Messages in this thread | | | Date | Sun, 7 Mar 1999 21:33:45 -0800 | From | Guy Sotomayor <> | Subject | Re: Grr.. |
| |
Quoted mail: > AFAIK, that extra 4 bit of address space on the PPro and Xeon is not > linearly addressable, but is divided into banks of memory, and you > switch between them. > > you can use that memory sure, but not without the ugly code to use > the bank-switching kludge/feature of PPro's and Xeon's. > > if you find anyone crazy enough to waste money on 2GB+ of RAM for an > intel, tell me - i want to send them my CV.. 8^). > ---End quote No, the extra 4 bits of physical address are achieved by making pte twice as large (so architecturally it could support 64 bit physical addresses). In order to retain the 4GB virtual, Intel added a third level in the page directory scheme. No bank switching required (just more pde's).
TTFN - Guy
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |