparse physical memory map (in a > virtual machine) that spreads ~1GB of RAM all around the 64 TB > physical address space. That will test whether the kernel is able to > map and work with such physical addresses. (which will cover most of > the issues) > > A good look at /debug/x86/dump_pagetables with such a system booted > up would be nice as well - to make sure every virtual memory range > is in its proper area, and that there's enough free space around > them. >
We're working on simulating this at Intel. We should hopefully be able to test this next week.
-hpa
-- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.
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