-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Sun, Jun 17, 2007 at 03:04:06PM +0200, Lo?c Greni? wrote: > The point is: if the BIOS only enables the first 2GB, the kernel of the > OS > can enable the other 2 provided > 1) the hardware can (I think the Turion 64 should not have problems with > 4GB+ RAM, but the BIOS migth refuse to boot) And what if Dell decided not to wire address lines 32 and up? There is no way the BIOS or the OS can route those extra wires to the memory sockets. > 2) the programmer has access to the doc of the memory controller (in that > case the Turion 64) > 3) the wind is following. > > The questions are thus: > 1) Will the computer boot with 4GB installed ? (I'd mind to throw away 250$ > to just test it) It will probably boot but because there are only 31 address lines wired the CPU will only see 2GB. > 2) I've found the docs of the Opteron on AMD site (I've looked there maybe a > hundred of times and found them only yesterday, call me stupid). It > looks feasible > to enable memory at run-time and to put it above the 4GB limit. So point 2 > looks > solvable. Also try to get hold of the docs of your laptop (that might be surprisingly hard) or just visually inspect how the memory sockets are wired. > 3) Is it easy to tell the MM subsystem that a module has "just found" > another couple of GB lying between the 4GB and the 6GB marks ? Should be possible with memory hot plugging, IIRC SGI is working on that. But again: the memory has to be physically wired. Erik - -- They're all fools. Don't worry. Darwin may be slow, but he'll eventually get them. -- Matthew Lammers in alt.sysadmin.recovery -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFGdTan/PlVHJtIto0RAgxXAJ4vdUWRyeKAhBKbJlsN/tLlkjyFbACfVMo+ uImkktHVOAE7DQtwWok+xpw= =YNJ/ -----END PGP SIGNATURE----- -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
