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. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>