>>I was thinking of Ubuntu 10.04. My question is should I do 32 or 64 >>bit? If I go 32-bit I will not be able to use all the ram, and if I go >>64-bit I may not have all the drivers. >As to "not using all of your memory" with a 32-bit OS, I think you have >a misconception of how virtual vs real memory works. > >It is true that a 32-bit machine can only access 4GB, and sometimes even >less than that (depending on how the application address space is >organized) in one *virtual* address space, but this does not necessarily >stop the kernel from "using all of RAM". It is just that various parts >of multiple virtual address spaces get mapped into the physical memory >of the machine. It was this concept that allowed the old PDP-11s, which >had only a 64K memory address space (128K with separate "instruction" >and "data" address spaces) utilize all of the physical memory on >machines that had multiple megabytes of RAM. > >So even a "32-bit" OS could fully utilize the real memory of a 64-bit >CPU machine having multiple gigabytes of RAM if its memory management >software allows....it is just that the applications are limited to a >32-bit space at one time. > >md
And doesn't the pae kernel address these issues? I'd grab that, whatever you're using. Susan _______________________________________________ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
