Very large memory configurations: > 16 TB

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SGI is currently developing an x86_64 system with more than 16TB of memory per
SSI. As far as I can tell, this should be supported. The relevant definitions
such as MAX_PHYSMEM_BITS appear ok.


One area of concern is page counts. Exceeding 16TB will also exceed MAX_INT
page frames. The kernel (at least in all places I've found) keep pagecounts
in longs.

Have I missed anything? Should this > 16TB work? Are there any kernel problems or
problems with user tools that anyone knows of.

Any help or pointers to potential problem areas would be appreciated...

---
Jack Steiner (steiner@xxxxxxx)
SGI - Silicon Graphics, Inc. 
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