Quote:>Can anyone tell me the flag or/optin to set during configuration?
Quote:>Does anyone know whether or not the kernel distributed with the SuSE 7.3
>distribution is compiled appropriately to deal with memory > 4GB?
Using memory under 1GB allows using an offset bit to a base address.
This offset can be loaded into a cpu register without loading a
full address from memory, consequently, this is the fastest option.
Using memory between 1GB adn 4GB requires a full 32bit address. The
entire address must be loaded into a register, and this causes cache
misses, which decreases performance.
Above 4GB, you are using 36bit addressing. Since this method is not
"natively" supported on 32 bit architectures, the machine must read
each parity bit and interpret it as RAM. This interpreting overhead
causes a performance hit.